ISP1122A Universal Serial Bus stand-alone hub Rev. 02 -- 6 June 2000 Product specification 1. General description The ISP1122A is a stand-alone Universal Serial Bus (USB) hub device which complies with USB Specification Rev. 1.1. It integrates a Serial Interface Engine (SIE), hub repeater, hub controller, USB data transceivers and a 3.3 V voltage regulator. It has a configurable number of downstream ports, ranging from 2 to 5. The ISP1122A can be bus-powered, self-powered or hybrid-powered. When it is hybrid-powered the hub functions are powered by the upstream power supply (VBUS), but the downstream ports are powered by an external 5 Volt supply. The low power consumption in `suspend' mode allows easy design of equipment that is compliant with the ACPITM, OnNowTM and USB power management requirements. The ISP1122A has built-in overcurrent sense inputs, supporting individual and global overcurrent protection for downstream ports. All ports (including the hub) have GoodLinkTM indicator outputs for easy visual monitoring of USB traffic. The ISP1122A has a serial I2C-bus interface for external EEPROM access and a reduced frequency (6 MHz) crystal oscillator. These features allow significant cost savings in system design and easy implementation of advanced USB functionality into PC peripherals. 2. Features c c High performance USB hub device with integrated hub repeater, hub controller, Serial Interface Engine (SIE), data transceivers and 3.3 V voltage regulator Complies with Universal Serial Bus Specification Rev. 1.1 and ACPI, OnNow and USB power management requirements Configurable from 2 to 5 downstream ports with automatic speed detection Internal power-on reset and low voltage reset circuit Supports bus-powered, hybrid-powered and self-powered application Individual or ganged power switching for downstream ports Individual or global port overcurrent protection with built-in sense circuits 6 MHz crystal oscillator with on-chip PLL for low EMI Visual USB traffic monitoring (GoodLinkTM) for hub and downstream ports I2C-bus interface to read vendor ID, product ID and configuration bits from external EEPROM Operation over the extended USB bus voltage range (4.0 to 5.5 V) Operating temperature range -40 to +85 C 8 kV in-circuit ESD protection for lower cost of external components ISP1122A Philips Semiconductors USB stand-alone hub Full-scan design with high test coverage Available in 32-pin SDIP, SO and LQFP packages. 3. Ordering information Table 1: Ordering information Type number Package Name Description Version ISP1122AD SO32 plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 ISP1122ANB SDIP32 plastic shrink dual in-line package; 32 leads (400 mil) SOT232-1 ISP1122ABD LQFP32 plastic low profile quad flat package; 32 leads; body 7 x 7 x 1.4 mm SOT358-1 4. Block diagram pagewidth upstream port Vreg(3.3) VCC D+ 6 MHz D- LED 5V PLL SUPPLY REGULATOR ISP1122A ANALOG Tx / Rx HUB GoodLink PACKET GENERATOR I2C-BUS INTERFACE SDA SCL BIT CLOCK RECOVERY 3.3 V full speed PHILIPS SIE INDV HUB CONTROLLER OPTION END OF FRAME TIMERS HUB REPEATER GENERAL PORT CONTROLLER ANALOG Tx /Rx D+ GoodLink/ POWER SWITCH/ OC DETECT ANALOG Tx/ Rx D- overcurrent LED/ D+ detection power switch downstream port 1 GoodLink/ POWER SWITCH/ OC DETECT ANALOG Tx/ Rx D- overcurrent LED/ D+ detection power switch downstream port 2 GoodLink/ POWER SWITCH/ OC DETECT ANALOG Tx / Rx D- overcurrent LED/ D+ detection power switch GoodLink/ POWER SWITCH/ OC DETECT ANALOG Tx / Rx D- overcurrent LED/ D+ detection power switch downstream port 3 downstream port 4 GoodLink/ POWER SWITCH/ OC DETECT self/bus powered LED/ D- overcurrent detection power switch downstream port 5 MBL169 This is a conceptual block diagram and does not include each individual signal. Fig 1. Block diagram. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 2 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 5. Pinning information 5.1 ISP1122AD (SO32) and ISP1122ANB (SDIP32) 5.1.1 Pinning handbook, halfpage handbook, halfpage Vreg(3.3) 1 Vreg(3.3) 1 32 PSW1/GL1 32 PSW1/GL1 PSW2/GL2 2 31 DP2 PSW2/GL2 2 31 DP2 GND 3 30 DM2 GND 3 30 DM2 DM3 4 29 DP0 DM3 4 29 DP0 DP3 5 28 DM0 DP3 5 28 DM0 VCC 6 27 DP1 VCC 6 27 DP1 OC1 7 26 DM1 OC1 7 26 DM1 25 DP5 OC2 8 OC2 8 ISP1122AD 25 DP5 ISP1122ANB OC3 9 24 DM5 OC3 9 24 DM5 OC4 10 23 INDV/SDA OC4 10 23 INDV/SDA 22 OPTION/SCL OC5/GOC 11 22 OPTION/SCL OC5/GOC 11 DM4 12 21 RESET DM4 12 21 RESET DP4 13 20 XTAL2 DP4 13 20 XTAL2 SP/BP 14 19 XTAL1 SP/BP 14 19 XTAL1 HUBGL 15 18 PSW5/GL5/GPSW PSW3/GL3 16 HUBGL 15 17 PSW4/GL4 PSW3/GL3 16 MBL163 17 PSW4/GL4 MBL164 Fig 2. Pin configuration SO32. 5.1.2 18 PSW5/GL5/GPSW Fig 3. Pin configuration SDIP32. Pin description Table 2: Pin description for SO32 and SDIP32 Symbol [1] Vreg(3.3) [2] PSW2/GL2 [3] Pin Type Description 1 - regulated supply voltage (3.3 V 10%) from internal regulator; used to connect pull-up resistor on DP0 line 2 O modes 4 to 6: power switch control output for downstream port 2 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 2 (open-drain, 6 mA); to connect an LED use a 330 series resistor GND 3 - ground supply DM3 4 AI/O downstream port 3 D- connection (analog) [4] DP3 5 AI/O downstream port 3 D+ connection (analog) [4] VCC 6 - supply voltage; connect to USB supply VBUS (bus-powered or hybrid-powered) or to local supply VDD (self-powered) OC1 7 AI/I overcurrent sense input for downstream port 1 (analog [5]) OC2 8 AI/I overcurrent sense input for downstream port 2 (analog [5]) (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 3 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 2: Pin description for SO32 and SDIP32...continued Symbol [1] Pin Type Description OC3 9 AI/I overcurrent sense input for downstream port 3 (analog [5]) OC4 10 AI/I overcurrent sense input for downstream port 4 (analog [5]) OC5/GOC [3] 11 AI/I modes 5, 7: overcurrent sense input for downstream port 5 (analog [5]) modes 0, 1, 3: global overcurrent sense input (analog [5]) DM4 12 AI/O downstream port 4 D- connection (analog) [4] DP4 13 AI/O downstream port 4 D+ connection (analog) [4] SP/BP 14 I selects power mode: self-powered: connect to VDD (local power supply); also use this mode for hybrid-powered operation bus-powered: connect to GND; disable downstream port 5 to meet supply current requirements [4] HUBGL 15 O hub GoodLink LED indicator output (open-drain, 6 mA); to connect an LED use a 330 series resistor; if unused connect to VCC via a 10 k resistor PSW3/GL3 [3] 16 O modes 4 to 6: power switch control output for downstream port 3 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 3 (open-drain, 6 mA); to connect an LED use a 330 series resistor PSW4/GL4 [3] 17 O modes 4 to 6: power switch control output for downstream port 4 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 4 (open-drain, 6 mA); to connect an LED use a 330 series resistor PSW5/GL5/ GPSW [3] 18 O mode 5: power switch control output for downstream port 5 (open-drain, 6 mA) modes 3, 7: GoodLink LED indicator output for downstream port 5 (open-drain, 6 mA); to connect an LED use a 330 series resistor modes 0 to 2: gang mode power switch control output (open-drain, 6 mA) XTAL1 19 I crystal oscillator input (6 MHz) XTAL2 20 O crystal oscillator output (6 MHz) RESET [2] 21 I reset input (Schmitt trigger); a LOW level produces an asynchronous reset; connect to VCC for power-on reset (internal POR circuit) OPTION/SCL 22 I/O mode selection input; also functions as I2C-bus clock output (open-drain, 6 mA) INDV/SDA 23 I/O selects individual (HIGH) or global (LOW) power switching and overcurrent detection; also functions as bidirectional I2C-bus data line (open-drain, 6 mA) DM5 24 AI/O downstream port 5 D- connection (analog) [4] DP5 25 AI/O downstream port 5 D+ connection (analog) [4] DM1 26 AI/O downstream port 1 D- connection (analog) [6] DP1 27 AI/O downstream port 1 D+ connection (analog) [6] (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 4 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 2: Pin description for SO32 and SDIP32...continued Symbol [1] Pin Type Description DM0 28 AI/O upstream port D- connection (analog) DP0 29 AI/O upstream port D+ connection (analog) DM2 30 AI/O downstream port 2 D- connection (analog) [6] DP2 31 AI/O downstream port 2 D+ connection (analog) [6] PSW1/GL1 [3] 32 O modes 4 to 6: power switch control output for downstream port 1 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 1 (open-drain, 6 mA); to connect an LED use a 330 series resistor [1] [2] [3] [4] [5] [6] Symbol names with an overscore (e.g. NAME) indicate active LOW signals. The voltage at pin Vreg(3.3) is gated by the RESET pin. This allows fully self-powered operation by connecting RESET to VBUS (+5 V USB supply). If VBUS is lost upstream port D+ will not be driven. See Table 4 "Mode selection". To disable a downstream port connect both D+ and D- to VCC via a 1 M resistor; unused ports must be disabled in reverse order starting from port 5. Analog detection circuit can be switched off using an external EEPROM, see Table 23; in this case, the pin functions as a logic input (TTL level). Downstream ports 1 and 2 cannot be disabled. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 5 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 5.2 ISP1122ABD (LQFP32) 25 DP0 26 DM2 27 DP2 28 PSW1/GL1 31 GND 32 DM3 idth 29 Vreg(3.3) Pinning 30 PSW2/GL2 5.2.1 DP3 1 24 DM0 VCC 2 23 DP1 OC1 3 22 DM1 21 DP5 OC2 4 ISP1122ABD OC3 5 20 DM5 OC4 6 19 INDV/SDA 18 OPTION/SCL OC5/GOC 7 17 RESET XTAL2 16 XTAL1 15 PSW5/GL5/GPSW 14 PSW4/GL4 13 PSW3/GL3 12 HUBGL 11 SP/BP 10 DP4 9 DM4 8 MBL165 Fig 4. Pin configuration LQFP32. 5.2.2 Pin description Table 3: Pin description for LQFP32 Symbol [1] Vreg(3.3) [2] PSW2/GL2 [3] Pin Type Description 29 - regulated supply voltage (3.3 V 10%) from internal regulator; used to connect pull-up resistor on DP0 line 30 O modes 4 to 6: power switch control output for downstream port 2 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 2 (open-drain, 6 mA); to connect an LED use a 330 series resistor GND 31 - ground supply DM3 32 AI/O downstream port 3 D- connection (analog) [4] DP3 1 AI/O downstream port 3 D+ connection (analog) [4] VCC 2 - supply voltage; connect to USB supply VBUS (bus-powered or hybrid-powered) or to local supply VDD (self-powered) OC1 3 AI/I overcurrent sense input for downstream port 1 (analog [5]) OC2 4 AI/I overcurrent sense input for downstream port 2 (analog [5]) OC3 5 AI/I overcurrent sense input for downstream port 3 (analog [5]) OC4 6 AI/I overcurrent sense input for downstream port 4 (analog [5]) (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 6 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 3: Pin description for LQFP32...continued Symbol [1] Pin Type Description OC5/GOC [3] 7 AI/I modes 5, 7: overcurrent sense input for downstream port 5 (analog [5]) modes 0, 1, 3: global overcurrent sense input (analog [5]) DM4 8 AI/O downstream port 4 D- connection (analog) [4] DP4 9 AI/O downstream port 4 D+ connection (analog) [4] SP/BP 10 I selects power mode: self-powered: connect to VDD (local power supply); also use this mode for hybrid-powered operation bus-powered: connect to GND; disable downstream port 5 to meet supply current requirements [4] HUBGL 11 O hub GoodLink LED indicator output (open-drain, 6 mA); to connect an LED use a 330 series resistor; if unused connect to VCC via a 10 k resistor PSW3/GL3 [3] 12 O modes 4 to 6: power switch control output for downstream port 3 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 3 (open-drain, 6 mA); to connect an LED use a 330 series resistor PSW4/GL4 [3] 13 O modes 4 to 6: power switch control output for downstream port 4 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 4 (open-drain, 6 mA); to connect an LED use a 330 series resistor PSW5/GL5/ GPSW [3] 14 O mode 5: power switch control output for downstream port 5 (open-drain, 6 mA) modes 3, 7: GoodLink LED indicator output for downstream port 5 (open-drain, 6 mA); to connect an LED use a 330 series resistor modes 0 to 2: gang mode power switch control output (open-drain, 6 mA) XTAL1 15 I crystal oscillator input (6 MHz) XTAL2 16 O crystal oscillator output (6 MHz) RESET [2] 17 I reset input (Schmitt trigger); a LOW level produces an asynchronous reset; connect to VCC for power-on reset (internal POR circuit) OPTION/SCL 18 I/O mode selection input; also functions as I2C-bus clock output (open-drain, 6 mA) INDV/SDA 19 I/O selects individual (HIGH) or global (LOW) power switching and overcurrent detection; also functions as bidirectional I2C-bus data line (open-drain, 6 mA) DM5 20 AI/O downstream port 5 D- connection (analog) [4] DP5 21 AI/O downstream port 5 D+ connection (analog) [4] DM1 22 AI/O downstream port 1 D- connection (analog) [6] DP1 23 AI/O downstream port 1 D+ connection (analog) [6] DM0 24 AI/O upstream port D- connection (analog) DP0 25 AI/O upstream port D+ connection (analog) (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 7 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 3: Pin description for LQFP32...continued Symbol [1] Pin Type Description DM2 26 AI/O downstream port 2 D- connection (analog) [6] DP2 27 AI/O downstream port 2 D+ connection (analog) [6] PSW1/GL1 [3] 28 O modes 4 to 6: power switch control output for downstream port 1 (open-drain, 6 mA) modes 0 to 3, 7: GoodLink LED indicator output for downstream port 1 (open-drain, 6 mA); to connect an LED use a 330 series resistor [1] [2] [3] [4] [5] [6] Symbol names with an overscore (e.g. NAME) indicate active LOW signals. The voltage at pin Vreg(3.3) is gated by the RESET pin. This allows fully self-powered operation by connecting RESET to VBUS (+5 V USB supply). If VBUS is lost upstream port D+ will not be driven. See Table 4 "Mode selection". To disable a downstream port connect both D+ and D- to VCC via a 1 M resistor; unused ports must be disabled in reverse order starting from port 5. Analog detection circuit can be switched off using an external EEPROM, see Table 23; in this case, the pin functions as a logic input (TTL level). Downstream ports 1 and 2 cannot be disabled. 6. Functional description The ISP1122A is a stand-alone USB hub with up to 5 downstream ports. The number of ports can be configured between 2 and 5. The downstream ports can be used to connect low-speed or full-speed USB peripherals. All standard USB requests from the host are handled by the hardware without the need for firmware intervention. The block diagram is shown in Figure 1. The ISP1122A requires only a single supply voltage. An internal 3.3 V regulator provides the supply voltage for the analog USB data transceivers. The ISP1122A supports both bus-powered and self-powered hub operation. When using bus-powered operation a downstream port cannot supply more than 100 mA to a peripheral. In case of self-powered operation an external supply is used to power the downstream ports, allowing a current consumption of max. 500 mA per port. A basic I2C-bus interface is provided for reading vendor ID, product ID and configuration bits from an external EEPROM upon a reset. 6.1 Analog transceivers The integrated transceiver interfaces directly to the USB cables through external termination resistors. They are capable of transmitting and receiving serial data at both `full-speed' (12 Mbit/s) and `low-speed' (1.5 Mbit/s) data rates. The slew rates are adjusted according to the speed of the device connected and lie within the range mentioned in the USB Specification Rev. 1.1. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 8 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 6.2 Philips Serial Interface Engine (SIE) The Philips SIE implements the full USB protocol layer. It is completely hardwired for speed and needs no firmware intervention. The functions of this block include: synchronization pattern recognition, parallel/serial conversion, bit (de-)stuffing, CRC checking/generation, Packet IDentifier (PID) verification/generation, address recognition, handshake evaluation/generation. 6.3 Hub repeater The hub repeater is responsible for managing connectivity on a `per packet' basis. It implements `packet signalling' and `resume' connectivity. Low-speed devices can be connected to downstream ports. If a low-speed device is detected the repeater will not propagate upstream packets to the corresponding port, unless they are preceded by a PREAMBLE PID. 6.4 End-of-frame timers This block contains the specified EOF1 and EOF2 timers which are used to detect `loss-of-activity' and `babble' error conditions in the hub repeater. The timers also maintain the low-speed keep-alive strobe which is sent at the beginning of a frame. 6.5 General and individual port controller The general and individual port controllers together provide status and control of individual downstream ports. Any port status change will be reported to the host via the hub status change (interrupt) endpoint. 6.6 GoodLink Indication of a good USB connection is provided through GoodLink technology. An LED can be directly connected via an external 330 resistor. During enumeration the LED blinks on momentarily. After successful configuration of the ISP1122A, the LED is permanently on. The LED blinks off for 100 ms upon each successful packet transfer (with ACK). The hub GoodLink indicator blinks when the hub receives a packet addressed to it. Downstream GoodLink indicators blink upon an acknowledgment from the associated port. In `suspend' mode the LED is off. This feature provides a user-friendly indication of the status of the hub, the connected downstream devices and the USB traffic. It is a useful diagnostics tool to isolate faulty USB equipment and helps to reduce field support and hotline costs. 6.7 Bit clock recovery The bit clock recovery circuit recovers the clock from the incoming USB data stream using a 4x oversampling principle. It is able to track jitter and frequency drift as specified by the USB Specification Rev. 1.1. 6.8 Voltage regulator A 5 to 3.3 V DC-DC regulator is integrated on-chip to supply the analog transceiver and internal logic. This can also be used to supply the terminal 1.5 k pull-up resistor on the D+ line of the upstream connection. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 9 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 6.9 PLL clock multiplier A 6 to 48 MHz clock multiplier Phase-Locked Loop (PLL) is integrated on-chip. This allows for the use of low-cost 6 MHz crystals. The low crystal frequency also minimizes Electro-Magnetic Interference (EMI). The PLL requires no external components. 6.10 Overcurrent detection An overcurrent detection circuit for downstream ports has been integrated on-chip. It is self-reporting, resets automatically, has a low trip time and requires no external components. Both individual and global overcurrent detection are supported. 6.11 I2C-bus interface A basic serial I2C-bus interface (single master, 100 kHz) is provided to read VID, PID and configuration bits from an external I2C-bus EEPROM (e.g. Philips PCF8582 or equivalent). At reset the ISP1122A reads 6 bytes of data from the external memory. The I2C-bus interface timing complies with the standard mode of operation as described in The I2C-bus and how to use it, order number 9398 393 40011. 7. Modes of operation The ISP1122A has several modes of operation, each corresponding with a different pin configuration. Modes are selected by means of pins INDV, OPTION and SP/BP, as shown in Table 4. Table 4: Mode selection Mode INDV OPTION SP/BP [2] PSWn/GLn (n = 1 to 4) PSW5/GL5/GPSW OCn (n = 1 to 4) OC5/GOC 0 0 0 0 GoodLink ganged power inactive global overcurrent 1 0 0 1 GoodLink ganged power inactive global overcurrent inactive [3] [1] 2 0 1 0 GoodLink ganged power inactive [3] 3 0 1 1 GoodLink [4] GoodLink [4] inactive global overcurrent 4 1 0 0 individual power inactive individual overcurrent inactive 5 1 0 1 individual power individual power individual overcurrent individual overcurrent 6 1 1 0 individual power inactive inactive [3] inactive [3] 7 1 1 1 GoodLink [4] GoodLink [4] individual overcurrent individual overcurrent [1] [2] [3] [4] Port power switching: logic 0 = ganged, logic 1 = individual. Power mode: logic 0 = bus-powered, logic 1 = self-powered (or hybrid-powered). No overcurrent detection. No power switching. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 10 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 8. Endpoint descriptions Each USB device is logically composed of several independent endpoints. An endpoint acts as a terminus of a communication flow between the host and the device. At design time each endpoint is assigned a unique number (endpoint identifier, see Table 5). The combination of the device address (given by the host during enumeration), the endpoint number and the transfer direction allows each endpoint to be uniquely referenced. The ISP1122A has two endpoints, endpoint 0 (control) and endpoint 1 (interrupt). Table 5: Function Hub [1] Hub endpoints Ports Endpoint identifier Transfer type 0: upstream 0 control 1 interrupt 1 to 5: downstream Direction [1] Max. packet size (bytes) OUT 64 IN 64 IN 1 IN: input for the USB host; OUT: output from the USB host. 8.1 Hub endpoint 0 (control) All USB devices and functions must implement a default control endpoint (ID = 0). This endpoint is used by the host to configure the device and to perform generic USB status and control access. The ISP1122A hub supports the following USB descriptor information through its control endpoint 0, which can handle transfers of 64 bytes maximum: * * * * * * Device descriptor Configuration descriptor Interface descriptor Endpoint descriptor Hub descriptor String descriptor. 8.2 Hub endpoint 1 (interrupt) Endpoint 1 is used by the ISP1122A hub to provide status change information to the host. This endpoint can be accessed only after the hub has been configured by the host (by sending the Set Configuration command). Endpoint 1 is an interrupt endpoint: the host polls it once every 255 ms by sending an IN token. If the hub has detected no change in the port status it returns a NAK (Not AcKnowledge) response to this request, otherwise it sends the Status Change byte (see Table 6). (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 11 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 6: Status Change byte: bit allocation Bit Symbol Description 0 Hub SC a logic 1 indicates a status change on the hub's upstream port 1 Port 1 SC a logic 1 indicates a status change on downstream port 1 2 Port 2 SC a logic 1 indicates a status change on downstream port 2 3 Port 3 SC a logic 1 indicates a status change on downstream port 3 4 Port 4 SC a logic 1 indicates a status change on downstream port 4 5 Port 5 SC a logic 1 indicates a status change on downstream port 5 6 reserved not used 7 reserved not used 9. Host requests The ISP1122A handles all standard USB requests from the host via control endpoint 0. The control endpoint can handle a maximum of 64 bytes per transfer. Remark: Please note that the USB data transmission order is Least Significant Bit (LSB) first. In the following tables multi-byte variables are displayed least significant byte first. 9.1 Standard requests Table 7 shows the supported standard USB requests. Some requests are explicitly unsupported. All other requests will be responded with a STALL packet. Table 7: Standard USB requests Request name bmRequestType byte 0 [7:0] (Bin) bRequest byte 1 (Hex) wValue byte 2, 3 (Hex) wIndex byte 4, 5 (Hex) wLength byte 6, 7 (Hex) Data X000 0000 05 address [1] 00, 00 00, 00 none Get Configuration 1000 0000 08 00, 00 00, 00 01, 00 configuration value = 01H Set Configuration (0) X000 0000 09 00, 00 00, 00 00, 00 none Set Configuration (1) X000 0000 09 01, 00 00, 00 00, 00 none Get Configuration Descriptor 1000 0000 06 00, 02 00, 00 length [2] configuration, interface and endpoint descriptors Get Device Descriptor 1000 0000 06 00, 01 00, 00 length [2] device descriptor Get String Descriptor (0) 1000 0000 06 03, 00 00, 00 length [2] language ID string Get String Descriptor (1) 1000 0000 06 03, 01 00, 00 length [2] manufacturer string Get String Descriptor (2) 1000 0000 06 03, 02 00, 00 length [2] product string Address Set Address Configuration Descriptor (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 12 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 7: Standard USB requests...continued Request name bmRequestType byte 0 [7:0] (Bin) bRequest byte 1 (Hex) wValue byte 2, 3 (Hex) wIndex byte 4, 5 (Hex) wLength byte 6, 7 (Hex) Data Clear Device Feature (REMOTE_WAKEUP) X000 0000 01 01, 00 00, 00 00, 00 none Clear Endpoint (1) Feature (HALT/STALL) X000 0010 01 00, 00 81, 00 00, 00 none Set Device Feature (REMOTE_WAKEUP) X000 0000 03 01, 00 00, 00 00, 00 none Set Endpoint (1) Feature (HALT/STALL) X000 0010 03 00, 00 81, 00 00, 00 none Feature Status Get Device Status 1000 0000 00 00, 00 00, 00 02, 00 device status Get Interface Status 1000 0001 00 00, 00 00, 00 02, 00 zero Get Endpoint (0) Status 1000 0010 00 00, 00 00/80 [3], 00 02, 00 endpoint 0 status Get Endpoint (1) Status 1000 0010 00 00, 00 81, 00 02, 00 endpoint 1 status Set Descriptor 0000 0000 07 XX, XX XX, XX XX, XX descriptor; STALL Get Interface 1000 0001 0A 00, 00 XX, XX 01, 00 STALL Set Interface X000 0001 0B XX, XX XX, XX 00, 00 STALL Synch Frame 1000 0010 0C 00, 00 XX, XX 02, 00 STALL Unsupported [1] [2] [3] Device address: 0 to 127. Returned value in bytes. MSB specifies endpoint direction: 0 = OUT, 1 = IN. The ISP1122A accepts either value. 9.2 Hub specific requests In Table 8 the supported hub specific requests are listed, as well as some unsupported requests. Table 9 provides the feature selectors for setting or clearing port features. Table 8: Hub specific requests Request name bmRequestType byte 0 [7:0] (Bin) bRequest byte 1 (Hex) wValue byte 2, 3 (Hex) wIndex byte 4, 5 (Hex) wLength byte 6, 7 (Hex) Data 1010 0000 06 00, 00/29 [1] 00, 00 length [2], 00 hub descriptor Clear Hub Feature (C_LOCAL_POWER) X010 0000 01 00, 00 00, 00 00, 00 none Clear Port Feature (feature selectors) X010 0011 01 feature [3], 00 port [4], 00 00, 00 none Set Port Feature (feature selectors) X010 0011 03 feature [3], 00 port [4], 00 00, 00 none Descriptor Get Hub Descriptor Feature (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 13 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 8: Hub specific requests...continued Request name bmRequestType byte 0 [7:0] (Bin) bRequest byte 1 (Hex) wValue byte 2, 3 (Hex) wIndex byte 4, 5 (Hex) wLength byte 6, 7 (Hex) Data Get Hub Status 1010 0000 00 00, 00 00, 00 04, 00 hub status and status change field Get Port Status 1010 0011 00 00, 00 port [4], 00 04, 00 port status Get Bus Status 1010 0011 02 00, 00 port [4], 00 01, 00 STALL Clear Hub Feature (C_OVER_CURRENT) X010 0000 01 01, 00 00, 00 00, 00 STALL Set Hub Descriptor 0010 0000 07 XX, XX 00, 00 3E, 00 STALL Set Hub Feature (C_LOCAL_POWER) X010 0000 03 00, 00 00, 00 00, 00 STALL Set Hub Feature (C_OVER_CURRENT) X010 0000 03 01, 00 00, 00 00, 00 STALL Status Unsupported [1] [2] [3] [4] USB Specification Rev. 1.0 uses 00H, USB Specification Rev. 1.1 specifies 29H. Returned value in bytes. Feature selector value, see Table 9. Downstream port identifier: 1 to N with N = number of enabled ports (2 to 5). Table 9: Port feature selectors Feature selector name Value (Hex) Set feature Clear feature PORT_CONNECTION 00 not used not used PORT_ENABLE 01 not used disables a port PORT_SUSPEND 02 suspends a port resumes a port PORT_OVERCURRENT 03 not used not used PORT_RESET 04 resets and enables a port not used PORT_POWER 08 powers on a port powers off a port PORT_LOW_SPEED 09 not used not used C_PORT_CONNECTION 10 not used clears port connection change bit C_PORT_ENABLE 11 not used clears port enable change bit C_PORT_SUSPEND 12 not used clears port suspend change bit C_PORT_OVERCURRENT 13 not used clears port overcurrent change bit C_PORT_RESET 14 not used clears port reset change bit (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 14 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 9.3 Descriptors The ISP1122A hub controller supports the following standard USB descriptors: * * * * * * Device Configuration Interface Endpoint Hub String. Table 10: Device descriptor Values in square brackets are optional. Offset (bytes) Field name Size (bytes) Value (Hex) Comments 0 bLength 1 12 descriptor length = 18 bytes 1 bDescriptorType 1 01 type = DEVICE 2 bcdUSB 2 10, 01 USB Specification Rev. 1.1 4 bDeviceClass 1 09 HUB_CLASSCODE 5 bDeviceSubClass 1 00 - 6 bDeviceProtocol 1 00 - 7 bMaxPacketSize0 1 40 packet size = 64 bytes 8 idVendor 2 CC, 04 Philips Semiconductors vendor ID (04CC); can be customized using an external EEPROM (see Table 23) 10 idProduct 2 22, 11 ISP1122A product ID; can be customized using an external EEPROM (see Table 23) 12 bcdDevice 2 01, 01 device release 1.1; silicon revision increments this value 14 iManufacturer 1 00 no manufacturer string (default) [01] manufacturer string enabled (using an external EEPROM) 00 no product string (default) [02] product string enabled (using an external EEPROM) 15 iProduct 1 16 iSerialNumber 1 00 no serial number string 17 bNumConfigurations 1 01 one configuration (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 15 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 11: Configuration descriptor Values in square brackets are optional. Offset (bytes) Field name Size (bytes) Value (Hex) Comments 0 bLength 1 09 descriptor length = 9 bytes 1 bDescriptorType 1 02 type = CONFIGURATION 2 wTotalLength 2 19, 00 total length of configuration, interface and endpoint descriptors (25 bytes) 4 bNumInterfaces 1 01 one interface 5 bConfigurationValue 1 01 configuration value = 1 6 iConfiguration 1 00 no configuration string 7 bmAttributes 1 E0 self-powered with remote wake-up [1] A0 bus-powered with remote wake-up [1] 32 100 mA (default) [00] 0 mA (using an external EEPROM) [FA] 500 mA (using an external EEPROM) MaxPower [2] 8 [1] [2] 1 Selected by input SP/BP. Value in units of 2 mA. Table 12: Interface descriptor Offset (bytes) Field name Size (bytes) Value (Hex) Comments 0 bLength 1 09 descriptor length = 9 bytes 1 bDescriptorType 1 04 type = INTERFACE 2 bInterfaceNumber 1 00 - 3 bAlternateSetting 1 01 no alternate setting 4 bNumEndpoints 1 01 status change (interrupt) endpoint 5 bInterfaceClass 1 09 HUB_CLASSCODE 6 bInterfaceSubClass 1 00 - 7 bInterfaceProtocol 1 00 no class-specific protocol 8 bInterface 1 00 no interface string Table 13: Endpoint descriptor Offset (bytes) Field name Size (bytes) Value (Hex) Comments 0 bLength 1 07 descriptor length = 7 bytes 1 bDescriptorType 1 05 type = ENDPOINT 2 bEndpointAddress 1 81 endpoint 1, direction: IN 3 bmAttributes 1 03 interrupt endpoint 4 wMaxPacketSize 2 01, 00 packet size = 1 byte 6 bInterval 1 FF polling interval (255 ms) (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 16 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 14: Hub descriptor Values in square brackets are optional. Offset (bytes) Field name Size (bytes) Value (Hex) Comments 0 bDescLength 1 09 descriptor length = 9 bytes 1 bDescriptorType 1 29 type = HUB 2 bNbrPorts 1 05 to 02 number of enabled downstream ports; selectable by DP/DM strapping 3 wHubCharacteristics 2 09, 00 individual power switching [1], overcurrent protection active (modes 0, 1, 3, 4, 5, 7) 11, 00 individual power switching [1], no overcurrent protection (modes 2, 6) [2] 32 100 ms (default; modes 0, 1, 2, 4, 5, 6) 00 0 ms (default; modes 3, 7) [FA] 500 ms (using an external EEPROM; modes 0, 1, 2, 4, 5, 6); see Table 23 bPwrOn2PwrGood [3] 5 1 6 bHubContrCurrent 1 64 maximum hub controller current (100 mA) 7 DeviceRemovable 1 00 all devices removable 8 PortPwrCtrlMask 1 FF must be all ones for compatibility with USB Specification Rev. 1.0 [1] [2] [3] ISP1122A always reports power management status on an individual basis, even for ganged/global modes. This is compliant with USB Specification Rev. 1.1. Condition with no overcurrent detection is reported to the host. Value in units of 2 ms. Table 15: String descriptors String descriptors are optional and therefore disabled by default; they can be enabled through an external EEPROM. Offset (bytes) Field name Size (bytes) Value (Hex) Comments String descriptor (0): language ID string 0 bLength 1 04 descriptor length = 4 bytes 1 bDescriptorType 1 03 type = STRING 2 bString 2 09, 04 LANGID code zero String descriptor (1): manufacturer string 0 bLength 1 2E descriptor length = 46 bytes 1 bDescriptorType 1 03 type = STRING 44 UC [1] "Philips Semiconductors" 2 bString String descriptor (2): product string 0 bLength 1 10 descriptor length = 16 bytes 1 bDescriptorType 1 03 type = STRING 14 UC [1] "ISP1122" 2 [1] bString Unicode encoded string. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 17 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 9.4 Hub responses This section describes the hub responses to requests from the USB host. 9.4.1 Get device status The hub returns 2 bytes, see Table 16. Table 16: Get device status response Bit # Function Value Description 0 self-powered 0 bus-powered 1 self-powered 1 2 to 15 9.4.2 remote wake-up reserved 0 no remote wake-up 1 remote wake-up enabled 0 - Get configuration The hub returns 1 byte, see Table 17. Table 17: Get configuration response Bit # Function Value Description 0 configuration value 0 device not configured 1 device configured 0 - 1 to 7 9.4.3 reserved Get interface status The hub returns 2 bytes, see Table 18. Table 18: Get interface status response 9.4.4 Bit # Function Value Description 0 to 15 reserved 0 - Get hub status The hub returns 4 bytes, see Table 19. Table 19: Get hub status response Bit # Function Value Description 0 local power source 0 local power supply good 1 local power supply lost no overcurrent condition 1 overcurrent indicator 0 1 hub overcurrent condition detected 2 to 15 reserved 0 - 16 local power status change 0 no change in local power status 1 local power status changed 17 18 to 31 overcurrent indicator change 0 reserved overcurrent condition changed 0 - (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification no change in overcurrent condition 1 Rev. 02 -- 6 June 2000 18 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 9.4.5 Get port status The hub returns 4 bytes. The first 2 bytes contain the port status bits (wPortStatus, see Table 20). The last 2 bytes hold the port status change bits (wPortChange, see Table 21). Table 20: Get port status response (wPortStatus) Bit # Function Value Description 0 current connect status 0 no device present 1 device present on this port 0 port disabled 1 port enabled 0 port not suspended 1 port suspended 0 no overcurrent condition 1 overcurrent condition detected 0 reset not asserted 1 reset asserted 1 2 3 4 port enabled/disabled suspend overcurrent indicator reset 5 to 7 reserved 0 - 8 port power 0 port powered off 1 port power on full-speed device attached 9 low-speed device attached 0 1 low-speed device attached 10 to 15 reserved 0 - Table 21: Get port status response (wPortChange) Bit # Function Value Description 0 connect status change 0 no change in current connect status 1 current connect status changed 1 port enabled/disabled change 0 no port error 1 port disabled by a port error 2 suspend change 0 no change in suspend status 1 resume complete 3 overcurrent indicator change 0 4 reset change 5 to 15 reserved 1 overcurrent indicator changed 0 no change in reset status 1 reset complete 0 - (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification no change in overcurrent status Rev. 02 -- 6 June 2000 19 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 9.4.6 Get configuration descriptor The hub returns 25 bytes containing the configuration descriptor (9 bytes, see Table 11), the interface descriptor (9 bytes, see Table 12) and the endpoint descriptor (7 bytes, see Table 13). 9.4.7 Get device descriptor The hub returns 18 bytes containing the device descriptor, see Table 10. 9.4.8 Get hub descriptor The hub returns 9 bytes containing the hub descriptor, see Table 14. 9.4.9 Get string descriptor (0) The hub returns 4 bytes containing the language ID, see Table 15. 9.4.10 Get string descriptor (1) The hub returns 46 bytes containing the manufacturer name, see Table 15. 9.4.11 Get string descriptor (2) The hub returns 16 bytes containing the product name, see Table 15. 10. I2C-bus interface A simple I2C-bus interface is provided in the ISP1122A to read customized vendor ID, product ID and some other configuration bits from an external EEPROM. The interface supports single master operation at a nominal bus speed of 93.75 kHz. The I2C-bus interface is intended for bidirectional communication between ICs via two serial bus wires, SDA (data) and SCL (clock). Both lines are driven by open-drain circuits and must be connected to the positive supply voltage via pull-up resistors. 10.1 Protocol The I2C-bus protocol defines the following conditions: * * * * Bus free: both SDA and SCL are HIGH START: a HIGH-to-LOW transition on SDA, while SCL is HIGH STOP: a LOW-to-HIGH transition on SDA, while SCL is HIGH Data valid: after a START condition, data on SDA are stable during the HIGH period of SCL; data on SDA may only change while SCL is LOW. Each device on the I2C-bus has a unique slave address, which the master uses to select a device for access. The master starts a data transfer using a START condition and ends it by generating a STOP condition. Transfers can only be initiated when the bus is free. The receiver must acknowledge each byte by means of a LOW level on SDA during the ninth clock pulse on SCL. For detailed information please consult The I2C-bus and how to use it., order number 9398 393 40011. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 20 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 10.2 Hardware connections Via the I2C-bus interface the ISP1122A can be connected to an external EEPROM (PCF8582 or equivalent). The hardware connections are shown in Figure 5. The SCL and SDA pins are multiplexed with pins OPTION and INDV respectively. VDD idth VDD RP RP OPTION/SCL INDV/SDA SCL A0 SDA A1 I2C-bus PCF8582 A2 ISP1122A EEPROM or equivalent USB HUB MBL166 Fig 5. EEPROM connection diagram. The slave address which ISP1122A uses to access the EEPROM is 1010000B. Page mode addressing is not supported, so pins A0, A1 and A2 of the EEPROM must be connected to GND (logic 0). 10.3 Data transfer When the ISP1122A is reset, the I2C-bus interface tries to read 6 bytes of configuration data from an external EEPROM. If no response is detected, the levels on inputs SDA and SCL are interpreted as INDV and OPTION to select the operating mode (see Table 4). The data in the EEPROM memory are organized as shown in Table 22. Table 22: EEPROM organization Address (Hex) Default value (Hex) Contents 00 CC idVendor [1] (lower byte) 01 04 idVendor [1] (upper byte) 02 22 idProduct [2] (lower byte) 03 11 idProduct [2] (upper byte) 04 - configuration bits C7 to C0; see Table 23 05 AA signature [1] [2] Vendor ID code in the Device descriptor, see Table 10. Product ID code in the Device descriptor, see Table 10. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 21 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 23: Configuration bits Bit Function Value (Bin) C0 OPTION see Table 4 "Mode selection" C1 INDV see Table 4 "Mode selection" C2 reserved 0 [1] must always be programmed to logic 0 C3 PwrOn2PwrGood [2] 0 [1] 100 ms (bPwrOn2PwrGood = 32H) 1 500 ms (bPwrOn2PwrGood = FAH) 0 [1] string descriptors disabled 1 string descriptors enabled (strings: "Philips Semiconductors", "ISP1122") 0 internal analog overcurrent detection circuit disabled; overcurrent pins OCn function as digital inputs (TTL level) 1 [1] internal analog overcurrent detection circuit enabled 00 [1] 100 mA (MaxPower = 32H) 1X 500 mA (MaxPower = FAH) 01 0 mA (MaxPower = 00H) C4 string descriptor enable C5 internal analog overcurrent detection enable C7, C6 [1] [2] [3] MaxPower [3] Description Default value at reset if no external EEPROM is present. Modifies the Hub Descriptor field `bPwrOn2PwrGood', see Table 14. Modifies the Hub Descriptor field `MaxPower', see Table 14. 11. Hub power modes USB hubs can either be self-powered or bus-powered. Self-powered -- Self-powered hubs have a 5 V local power supply on board which provide power to the hub and the downstream ports. The USB Specification Rev. 1.1 requires that these hubs limit the current to 500 mA per downstream port and report overcurrent conditions to the host. The hub may optionally draw 100 mA from the USB supply (VBUS) to power the interface functions (hybrid-powered). Bus-powered -- Bus-powered hubs obtain all power from the host or an upstream self-powered hub. The maximum current is 100 mA per downstream port. Current limiting and reporting of overcurrent conditions are both optional. Power switching of downstream ports can be done individually or ganged, where all ports are switched simultaneously with one power switch. The ISP1122A supports both modes, which can be selected using input INDV (see Table 4). 11.1 Voltage drop requirements 11.1.1 Self-powered hubs Self-powered hubs are required to provide a minimum of 4.75 V to its output port connectors at all legal load conditions. To comply with Underwriters Laboratory Inc. (UL) safety requirements, the power from any port must be limited to 25 W (5 A at 5 V). Overcurrent protection may be implemented on a global or individual basis. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 22 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Assuming a 5 V 3% power supply the worst case supply voltage is 4.85 V. This only allows a voltage drop of 100 mV across the hub printed-circuit board (PCB) to each downstream connector. This includes a voltage drop across: * * * * Power supply connector Hub PCB (power and ground traces, ferrite beads) Power switch (FET on-resistance) Overcurrent sense device. PCB resistance and power supply connector resistance may cause a drop of 25 mV, leaving only 75 mV as the voltage drop allowed across the power switch and overcurrent sense device. The individual voltage drop components are shown in Figure 6. 5V + POWER SUPPLY 3% regulated - voltage drop 75 mV 4.85 V(min) voltage drop 25 mV low-ohmic PMOS switch 4.75 V(min) hub board (1) resistance ISP1122A power switch VBUS D+ downstream port connector D- GND SHIELD 04aa03 (1) Includes PCB traces, ferrite beads, etc. Fig 6. Typical voltage drop components in self-powered mode using individual overcurrent detection. In case of global overcurrent detection an increased voltage drop is needed for the overcurrent sense device (in this case a low-ohmic resistor). This can be realized by using a special power supply of 5.1 V 3%, as shown in Figure 7. 5.1 V KICK-UP + POWER SUPPLY 3% regulated - voltage drop 75 mV voltage drop 4.95 V(min) 100 mV low-ohmic sense resistor for overcurrent detection low-ohmic PMOS switch voltage drop 25 mV 4.75 V(min) hub board (1) resistance ISP1122A power switch VBUS D+ downstream port connector D- GND SHIELD 04aa05 (1) Includes PCB traces, ferrite beads, etc. Fig 7. Typical voltage drop components in self-powered mode using global overcurrent detection. 11.1.2 Bus-powered hubs Bus-powered hubs are guaranteed to receive a supply voltage of 4.5 V at the upstream port connector and must provide a minimum of 4.4 V to the downstream port connectors. The voltage drop of 100 mV across bus-powered hubs includes: * Hub PCB (power and ground traces, ferrite beads) * Power switch (FET on-resistance) * Overcurrent sense device. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 23 of 48 ISP1122A Philips Semiconductors USB stand-alone hub The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power switch and overcurrent sense device. The voltage drop components are shown in Figure 8. For bus-powered hubs overcurrent protection is optional. It may be implemented for all downstream ports on a global or individual basis. VBUS D+ upstream port connector voltage drop 75 mV 4.50 V(min) low-ohmic PMOS switch D- voltage drop 25 mV hub board (1) resistance ISP1122A power switch GND SHIELD 4.40 V(min) VBUS D+ downstream port connector D- GND SHIELD 04aa06 (1) Includes PCB traces, ferrite beads, etc. Fig 8. Typical voltage drop components in bus-powered mode (no overcurrent detection). 12. Overcurrent detection The ISP1122A has an analog overcurrent detection circuit for monitoring downstream port lines. This circuit automatically reports an overcurrent condition to the host and turns off the power to the faulty port. The host must reset the condition flag. Pins OC1 to OC5/GOC are used for individual port overcurrent detection. Pin OC5/GOC can also be used for global overcurrent detection. This is controlled by input INDV (see Table 4). The overcurrent detection circuit can be switched off using an external EEPROM (see Table 23). In this case, the overcurrent pins OCn function as logic inputs (TTL level). 12.1 Overcurrent circuit description The integrated overcurrent detection circuit of ISP1122A senses the voltage drop across the power switch or an extra low-ohmic sense resistor. When the port draws too much current, the voltage drop across the power switch exceeds the trip voltage threshold (Vtrip). The overcurrent circuit detects this and switches off the power switch control signal after a delay of 15 ms (ttrip). This delay acts as a `debounce' period to minimize false tripping, especially during the inrush current produced by `hot plugging' of a USB device. 12.2 Power switch selection From the voltage drop analysis given in Figure 6, Figure 7 and Figure 8, the power switch has a voltage drop budget of 75 mV. For individual self-powered mode, the current drawn per port can be up to 500 mA. Thus the power switch should have maximum on-resistance of 150 m. If the voltage drop due to the hub board resistance can be minimized, the power switch can have more voltage drop budget and therefore a higher on-resistance. Power switches with a typical on-resistance of around 100 m fit into this application. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 24 of 48 ISP1122A Philips Semiconductors USB stand-alone hub The ISP1122A overcurrent detection circuit has been designed with a nominal trip voltage (Vtrip) of 85 mV. This gives a typical trip current of approximately 850 mA for a power switch with an on-resistance of 100 m1. 12.3 Tuning the overcurrent trip voltage The ISP1122A trip voltage can optionally be adjusted through external components to set the desired trip current. This is done by inserting tuning resistors at pins SP/BP or OCn (see Figure 9). Rtu tunes up the trip voltage Vtrip and Rtd tunes it down according to Equation 1. V trip = V trip ( intrinsic ) + I ref R tu - I OC R td (1) with Iref(nom) = 5 A and IOC(nom) = 0.5 A. low-ohmic PMOS switch handbook, halfpage low-ohmic PMOS switch handbook, halfpage VCC VBUS Iref IOC Rtu VCC IOC Rtd Rtd SP/BP VCC OCn ISP1122A SP/BP OCn ISP1122A MBL167 MBL168 Iref(nom) = 5 A IOC(nom) = 0.5 A IOC(nom) = 0.5 A a. Self-powered mode. b. Bus-powered mode. Fig 9. Tuning the overcurrent trip voltage. 12.4 Reference circuits Some typical examples of port power switching and overcurrent detection modes are given in Figure 10 to Figure 13. The RC circuit (47 k and 0.1 F) around the PMOS switch provides for soft turn-on. The series resistor connecting the SP/BP pin to VCC tunes up the overcurrent trip voltage slightly (see Figure 9). In the schematic diagram the resistor separates the net names for pins VCC and SP/BP. This allows an automatic router to use a wide trace for VCC and a narrow trace to connect pin SP/BP. 1. The following PMOS power switches have been tested to work well with the ISP1122A: Philips PHP109, Vishay Siliconix Si2301DS, Fairchild FDN338P. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 25 of 48 ISP1122A Philips Semiconductors USB stand-alone hub downstream ports handbook, full pagewidth 5V + POWER SUPPLY - 3% low-ohmic PMOS switch +4.85 V(min) 1 0.1 F ferrite bead 120 F 47 k VBUS +4.75 V (min) D+ D- 1 GND SHIELD low-ohmic PMOS switch 330 k (5x) 2 0.1 F ferrite bead 120 F 47 k VBUS +4.75 V (min) D+ D- 2 GND SHIELD low-ohmic PMOS switch +4.85 V(min) VCC PSW1/GL1 GND PSW2/GL2 3 0.1 F ferrite bead 120 F 47 k VBUS +4.75 V (min) D+ D- 3 GND PSW3/GL3 SHIELD 100 to 1 k PSW4/GL4 low-ohmic PMOS switch PSW5/GL5/GPSW 4 0.1 F ferrite bead 120 F 47 k INDV VBUS +4.75 V (min) D+ D- 4 GND SHIELD SP/BP low-ohmic PMOS switch OPTION 0.1 F ISP1122A 5 47 k ferrite bead 120 F VBUS +4.75 V (min) D+ D- 5 GND SHIELD OC1 MBL170 OC2 OC3 OC4 OC5/GOC Power switches 1 to 5 are low-ohmic PMOS devices as specified in Section 12.2. Fig 10. Mode 5: self-powered hub; individual port power switching; individual overcurrent detection. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 26 of 48 ISP1122A Philips Semiconductors USB stand-alone hub downstream ports handbook, full pagewidth 5.1 V KICK-UP + POWER SUPPLY - 3% ferrite bead +4.95 V(min) low-ohmic sense resistor for overcurrent detection 330 k +4.95 V(min) VCC PSW1/GL1 PSW2/GL2 low-ohmic PMOS switch PSW3/GL3 PSW4/GL4 VBUS +4.75 V (min) D+ D- 1 GND SHIELD ferrite bead GND 100 to 1 k 120 F 120 F VBUS +4.75 V (min) D+ D- 2 GND SHIELD 0.1 F 47 k ferrite bead PSW5/GL5/GPSW 120 F VBUS +4.75 V (min) D+ D- 3 GND INDV SHIELD SP/BP ferrite bead OPTION 120 F ISP1122A VBUS +4.75 V (min) D+ D- 4 GND OC1 SHIELD OC2 ferrite bead OC3 120 F OC4 OC5/GOC VBUS +4.75 V (min) D+ D- 5 GND SHIELD MBL171 Power switch is low-ohmic PMOS device as specified in Section 12.2. Fig 11. Mode 1: self-powered hub; ganged port power switching; global overcurrent detection. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 27 of 48 ISP1122A Philips Semiconductors USB stand-alone hub handbook, full pagewidth upstream port VBUS D+ low-ohmic PMOS switch +4.50 V(min) 1 0.1 F D- 120 F 47 k GND VBUS +4.40 V (min) D+ D- SHIELD low-ohmic PMOS switch PSW1/GL1 2 0.1 F ferrite bead 120 F 47 k VBUS +4.40 V (min) D+ D- 2 GND PSW2/GL2 GND 1 GND 330 k (4x) SHIELD VCC downstream ports ferrite bead SHIELD PSW3/GL3 low-ohmic PMOS switch PSW4/GL4 PSW5/GL5/GPSW 3 0.1 F ferrite bead 120 F 47 k VBUS +4.40 V (min) D+ D- 3 GND SHIELD INDV low-ohmic PMOS switch ferrite bead SP/BP 0.1 F OPTION 4 47 k ISP1122A 120 F VBUS +4.40 V (min) D+ D- 4 GND SHIELD MBL172 OC1 OC2 OC3 OC4 OC5/GOC Power switches 1 to 4 are low-ohmic PMOS devices as specified in Section 12.2. Fig 12. Mode 4: bus-powered hub; individual port power switching; individual overcurrent detection. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 28 of 48 ISP1122A Philips Semiconductors USB stand-alone hub handbook, full pagewidth upstream port VBUS D+ downstream ports ferrite bead +4.50 V(min) 120 F D- VBUS +4.40 V (min) D+ D- GND 1 GND SHIELD SHIELD 330 k VCC PSW1/GL1 GND PSW2/GL2 ferrite bead 120 F VBUS +4.40 V (min) D+ D- 2 GND low-ohmic PMOS switch SHIELD PSW3/GL3 PSW4/GL4 0.1 F 47 k PSW5/GL5/GPSW ferrite bead 120 F VBUS +4.40 V (min) D+ D- 3 GND INDV SHIELD SP/BP ferrite bead OPTION 120 F ISP1122A VBUS +4.40 V (min) D+ D- 4 GND SHIELD MBL173 OC1 OC2 OC3 OC4 OC5/GOC Power switch is low-ohmic PMOS device as specified in Section 12.2. Fig 13. Mode 0: bus-powered hub; ganged port power switching; global overcurrent detection. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 29 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 13. Limiting values Table 24: Absolute maximum ratings In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VCC supply voltage VI input voltage Ilatchup latchup current VI < 0 or VI > VCC Vesd electrostatic discharge voltage ILI < 15 A Tstg Ptot [1] [2] [3] Conditions Min Max Unit -0.5 +6.0 V -0.5 VCC + 0.5 V - 200 mA - 4000 [3] V storage temperature -60 +150 C total power dissipation - 95 mW [1] [2] Equivalent to discharging a 100 pF capacitor via a 1.5 k resistor (Human Body Model). Values are given for device only; in-circuit Vesd(max) = 8000 V. For open-drain pins Vesd(max) = 2000 V. Table 25: Recommended operating conditions Symbol Parameter VCC Conditions Min Max Unit supply voltage 4.0 5.5 V VI input voltage 0 5.5 V VI(AI/O) input voltage on analog I/O pins (D+/D-) 0 3.6 V VO(od) open-drain output pull-up voltage 0 5.5 V Tamb operating ambient temperature -40 +85 C (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 30 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 14. Static characteristics Table 26: Static characteristics; supply pins VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Vreg(3.3) Parameter regulated supply voltage ICC operating supply current ICC(susp) suspend supply current [1] Conditions Min Typ Max Unit 3.0 [1] 3.3 3.6 V - 18 - mA 1.5 k pull-up on upstream port D+ (pin DP0) - - 270 A no pull-up on upstream port D+ (pin DP0) - - 80 A Min Typ Max Unit In `suspend' mode the minimum voltage is 2.7 V. Table 27: Static characteristics: digital pins VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Parameter Conditions Input levels VIL LOW-level input voltage - - 0.8 V VIH HIGH-level input voltage 2.0 - - V Schmitt trigger inputs Vth(LH) positive-going threshold voltage 1.4 - 1.9 V Vth(HL) negative-going threshold voltage 0.9 - 1.5 V Vhys hysteresis voltage 0.4 - 0.7 V IOL = 6 mA - - 0.4 V IOL = 20 A - - 0.1 V - - 1 A - - 1 A Min Typ Max Unit 65 85 105 mV Output levels LOW-level output voltage (open drain outputs) VOL Leakage current input leakage current ILI Open-drain outputs OFF-state output current IOZ Table 28: Static characteristics: overcurrent sense pins VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Vtrip [1] [2] Parameter Conditions overcurrent detection trip voltage on OCn pins V = VCC - VOCn [1] V = VSP/BP - VOCn [2] Bus-powered mode. Self-powered or hybrid-powered mode. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 31 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 29: Static characteristics: analog I/O pins (D+, D-) [1] VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VDI differential input sensitivity |VI(D+) - VI(D-)| 0.2 - - V VCM differential common mode voltage includes VDI range 0.8 - 2.5 V VIL LOW-level input voltage - - 0.8 V VIH HIGH-level input voltage 2.0 - - V Input levels Output levels VOL LOW-level output voltage RL = 1.5 k to +3.6V - - 0.3 V VOH HIGH-level output voltage RL = 15 k to GND 2.8 - 3.6 V - - 10 A Leakage current OFF-state leakage current ILZ Capacitance transceiver capacitance pin to GND - - 20 pF ZDRV [2] driver output impedance steady-state drive 28 - 44 ZINP input impedance 10 - - M termination voltage for upstream port pull-up (RPU) 3.0 [4] - 3.6 V Typ Max Unit CIN Resistance Termination VTERM [3] [1] [2] [3] [4] D+ is the USB positive data pin (DPn); D- is the USB negative data pin (DMn). Includes external resistors of 20 1% on both D+ and D-. This voltage is available at pin Vreg(3.3). In `suspend' mode the minimum voltage is 2.7 V. 15. Dynamic characteristics Table 30: Dynamic characteristics VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Parameter Conditions Min Reset tW(RESET) pulse width on input RESET crystal oscillator running 10 - - s crystal oscillator stopped - 2 [1] - ms - 6 - MHz Crystal oscillator fXTAL [1] crystal frequency Dependent on the crystal oscillator start-up time. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 32 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 31: Dynamic characteristics: overcurrent sense pins VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; unless otherwise specified. Symbol Conditions Min Typ Max Unit - - 15 ms [1] overcurrent trip response time see Figure 14 from OCn LOW to PSWn HIGH ttrip [1] Parameter Operating modes 0, 1, 4 and 5; see Table 4. Table 32: Dynamic characteristics: analog I/O pins (D+, D-); full-speed mode [1] VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; CL = 50 pF; RPU = 1.5 k on D+ to VTERM.; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Driver characteristics tFR rise time CL = 50 pF; 10 to 90% of |VOH - VOL| 4 - 20 ns tFF fall time CL = 50 pF; 10 to 90% of |VOH - VOL| 4 - 20 ns FRFM differential rise/fall time matching (tFR/tFF) 90 - 111.11 % VCRS output signal crossover voltage [2] [3] 1.3 - 2.0 V [2] Data source timing tDJ1 source differential jitter for consecutive transitions see Figure 15 [2] [3] -3.5 - +3.5 ns tDJ2 source differential jitter for paired transitions see Figure 15 [2] [3] -4 - +4 ns tFEOPT source EOP width see Figure 16 [3] 160 - 175 ns source differential data-to-EOP see Figure 16 transition skew [3] -2 - +5 ns tFDEOP Receiver timing tJR1 receiver data jitter tolerance for see Figure 17 consecutive transitions [3] -18.5 - +18.5 ns tJR2 receiver data jitter tolerance for see Figure 17 paired transitions [3] -9 - +9 ns tFEOPR receiver SE0 width [3] 82 - - ns tFST width of SE0 during differential rejected as EOP; transition see Figure 18 [3] - - 14 ns accepted as EOP; see Figure 16 Hub timing (downstream ports configured as full-speed) tFHDD hub differential data delay (without cable) see Figure 19; CL = 0 pF [3] - - 44 ns tFSOP data bit width distortion after SOP see Figure 19 [3] -5 - +5 ns tFEOPD hub EOP delay relative to tHDD see Figure 20 [3] 0 - 15 ns hub EOP output width skew [3] -15 - +15 ns tFHESK [1] [2] [3] see Figure 20 Test circuit: see Figure 22. Excluding the first transition from Idle state. Characterized only, not tested. Limits guaranteed by design. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 33 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Table 33: Dynamic characteristics: analog I/O pins (D+, D-); low-speed mode [1] VCC = 4.0 to 5.5 V; VGND = 0 V; Tamb = -40 to +85 C; CL = 50 pF; RPU = 1.5 k on D- to VTERM; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Driver characteristics tLR rise time CL = 200 to 600 pF; 10 to 90% of |VOH - VOL| 75 - 300 ns tLF fall time CL = 200 to 600 pF; 10 to 90% of |VOH - VOL| 75 - 300 ns LRFM differential rise/fall time matching (tLR/tLF) 80 - 125 % VCRS output signal crossover voltage 1.3 - 2.0 V [2] [2] [3] Hub timing (downstream ports configured as low-speed) tLHDD hub differential data delay see Figure 19 - - 300 ns tLSOP data bit width distortion after SOP see Figure 19 [3] -60 - +60 ns tLEOPD hub EOP delay relative to tHDD see Figure 20 [3] 0 - 200 ns hub EOP output width skew [3] -300 - +300 ns tLHESK [1] [2] [3] see Figure 20 Test circuit: see Figure 22. Excluding the first transition from Idle state. Characterized only, not tested. Limits guaranteed by design. VCC Vtrip overcurrent input 0V ttrip VCC power switch output MBL032 0V Overcurrent input: OCn; power switch output: PSWn. Reference voltage for overcurrent sensing: VCC (bus-powered mode) or VSP/BP (self-powered mode). Fig 14. Overcurrent trip response timing. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 34 of 48 ISP1122A Philips Semiconductors USB stand-alone hub TPERIOD +3.3 V crossover point crossover point crossover point differential data lines 0V MGR870 consecutive transitions N x TPERIOD + t DJ1 paired transitions N x TPERIOD + t DJ2 TPERIOD is the bit duration corresponding with the USB data rate. Fig 15. Source differential data jitter. TPERIOD +3.3 V crossover point extended crossover point differential data lines 0V differential data to SE0/EOP skew N x TPERIOD + t DEOP source EOP width: t EOPT receiver EOP width: t EOPR MGR776 TPERIOD is the bit duration corresponding with the USB data rate. Full-speed timing symbols have a subscript prefix `F', low-speed timings a prefix `L'. Fig 16. Source differential data-to-EOP transition skew and EOP width. TPERIOD +3.3 V differential data lines 0V tJR tJR1 tJR2 MGR871 consecutive transitions N x TPERIOD + t JR1 paired transitions N x TPERIOD + t JR2 TPERIOD is the bit duration corresponding with the USB data rate. Fig 17. Receiver differential data jitter. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 35 of 48 ISP1122A Philips Semiconductors USB stand-alone hub tFST +3.3 V VIH(min) differential data lines 0V MGR872 Fig 18. Receiver SE0 width tolerance. +3.3 V upstream differential data lines crossover point crossover point downstream differential data 0V hub delay downstream t HDD hub delay upstream t HDD +3.3 V downstream differential data lines crossover point crossover point upstream differential data 0V MGR777 (A) downstream hub delay (B) upstream hub delay SOP distortion: t SOP = t HDD (next J) - t HDD(SOP) Full-speed timing symbols have a subscript prefix `F', low-speed timings a prefix `L'. Fig 19. Hub differential data delay and SOP distortion. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 36 of 48 ISP1122A Philips Semiconductors USB stand-alone hub +3.3 V crossover point extended upstream differential data lines crossover point extended downstream port 0V t EOP- t EOP+ t EOP+ t EOP- +3.3 V crossover point extended downstream differential data lines crossover point extended upstream end of cable 0V MGR778 (A) downstream EOP delay (B) upstream EOP delay EOP delay: t EOP = max (t EOP-, tEOP+) EOP delay relative to t HDD: t EOPD = t EOP - t HDD EOP skew: t HESK = t EOP+ - t EOP- Full-speed timing symbols have a subscript prefix `F', low-speed timings a prefix `L'. Fig 20. Hub EOP delay and EOP skew. Table 34: Dynamic characteristics: I2C-bus pins (SDA, SCL) VCC and Tamb within recommended operating range; VDD = +5 V; VSS = VGND ; VIL and VIH between VSS and VDD. Symbol Parameter Conditions Min Typ Max Unit fSCL SCL clock frequency fXTAL = 6 MHz 0 93.75 [1] 100 kHz tBUF bus free time 4.7 - - s tSU;STA START condition set-up time 250 - - ns tHD;STA hold time START condition 4.0 - - s tLOW SCL LOW time 4.7 - - s tHIGH SCL HIGH time 4.0 - - s - - 1000 ns tr SCL and SDA rise time [2] tf SCL and SDA fall time - - 300 ns tSU;DAT data set-up time 250 - - ns tHD;DAT data hold time 0 - - s tVD;DAT SCL LOW to data out valid time - - 0.4 s tSU;STO STOP condition set-up time 4.0 - - s Cb capacitive load for each bus line - - 400 pF [1] [2] fSCL = 164fXTAL. Rise time is determined by Cb and pull-up resistor value Rp (typ. 4.7 k). (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 37 of 48 ISP1122A Philips Semiconductors USB stand-alone hub SDA t LOW t BUF tr tf t HD;STA SCL P S P t SU;STA t SU;STO S t HD;STA t HD;STA t HIGH t SU;DAT MGR779 Fig 21. I2C-bus timing. 16. Test information The dynamic characteristics of the analog I/O ports (D+ and D-) as listed in Table 32 and Table 33, were determined using the circuit shown in Figure 22. Vreg(3.3) RPU test point 20 S1 1.5 k D.U.T. 15 k CL test S1 D-/LS closed D+/LS open D-/FS open D+/FS closed MGR775 Load capacitance: CL = 50 pF (full-speed mode) CL = 200 pF or 600 pF (low-speed mode, minimum or maximum timing). Speed selection: full-speed mode (FS): 1.5 k pull-up resistor on D+ low-speed mode (LS): 1.5 k pull-up resistor on D-. Fig 22. Load impedance for D+ and D- pins. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 38 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 17. Package outline SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 D E A X c y HE v M A Z 17 32 Q A2 A (A 3) A1 pin 1 index Lp L 16 1 0 detail X w M bp e 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 2.65 0.3 0.1 2.45 2.25 0.25 0.49 0.36 0.27 0.18 20.7 20.3 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.2 1.0 0.25 0.25 0.1 0.95 0.55 0.012 0.096 0.004 0.086 0.01 0.02 0.01 0.011 0.007 0.81 0.80 0.30 0.29 0.050 0.419 0.394 0.055 0.043 0.016 0.047 0.039 0.01 0.01 0.004 0.037 0.022 inches 0.10 o 8 0o Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC SOT287-1 JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE 97-05-22 99-12-27 MO-119 Fig 23. SO32 package outline. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 39 of 48 ISP1122A Philips Semiconductors USB stand-alone hub SDIP32: plastic shrink dual in-line package; 32 leads (400 mil) SOT232-1 ME seating plane D A2 A A1 L c e Z (e 1) w M b1 MH b 17 32 pin 1 index E 1 16 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 min. A2 max. b b1 c D (1) E (1) e e1 L ME MH w Z (1) max. mm 4.7 0.51 3.8 1.3 0.8 0.53 0.40 0.32 0.23 29.4 28.5 9.1 8.7 1.778 10.16 3.2 2.8 10.7 10.2 12.2 10.5 0.18 1.6 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-02-04 SOT232-1 Fig 24. SDIP32 package outline. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 40 of 48 ISP1122A Philips Semiconductors USB stand-alone hub LQFP32: plastic low profile quad flat package; 32 leads; body 7 x 7 x 1.4 mm SOT358-1 c y X 24 A 17 25 16 ZE e E HE A A2 A 1 (A 3) wM bp Lp L pin 1 index 32 9 detail X 1 8 e ZD v M A wM bp D B HD v M B 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HD HE L Lp v w y mm 1.60 0.20 0.05 1.45 1.35 0.25 0.4 0.3 0.18 0.12 7.1 6.9 7.1 6.9 0.8 9.15 8.85 9.15 8.85 1.0 0.75 0.45 0.2 0.25 0.1 Z D (1) Z E (1) 0.9 0.5 0.9 0.5 o 7 0o Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT358 -1 136E03 MS-026 EIAJ EUROPEAN PROJECTION ISSUE DATE 99-12-27 00-01-19 Fig 25. LQFP32 package outline. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 41 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 18. Soldering 18.1 Introduction This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages (document order number 9398 652 90011). There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mount components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mount ICs, or for printed-circuit boards with high population densities. In these situations reflow soldering is often used. 18.2 Surface mount packages 18.2.1 Reflow soldering Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several methods exist for reflowing; for example, infrared/convection heating in a conveyor type oven. Throughput times (preheating, soldering and cooling) vary between 100 and 200 seconds depending on heating method. Typical reflow peak temperatures range from 215 to 250 C. The top-surface temperature of the packages should preferable be kept below 230 C. 18.2.2 Wave soldering Conventional single wave soldering is not recommended for surface mount devices (SMDs) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems. To overcome these problems the double-wave soldering method was specifically developed. If wave soldering is used the following conditions must be observed for optimal results: * Use a double-wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave. * For packages with leads on two sides and a pitch (e): - larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; - smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves at the downstream end. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 42 of 48 ISP1122A Philips Semiconductors USB stand-alone hub * For packages with leads on four sides, the footprint must be placed at a 45 angle to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. 18.2.3 Manual soldering Fix the component by first soldering two diagonally-opposite end leads. Use a low voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C. 18.3 Through-hole mount packages 18.3.1 Soldering by dipping or by solder wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 18.3.2 Manual soldering Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 43 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 18.4 Package related soldering information Table 35: Suitability of IC packages for wave, reflow and dipping soldering methods Mounting Package Soldering method Reflow [1] Dipping Wave Through-hole mount DBS, DIP, HDIP, SDIP, SIL suitable [2] - suitable Surface mount BGA, LFBGA, SQFP, TFBGA not suitable suitable - HBCC, HLQFP, HSQFP, HSOP, HTQFP, HTSSOP, SMS not suitable [3] suitable - PLCC [4], SO, SOJ suitable LQFP, QFP, TQFP SSOP, TSSOP, VSO [1] [2] [3] [4] [5] [6] - not suitable - not recommended [6] suitable - All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink (at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version). If wave soldering is considered, then the package must be placed at a 45 angle to the solder wave direction. The package footprint must incorporate solder thieves downstream and at the side corners. Wave soldering is only suitable for LQFP, QFP and TQFP packages with a pitch (e) equal to or larger than 0.8 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification suitable recommended [4] [5] Rev. 02 -- 6 June 2000 44 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 19. Revision history Table 36: Revision history Rev Date CPCN Description 02 20000606 Product specification; second version. Supersedes ISP1122A-01 of 27 March 2000 (9397 750 06986). 01 20000327 Preliminary specification; initial version. (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 45 of 48 ISP1122A Philips Semiconductors USB stand-alone hub 20. Data sheet status Datasheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued data sheet before initiating or completing a design. 21. Definitions customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 23. Licenses Purchase of Philips I2C components 22. Disclaimers Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011. Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors 24. Trademarks ACPI -- is an open industry specification for PC power management, co-developed by Intel Corp., Microsoft Corp. and Toshiba SMBus -- is a bus specification for PC power management, developed by Intel Corp. based on the I2C-bus from Royal Philips Electronics GoodLink -- is a trademark of Royal Philips Electronics SoftConnect -- is a trademark of Royal Philips Electronics OnNow -- is a trademark of Microsoft Corp. (c) Philips Electronics N.V. 2000 All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 46 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Philips Semiconductors - a worldwide company Argentina: see South America Australia: Tel. +61 2 9704 8141, Fax. +61 2 9704 8139 Austria: Tel. +43 160 101, Fax. +43 160 101 1210 Belarus: Tel. +375 17 220 0733, Fax. +375 17 220 0773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Tel. +359 268 9211, Fax. +359 268 9102 Canada: Tel. +1 800 234 7381 China/Hong Kong: Tel. +852 2 319 7888, Fax. +852 2 319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Tel. +45 3 288 2636, Fax. +45 3 157 0044 Finland: Tel. +358 961 5800, Fax. +358 96 158 0920 France: Tel. +33 14 099 6161, Fax. +33 14 099 6427 Germany: Tel. +49 40 23 5360, Fax. +49 402 353 6300 Hungary: see Austria India: Tel. +91 22 493 8541, Fax. +91 22 493 8722 Indonesia: see Singapore Ireland: Tel. +353 17 64 0000, Fax. +353 17 64 0200 Israel: Tel. +972 36 45 0444, Fax. +972 36 49 1007 Italy: Tel. +39 039 203 6838, Fax +39 039 203 6800 Japan: Tel. +81 33 740 5130, Fax. +81 3 3740 5057 Korea: Tel. +82 27 09 1412, Fax. +82 27 09 1415 Malaysia: Tel. +60 37 50 5214, Fax. +60 37 57 4880 Mexico: Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Tel. +31 40 278 2785, Fax. +31 40 278 8399 New Zealand: Tel. +64 98 49 4160, Fax. +64 98 49 7811 Norway: Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Tel. +63 28 16 6380, Fax. +63 28 17 3474 Poland: Tel. +48 22 5710 000, Fax. +48 22 5710 001 Portugal: see Spain Romania: see Italy Russia: Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: Tel. +27 11 471 5401, Fax. +27 11 471 5398 South America: Tel. +55 11 821 2333, Fax. +55 11 829 1849 Spain: Tel. +34 33 01 6312, Fax. +34 33 01 4107 Sweden: Tel. +46 86 32 2000, Fax. +46 86 32 2745 Switzerland: Tel. +41 14 88 2686, Fax. +41 14 81 7730 Taiwan: Tel. +886 22 134 2865, Fax. +886 22 134 2874 Thailand: Tel. +66 27 45 4090, Fax. +66 23 98 0793 Turkey: Tel. +90 216 522 1500, Fax. +90 216 522 1813 Ukraine: Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Tel. +44 208 730 5000, Fax. +44 208 754 8421 United States: Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: Tel. +381 11 3341 299, Fax. +381 11 3342 553 For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 272 4825 Internet: http://www.semiconductors.philips.com (SCA69) (c) Philips Electronics N.V. 2000. All rights reserved. 9397 750 07175 Product specification Rev. 02 -- 6 June 2000 47 of 48 ISP1122A Philips Semiconductors USB stand-alone hub Contents 1 2 3 4 5 5.1 5.1.1 5.1.2 5.2 5.2.1 5.2.2 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 7 8 8.1 8.2 9 9.1 9.2 9.3 9.4 9.4.1 9.4.2 9.4.3 9.4.4 9.4.5 9.4.6 9.4.7 9.4.8 9.4.9 9.4.10 9.4.11 10 10.1 10.2 10.3 11 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 ISP1122AD (SO32) and ISP1122ANB (SDIP32) 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 ISP1122ABD (LQFP32) . . . . . . . . . . . . . . . . . . 6 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6 Functional description . . . . . . . . . . . . . . . . . . . 8 Analog transceivers . . . . . . . . . . . . . . . . . . . . . 8 Philips Serial Interface Engine (SIE). . . . . . . . . 9 Hub repeater. . . . . . . . . . . . . . . . . . . . . . . . . . . 9 End-of-frame timers . . . . . . . . . . . . . . . . . . . . . 9 General and individual port controller . . . . . . . . 9 GoodLink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Bit clock recovery . . . . . . . . . . . . . . . . . . . . . . . 9 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . 9 PLL clock multiplier. . . . . . . . . . . . . . . . . . . . . 10 Overcurrent detection . . . . . . . . . . . . . . . . . . . 10 I2C-bus interface. . . . . . . . . . . . . . . . . . . . . . . 10 Modes of operation . . . . . . . . . . . . . . . . . . . . . 10 Endpoint descriptions . . . . . . . . . . . . . . . . . . . 11 Hub endpoint 0 (control) . . . . . . . . . . . . . . . . . 11 Hub endpoint 1 (interrupt). . . . . . . . . . . . . . . . 11 Host requests . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Standard requests . . . . . . . . . . . . . . . . . . . . . 12 Hub specific requests . . . . . . . . . . . . . . . . . . . 13 Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Hub responses . . . . . . . . . . . . . . . . . . . . . . . . 18 Get device status . . . . . . . . . . . . . . . . . . . . . . 18 Get configuration . . . . . . . . . . . . . . . . . . . . . . 18 Get interface status. . . . . . . . . . . . . . . . . . . . . 18 Get hub status . . . . . . . . . . . . . . . . . . . . . . . . 18 Get port status . . . . . . . . . . . . . . . . . . . . . . . . 19 Get configuration descriptor . . . . . . . . . . . . . . 20 Get device descriptor . . . . . . . . . . . . . . . . . . . 20 Get hub descriptor . . . . . . . . . . . . . . . . . . . . . 20 Get string descriptor (0) . . . . . . . . . . . . . . . . . 20 Get string descriptor (1) . . . . . . . . . . . . . . . . . 20 Get string descriptor (2) . . . . . . . . . . . . . . . . . 20 I2C-bus interface . . . . . . . . . . . . . . . . . . . . . . . 20 Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hardware connections . . . . . . . . . . . . . . . . . . 21 Data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Hub power modes . . . . . . . . . . . . . . . . . . . . . . 22 (c) Philips Electronics N.V. 2000. Printed in The Netherlands All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 6 June 2000 Document order number: 9397 750 07175 11.1 11.1.1 11.1.2 12 12.1 12.2 12.3 12.4 13 14 15 16 17 18 18.1 18.2 18.2.1 18.2.2 18.2.3 18.3 18.3.1 18.3.2 18.4 19 20 21 22 23 24 Voltage drop requirements . . . . . . . . . . . . . . . Self-powered hubs . . . . . . . . . . . . . . . . . . . . . Bus-powered hubs . . . . . . . . . . . . . . . . . . . . . Overcurrent detection . . . . . . . . . . . . . . . . . . . Overcurrent circuit description . . . . . . . . . . . . Power switch selection . . . . . . . . . . . . . . . . . . Tuning the overcurrent trip voltage . . . . . . . . . Reference circuits . . . . . . . . . . . . . . . . . . . . . . Limiting values . . . . . . . . . . . . . . . . . . . . . . . . . Static characteristics . . . . . . . . . . . . . . . . . . . . Dynamic characteristics . . . . . . . . . . . . . . . . . Test information . . . . . . . . . . . . . . . . . . . . . . . . Package outline . . . . . . . . . . . . . . . . . . . . . . . . Soldering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . Surface mount packages . . . . . . . . . . . . . . . . Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . Manual soldering. . . . . . . . . . . . . . . . . . . . . . . Through-hole mount packages . . . . . . . . . . . . Soldering by dipping or by solder wave . . . . . Manual soldering. . . . . . . . . . . . . . . . . . . . . . . Package related soldering information . . . . . . Revision history . . . . . . . . . . . . . . . . . . . . . . . . Data sheet status . . . . . . . . . . . . . . . . . . . . . . . Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 22 23 24 24 24 25 25 30 31 32 38 39 42 42 42 42 42 43 43 43 43 44 45 46 46 46 46 46