EAIC1520-1PGH - Electronic Assembly GmbH

EA IC1520

LOCHHAMER SCHLAG 17

D-82166 GRÄFELFING

PHONE +49-89-8541991

FAX +49-89-8541721

17.4.98

PLCC44J

FEATURES

*FOR LC-GRAPHICS DISPLAYS WITH SED 1520 i.E. 122x32, 120x32, 98x32

*NO TIMING PROBLEMS WITH FAST BUS SYSTEMS

*PROGRAM M I NG BY MEANS OF COM MANDS S I MILAR TO HIGH-LEVEL

LANGUAGE:

*STRAIGHT LINE, POINT, AREA, AND/OR/EXOR, BAR GRAPH...

*3 DIFFERENT FONTS BUILT IN

*ZOOM FUNCTION FOR ALL FONTS (2X, 3 X AND 4 X)

*8 FREELY DEFINABLE CHARA CTERS

* MIXING TEXT AND GRAPHICS

*INPUT ON RS- 232 / CMOS-LEVEL

*DIRECT CONNE C TION TO MAX232 OR EQUIVALENT

*BAUDRATES 1200, 2400, 9600 OR 19200 BAUD

*DOES NOT SLOW DOWN CPU PERFORMANCE

*NEEDS ONLY MAX. 4 EXTERNAL COMPONENTS

*8 DIGITAL I/O-PORTS FREELY AVAILABLE FOR CUSTOM DESIGNS

ORDERING INFORMATION

LOW-COST HIGH-LEVEL GRAPHCONTR. FOR SED1520 EA IC1520-1PGH

HIGH-LEVEL GRAPHICS CONTROLLER FOR SED1520 EA IC1520-2PGH

MATCHING GRAPHICS DISPLAY WITH 120x32 DOTS EA P120-5NLED

CERAMIC RESONATOR SMD 7,37 MHZ, 3 PIN INCL. C´S EA KERS7M37-C

COMPLETE GR APHICS UNIT 120x32 WITH I C1520-1PGH EA GE 120-5NV24

HIGH-LEVEL GRAPHICSCONTROLLER

FOR DISPLAYS WITH SED 1520

EA IC1520

GENERAL

The EA IC1520 High-Level Graphics Controller bonds your system processor to your graphic

display. Inputs accept a serial asynchronous RS-232 interface. The graphic controller includes

complete graph routines to display and various character sizes.

Programming is made by high level programming language graph commands; time consuming

programming of character sets and graph routines is not necessary anymore. Expenditure for

developing of your product is reduced significant and several features are gained on top of it:

- no timing problems with fast processor bus

- enough memory space (operating memory and characterset memory especially for µC)

- no time consuming graphic calculations which would slow down processor speed

Connecting to hardware is very simple. Display and main processor are connected directly. Drivers,

decoders or port modules are not required. A simple display input need 1 wire (RxD) only. 2 up to

maximum 4 external components will complete the circuit: a quartz with 2 capacitors and a reset-

capacitor. No external components are needed when you operate with 8051-compatible systems.

Clock and reset signal can be taken from main processor.

We have two different versions available. Graphics Controller EA IC1520-1 represents the base model.

Version EA IC152 0-2 features an additional big sized font (page 7) and additional commands like

Bargraph 'B', Hardcopy 'H' and more (see page 8).

HARDWARE

Supply voltage of system is +5 Volts. Data transfer is asynchronous serial in RS-232 format at CMOS

level. Data format is 8 data bits, 1 stop bit and no parity. Baud rate can be selected on 3 pins from

150 Baud on up to 115200 Baud. Handshake lines RTS and CTS on board too.

Data format:

Additional 8 I/O-ports are available for freely usage. This may be wired as inputs or outputs*) on individual

desire. Possible applications are switching of backpanel illumination or reading in several keys.

SOFTWARE

Programming of this High-Level Graphics Controller is performed by commands like i.e. "plot a

rectangular box from (0,0) to (64,15) which origins in top left hand corner of display". Therefore the

serial interface has to transmit this sequence of bytes: $52 $00 $00 $40 $0F. Character strings can

be placed exactly to the pixel. Mixing of graphic images with text elements is possible anytime. Three

different character sets are available where each of them can be zoomed 2x, 3x and 4x. The biggest

character set 8x16 allows when using 2x zoom (=16x32) a totally filled display with letters and

numbers.

TESTMODE*)

As long as pin 9 (RTS) is after Power-On or after Reset connected with

GND, the graph ics controller is in test mode. Display shows now a

marked flashing box. When connection Pin 9 (RTS) to GND is

removed, the graphics controller returns to normal operation mode.

*) This function is available only with High-Level-Graphics Controller EA IC1520-2.

EA IC1520

TECHNICAL DESCRIPTION

Datas are valid for Ta= 0..+70°C and VDD= 5,0V ±20% if not noted otherwise.

P OWER-SAVE FUNC TION*)

Power-Save function allows use in

battery powered devices. Command

"Q $01" puts the High-Level-Graph-

controller from Normal operation into

Power-Save mode. The current

consumption (without display) is

reduced to about 100µA. Because the

display is connected to supply voltage,

still some mA current are drawn

depending on type of display. Total

content of display, i.e. all by your own

created characters and bargraph-

definitions remain preserved. In this Power-Save-mode no commands will be accepted and executed

(RTS at H-level).

Command "Q $02" sets controller to Power Save Mode and a transistor driven display to "Static Drive

Mode". Also this mode will not accept and execute commands (RTS on H-level).

An at least 10ms wide reset puls (H-level) turns the graph controller back to normal operation. The

internal registers will be resetted as listed in above table.

Default settings

Power-On after

Power-Save-Mode

Display Control CDisplay on Display on

Text Mode Tset set

Grafik Mode Vset set

Font F 6x8 6x8

Font Factor width/height F1/1 1/1

Last xy W(0;0) (0;0)

Self Defined Characters Eundefinied unchanged

Bar Graph 1..8 Bundefinied unchanged

High Level Graphics Controller Kselected selected

Input/Output I/O0..7 YH-Level H-Level

Symbol Parameter Valid for Condition Min Max Units

VDD Power Supply VDD 11,059 MHz 4 6 V

ICC Power Supply Current VDD, Controller is busy 11,059 MHz 25 mA

ICC Power Supply Current VDD, Controller is ready 11,059 MHz 6.5 mA

ICPS Power Supply Current

Power-Save-Mode VDD VDD=6V 100 µA

VDD=3V 40 µA

VIL Input Low Voltage RESET, I/O0..7, Baud0..1,

Dtyp0..1, Qtyp, RxD, CTS -0.5 0.2*VDD-0.1 V

VIH Input High Voltage I/O0..7, Baud0..1,

Dtyp0..1, Qtyp, RxD, CTS 0.2*VDD+ VDD+0.5 V

VIHR Input High Voltage

Reset RESET 0.7*VDD VDD+0.5 V

VOL Output Low Voltage Out0..7; I/O0..7 IOL=3.2mA 0.45V V

IIL Logical 0 Input Current Baud0..1, Dtyp0..1, Qtyp

RxD, CTS VIN=0.45V -50 µA

ITL Logical 1 to 0

Transition Current Baud0..1, Dtyp0..1, Qtyp

RxD, CTS VIN=2V -650 µA

ILI Input Leakage Current I/O0..7 0.45<VIN<VD ±10 µA

CIO Pin Capacitance RESET, I/O0..7, Baud0..1,

Dtyp0..1, Qtyp, RxD, CTS 1 MHz, 25°C 10 pF

IOL Output Low Current Out0..7, I/O0..7 per line 10 mA

IOP Output Low Current Out, I/O port 26 mA

TRSTH RESET Pulse Width RESET 10 ms

RRST RESET Pull Down

Resistor RESET 50 300 kOhm

TOP Operating

Temperature 0+70 °C

FOSC Oscillator Frequency XTAL1, XTAL2 020 MHz

*) This function is available only with High-Level-Graphics Controller EA IC1520-2.

EA IC1520

BAUD RATES

Various baud rates can be selected depending on

System Clock (Quartz, Ceramic Resonator) for

RS-232 data transfer. Its done by connecting pins

BAUD 0..2 and QTYP to VDD or to GND-level.

Programmable baud rates are shown in this table

(0: GND, 1: VDD).

Baud rates

Baud 1 Baud 0 QTYP = 1 QTYP = 0

11.0592 MHz 3.6864 MHz 7.3728 MHz 14.7456 MHz

0 0 1200 600 1200 2400

0 1 2400 1200 2400 4800

1 0 9600 4800 9600 19200

1 1 19200 9600 19200 38400

EA IC1520-1PGH EA IC1520-2PGH

PINNING

Pin Description

Pin Symbol In/Out Level Description

1NC do not connect

2,3 BAUD0..1 In lo Baud Rates

4QTYP IN lo Quarz type 11,0592MHz / 7,37MHz

5,6 DTYP0, DTYP1 In lo Display type

7M68/Z80 In lo lo: Z80 Mode (RD, WR); hi:M6800 Mode (E, R/W)

8RTSINV (1520-1)

CTS (IC1520-2) Out

In lo

lo RTS Signal inverse (IC1520-1 only)

CTS Handshake (IC1520-2 only)

9RTS Out lo lo: data receve enable

hi: data receive disable

10 RESET In hi default controller settings

11 RxD In lo RS-232 receive

12 NC do not connect

13 NC (IC1520-1)

TxD (IC1520-2) Out lo do not connect (IC1520-1)

RS-232 transmit (IC1520-2 only)

14 CLK Out lo 2kHz clock (at 7,37MHz) for displays with externenal clock

also usable for charge pump with negative voltage

15,16 CS1(E1), CS2(E1) Out hi Display: left (CS1) or right (CS2) display half

17 A0 Out Display: hi: data; lo: command

18 WR (R/W) Out Display: data/command write (Read/Write)

19 RD (E) Out hi Display: data/command read (Enable)

20 XTAL2 Out System clock

21 XTAL1 In System clock (ext. input)

22 GND GND lo Power supply 0V

23 NC do not connect

24,25,26,27,

28,29,30,31 D0..7 I/O Display: 8 Data lines

32,33,34 NC do not connect

35 VDD VDD hi Power supply +5V

36,37,38,39,

40,41,42,43 Out7..0 (IC1520-1)

IO7..0 (IC1520-2) I/O 8 Opendrain output (IC1520-1)

8 In- or output (IC1520-2 only)

44 VDD VDD hi Power supply +5V

EA IC1520

APPLICATION EXAMPLE

M68/Z80 = 0

Pin Symbol Description

15 CS1 low aktive, left half of display

16 CS2 low aktive, right half of display

18 WR low aktive, data/command write

19 RD low aktive, data/command read

M68/Z80 = 1

Pin Symbol Description

15 CS1 low aktive, left half of display

16 CS2 low aktive, right half of display

18 R/W H: read, L: write

19 Eenable

RD (E) = 0

Pin Symbol Description

15 E1 enable, left half of display

16 E2 enable, right half of display

18 R/W H: read, L: write

TYPES OF DISPLA YS

Four standard display types can be preset

by connecting pins DTYP0..1 with VDD or

GND-level (0: GND, 1: VDD). Setting of our

ELECTRONIC ASSEMBLY displays is

shown in table aside. Other displays with

32 pixel in height can be preset with

command "!" "Set display type" (see page 8 and page 15).

Pin 7 presets M68/Z80 displays with Motorola Interface (E, R/

W) as well as displays with Z80 Interface (RD, WR).

Connecting pin 19 RD (E) to GND performes a third drive

mode which is available for displays with 2 Enables, one for

left half of display and one for right half of display.

GENERATING A NEGATIVE DISPLAY VOLTAGE

Pin 14 CLK may drive a negative voltage booster to generate display voltages up to -4V. Command

adjust display contrast 'K' adjusts the display voltage level. Choose a serial resistor between 0..2

kOhms. Low value of serial resistor increases on one hand

the display voltage VEE, but reduces on the other hand the

range for adjustments by command 'K' .

DTYP 1 DTYP 0 Resolution Organisation Display

0 0 70 x 32 70 + 0 EA 8070-5LED

0 1 98 x 32 61 + 37 EA P098-5NLED

1 0 122 x 32 61 + 61 EA P122-5NLED

1 1 120 x 32 60 + 60 EA P120-5N

EA IC1520

DIGITAL INPUTS AND OUTPUTS IO 0..7

8 pins of this High-Level Graph-controller may be used as freely available programmable inputs and

outputs. Also mixed operation of i.e. 3 outputs and 5 inputs is possible.

Output circuit

Command "Y n1 n2"1) sets any selected pin IO 0..7 to H- or to L-level; it

can be compared with an Open-Drain output without pull-up resistor.

Current flows only when L-level is applied. A single pin may be loaded with

max. 10mA, all pins together may be loaded

with 26mA in all (i.e. 2 pins @ 10mA plus 1pin

@ 6mA). Its practicable i.e. to connect and

switch a LED directly. Bigger currents can be

provided by an external transistor circuit.

Note that after Power-On-mode resp. in Power-Save-mode all outputs

will be at H- level.

1)see page 13 for description of commands

*) This function is available only with High-Level-Graphics Controller EA IC1520-2.

APPLI C ATION HINTS

In order to ensure trouble free operation, you should be aware of basic construction rules in digital

electronic applications already during development of your circuit layout:

- Watch for straight ground routing in your layout (no ground loops)

- Supply voltage distribution is best performed star shaped by widend conductor tracks, preferably

by multilayer boards, decoupled with seperate power supply layers.

- Components resp. cuircits with big or highly variable current consumption needs seperate supply

cables. Remaining circuits must be decoupled and filtered on demand. Also power for LED-

illumination of display should be supplied seperate.

- Use blocking capacitors on all active components.

- Keep tracks carrying high frequency signals resp. high rising slopes as short as possible (XTAL1

and XTAL2 !)

Input circuit*)

Input pins accept voltage levels between -0,5V and

+0,2V*VDD-0,1V. Leakage current is max. ±10µA.

Trigger levels are listed in table of technical

description on page 3. Command "X n1"1) allows read

in of datas on each individual pin IO 0..7. Voltage level

must be stable all over the read in procedure. There

is no built in filter circuit to surpress contact jitter.

ATTENTION

handling precautions!

EA IC1520

Font 1: 4x6

BUILT IN F ONTS

EA IC1520-1 High Level Graphics Controller

incorporates two character sets; EA IC1520-2

incorporates three character sets. Each

character set may be used in 1-, 2-, 3- or 4-fold

height. Independant of that the width may be

multiplied by 2x, 3x or 4x. Furthermore you also

can define up to 8 own designed character sets

which are available as long as the supply voltage

is on. (see command 'E').

Each individual character can be placed

precisely to the pixel. You may mix text with

graphics in any way at your desire. Several

different character sizes can be displayed

together.

Font 2: 6x8

Font 3: 8x16

only EA IC1520-2

Font No. usable ASCII character

EA IC1520-1 EA IC1520-2

1: 4x6 32..95 32..95

2: 6x8 32..158 32..255

3: 8x16 -32..158

EA IC1520

S UMM ARY OF A LL GRAPHI C S F UNCTIONS

Command table EA IC1520-1 and -2

Command Remarks

Functions for outputting text

Text mode T R n1 ptn Write character string; n1: overlay combination mode for text output 1=set;

2=delete; 3=inverse; 4=replace; 5=inverse repl.; ptn: use pattern no. 0..7;

Set font Fn1 n2 n3 Set font no. n1; n1=1:4x6 font; n1=2:6x8 font; n1=8x16 font; n2+n3=zoom

factor (1..4); n2=X factor; n3=Y factor;

Set ASCII characters Ax1 y1 n1 The character n1 will be set at coordinate x1,y1. (Reference top left)

Set character string Zx1 y1 ... NUL Output character string (...) to x1,y1; character ´NUL´ ($00)=end

Define character En1 data ... n1=character no.; data =number of bytes dep. on current font

Graphics commands with overlay mode

Graphics mode Vn1 n1: 1=set; 2=delete; 3=inverse; 4=replace; 5=inverse replace;

Set point Px1 y1 Set one pixel at coordinates x1, y1

Draw straight line Gx1 y1 x2 y2 Draw straight line from x1,y1 to x2,y2

Continue straight line Wx1 y1 Draw a straight line from last end point to x1, y1

Draw rectangle Rx1 y1 x2 y2 Draw a rectangle; x1,y1,x2,y2 = opposite corner points

Area with fill pattern Mx1 y1 x2 y2 ptn Draw area with pattern ptn (0..7); x1,y1,x2,y2 = corner points

Other graphics commands

Delete display D L Delete entire contents of display (set to white);

Invert display D I Invert entire contents of display;

Fill display D S Fill entire contents of display; (set to black);

Delete area Lx1 y1 x2 y2 Delete an area; x1,y1,x2,y2 = opposite corner points

Invert area Ix1 y1 x2 y2 Invert an area; x1,y1,x2,y2 = opposite corner points

Fill area Sx1 y1 x2 y2 Fill an area; x1,y1,x2,y2 = opposite corner points

Draw box Ox1 y1 x2 y2 ptn Draw a rectangle with fill pattern ptn (0..7); (always replace)

Upload picture area Ux1 y1 data ... Load a picture area to x1,y1; see picture structure for picture data

Control / definition commands

Adjust display contrast Kn1 n1=0..20 Contrast adustment; 0= low, 20 high

Write I/O port Yn1 n2 n1=0..7: reset I/O port n1 (n2=0); set (n2=1); invert (n2=2) n1=8: Set all 8

I/O ports in accordance with n2 (=8 bit binary value)

Set display type !n1 n2 Another display can be set: n1=X resolution, n2=Resolution of left half of

display

Additional commands for EA IC1520-2 only

Command Remarks

Functions for outputting text

Text-Mode T

n1 ptn R/L/O/U: Write character string (R)ight, (L)eft, (O)ben (up), (U)nten (down)

n1: Overlay combination mode for text output 1=set; 2=delete; 3=invers;

4=Replace; 5=Invers Replace; ptn: Pattern no. 0..7;

Graphic commands with overlay mode

Draw round corner Nx1 y1 x2 y2 Draw a rectangle with round corners; x1,y1,x2,y2 = corner points

Other graphics commands

Draw round box Jx1 y1 x2 y2 ptn Draw a round corner with fill pattern ptn (0..7); (always replace)

Draw bar graph Bno valu Set the bar graph with the ´nr´ (1..8) to the new user ´value'

Control / definition commands

Define bar graph B

no x1 y1 x2 y2 aw ew ptn

Define bar graph to L(eft), R(ight), O(up), U(down)

with the ´nr´ (1..8). x1,y1,x2,y2 form the rectangle

enclosing the bar graph. aw, ew are the values for

0% and 100%. ptn=pattern (0..7).

Display Control Cn1 n1=0:Display off entire unchanged; n1=1:Display on

Power Save Mode Qn1 n1=1: Power save for graphics controller; RTS->HIGH;

n1=2: Power save graphics controller RTS->HIGH; display sleep mode

Send commands

Hardcopy Hx1 y1 x2 y2 An area is requested as a picture. The width and height are sent in pixels

first of all, followed by the actual picture data, via RS232.

Read I/O port Xn1 n1=0..7: load I/O port <n1> (1=H level=5V, 0=L level=0V)

n1=8: load all 8 I/O ports I/O0..I/O7 as 8-bit binary value

Query display type ?This command is used to query the display type. 3 bytes are sent back: X

resolution, Y resol., 'H' (e.g. 240, 64 (pixels), horizontal picture)

EA IC1520

PARAMETERS

Various built in commands can be used to program this High-Level Graphics Controller. Each

command starts with a command letter which is followed by a number of parameters. All commands

with parameters, coordinates and other hand over datas are expected in form of Bytes. No space

characters are allowed, i.e. no space bars, no commas. End of command does not need a closing

byte such as a Carrige Return.

A...Z, L/R/O/U ................................. All commands are transmitted as ASCII code.

Example: G = 71 (dec.) = $47 initiates the straight line

drawing command.

x1, x2, y1, y2 ................................... Coordinates are transmitted with one byte. True values are

from 0..122 for x- resp. 0..31 for y - coordinates.

Example: x1= 10 (dec.) = $0A

n1,n2,nr,aw,ew,value,ptn,data....... Parameters with numbers are transmitted with one byte.

Example: n1= 15 (dec.) = $0F

PATTERN

Several commands allow setting of pattern type parameters (ptn = 0..7). They will link and display

rectangular areas, bargraphs and even text lines with various pattern.

This pattern are available:

ptn=0 ptn=1 ptn=2 ptn=3 ptn=4 ptn=5 ptn=6 ptn=7

white black 25% black 50% black 75% black 45° right 45° left 45° cross hatch

EXAMPL E OF PROGRAMMING

Below table shows the character string "Test" which is displayed at coordinates 7,3.

Example Codes

ASCII ZBEL ETX T e s t NUL

Hex $5A $07 $03 $54 $65 $73 $74 $00

Decimal 90 7 3 84 101 115 116 0

Turbo-Pascal write(aux, 'Z', chr(7), chr(3), 'Test', chr(0));

´C´ fprintf(stdaux, "%c%c%c%s%c", 'Z', 7, 3, "Test", 0);

Q-Basic OPEN "COM1:1200,N,8,2,BIN" FOR RANDOM AS #1

PRINT #1,"Z"+CHR$(7)+CHR$(3)+"Test"+CHR$(0)

EA IC1520

DESCRIPTION OF INDIVIDUAL GRAPHICS FUNCTIONS

Coming pages show detailed descriptions in alphabetical order for each individual function. Examples are shown

as hardcopy in an enlarged window of 50 x 32 pixel once the command has been executed. Examples show

transfered Bytes all in Hex codes.

A x1 y1 n1 Set ASCII-Character

A character n1 will be displayed on coordinates x1,y1 with preset font 'F' and text mode 'T' (set / delete / invert /

replace / invers replace / pattern). Origin is (0,0) at top left hand corner of display.

Datas for coordinates apply also to top left hand corner of a given character.

Note: Font No.1 shows capital letters only.

Example: $41 $13 $02 $45

Character 'E' will be displayed at coordinates 19,2

Preset font: 6x8, with double width and double height

Text mode: Replace and black pattern

B L/R/O/U nr x1 y1 x2 y2 aw ew ptn Define Bargraph*)

Up to 8 bargraphs (nr=1..8) can be defined, which may oscillate to L=left, R=right, O=top or U=bottom direction.

Bargraph full level range coordinates are described from x1,y1 to x2,y2. Scaling of bargraph is performed by

starting zero position aw (=0..254) and max. ending position (full size) ew (=0..254).

Bargraph always is displayed in inverse-mode using the ptn-pattern type: the

background remains preserved in any case. (Note: executing this command only the

bargraph range is defined but nothing is visible on display).

Example: $42 $4F $01 $04 $02 $09 $1E $04 $14 $01

Defines bargraph no. 1 which oscillates vertical up to top. At full level its coordinates

ranges from 4,2 to 9,30. Displayed start- and end- values represent a current value of

4..20 mA. (Hardcopy shows bargraph at its full level operating at $42 $01 $14)

B nr value Draw Bargraph*)

Bargraph number n1 (1..8) will be adjusted to a new value (aw <= value <= ew).

If wert > ew, than final value will be displayed. Bargraph must be defined before,

see above example.

Example: $42 $01 $0A

Above defined bargraph no. 1 is set now to value 10.

C n1 Display Control*)

Switches display On (n1=1) or Off (n1=0); all display datas remains preserved and commands can be executed

furthermore.

Example: $43 $00

Content of display becomes invisible, but remains preserved.

*) This function is available only with High-Level-Graphics Co ntroller EA IC 1520 -2.

EA IC1520

D L/I/S Display Command

Total content of display will be: L=deleted (white), I=inverted or S=filled (black)

Example: $44 $49

inverts total content of display.

E n1 daten Define Characters

Up to 8 characters can be defined by yourself. This characters have ASCII codes from 1 to 8 and remain stored

until the supply voltage is switched off. Attention! For a given ASCII-Code-No. only one font size can be defined.

Example 1:

Command

$45 $03

$04 $02 $7F $02 $04 $00

defines a top pointing arrow with ASCII-No. 3 and with a preset

6x8 character set.

Example 2:

Command

$45 $02

$00 $00 $00 $FF $00 $00 $00 $00

$04 $08 $10 $3F $10 $08 $04 $00

defines a down pointing arrow with ASCII-No. 2 and with a preset 8x16 character set.

F n1 n2 n3 Set Font

Font No. n1 (1=4x6 capital letters only; 2=6x8; 3=8x16*)) is choosed.

Different zoom factors (1..4x) for width n2 and for height n3 are selected.

Example: $46 $02 $03 $04

6x8- font is now set to 3-x width and to 4-x height.

Beside hardcopy shows letter 'E' from font 6x8 in different sizes.

G x1 y1 x2 y2 Draw straight line

Straight line is drawn from coordinates x1,y1 to x2,y2 taking into account

the preset graph mode 'V' (set / clear / invert).

Example: $47 $03 $14 $28 $06

Draws a straight line from 3,20 to 50,6.

B YT E N R .

123456

B it 0

B it 1

B it 2

B it 3

B it 4

B it 5

B it 6

B it 7

BYTE NR.

12345678

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

910 11 12 13 14 15 16

BYTE NR.

*) This function is available only with High-Level-Graphics Controller EA IC 1520 -2.

EA IC1520

H x1 y1 x2 y2 Get Hardcopy from Display*)

Range from top left hand corner x1,y1 to right hand bottom corner x2,y2 is requested. Graphic chip transmits

first width and height of requested display-section and afterwards the datas of display-content. See command

Image Upload 'U' for building up display datas.

Example: $48 $00 $00 $1F $0F

top left hand section of display-content (size 32 x 16 pixel) will be sent via RS-232 immediately.

I x1 y1 x2 y2 Invert Range

The area from top left hand corner x1,y1 to right hand bottom corner x2,y2 will be

inverted (black pixel turns to white and vice versa).

Example: $49 $00 $00 $17 $1B

inverts display-content of example "Set Font" in range from 0,0 to 23,27.

J x1 y1 x2 y2 ptn Draw a rounded corner box*)

A rectangular box with rounded corners is drawn from top left hand corner x1,y1 to

right hand bottom corner x2,y2 and filled with pattern ptn and delete background. See

also 'N' draw rectangular with rounded corner.

Example: $4A $07 $03 $23 $16 $03

draws a rounded corner box from 7,3 to 35,22 filled with pattern 3=50% black.

K n 1 Adjust contrast of display

A charging pump can be built up by using the clock signal CLK (Pin 14). Varying the pulse ratio n1 (0..20) will

change the negative contrast voltage within certain limits.

Example: $4B $14

Sets contrast to maximum value = 20 (clock signal on CLK pin is set to 50% ratio).

L x1 y1 x2 y2 Clear a specific display area

Area from top left hand corner x1,y1 up to bottom right hand corner x2,y2 will be

cleared.

Example:

$44 $53

$4C $06 $04 $28 $19

Display is filled first with 'D', 'S' followed by clearing the area from 6,4 to 40,25.

M x1 y1 x2 y2 ptn Fill an area with pattern

A rectangular area starting from top left hand corner x1,y1 up to bottom right hand

corner x2,y2 is filled with pattern ptn according to preset graphic mode 'V' (set / clear

/ inverse / replace / inverse replace).

Example: $4D $05 $01 $2D $1A $07

draws a cross hatch pattern 7=45° from 5,1 to 45,26.

*) This function is available only with High-Level-Graphics Co ntroller EA IC 1520 -2.

EA IC1520

N x1 y1 x2 y2 Draw rectangular with rounded corners*)

Draw a rectangular with rounded corners from top left hand corner x1,y1 up to bottom

right hand corner x2,y2 honoring preset graphic mode 'V' (set / clear / inverse).

Content of box remains unchanged. See also drawing box with rounded corners 'J' .

Example: $4E $06 $02 $26 $13

draws a box with rounded corners from coordinates 6,2 up to coordinates 38,19.

O x1 y1 x2 y2 ptn Draw Box

A rectangular box is drawn from top left hand corner x1,y1 up to bottom right hand

corner x2,y2 filled with pattern ptn. Background of box will be cleared.

Consult also 'R' = draw rectangular.

Example: $4F $02 $05 $12 $1E $02

draws a box from coordinates 2,5 up to coordinates 18,30 with pattern 2= 25% black.

P x1 y1 Place a Dot

A single dot will be placed at coordinates x1, y1 honoring preset graphic mode 'V' (set

/ clear / inverse).

Example: $50 $0D $11

places a single Pixel at coordinates 17,13.

Q n1 Power Save Mode*)

Example: $51 $01

switches our High-Level Graphic Controller into Power-Save-Mode. Handshake line RTS shows H- level which

means that no more commands will be accepted. Supply voltage may be reduced now down to 2 Volts.

Applying a wide pulse of >10 msec onto reset pin will awake the controller. Contents of registers remains

unchanged, see table on page 3.

R x1 y1 x2 y2 Draw Rectangular

A rectangular is drawn from top left hand corner x1,y1 up to right hand bottom corner

x2,y2 honoring the preset graphic mode 'V' (set / clear / inverse). Contents of

rectangular box remains unchanged.