12864-12-SL-R-ST-ELP datasheet(15/31 Pages) ETC2

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SPECIFICATIONS FOR LIQUID CRYSTAL DISPLAY MODULE

MODEL NO: 12864-12

PACIFIC DISPLAY DEVICES

07.21.2006

(3) Address Pointer Set

The address pointer set command is used to indicate the start address for writing (or reading) to external RAM.

The flow chart address pointer set command

● Control Word Set

Code

Hex

Function

01000000

40H

Text home address set

Low address

High address

01000001

41H

Text area set

Columns

00H

01000010

42H

Graphic home address set

Low address

High address

01000011

43H

Graphic area set

Columns

00H

The home address and column size are defined by this command.

(1) Text Home Address Set

The starting address of external display RAM for Text display is defined by this command. The text home address

shows the left end and most upper position.

The relationship of external display RAM address and display position

TH+CL

TH+TA

TH+TA+CL

(TH+TA)+TA

TH+2TA+CL

(TH+2TA)+TA

TH+3TA+CL

TH+(n-1)TA

TH+(n-1)TA+CL

TH : Text home address

TA : Text area number (columns)

CL : Columns are fixed by hardware. (pin-programmable)

ADDRESS POINTER SET

END

STATUS CHECK

LOW ADDRESS DATA SET

STATUS CHECK

COMMAND 24H SEND

STATUS CHECK

HIGH ADDRESS DATA SET

Address pointer set command send

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