EM65567AF datasheet(46/93 Pages) EMC

46 / 93 page

Preliminary

EM65567

66 COM/ 96 SEG 256 Color STN LCD Driver

* This specification is subject to be changed without notice.

2003/1/9 (V0.1)

*****************************************************************************

;

WRITE DISPLAY_PICTURE DATA INTO DISPLAY DATA RAM OF EM65567

;*****************************************************************************

DATA_WRITE_65567:

REG_PORTB,F_LCD_A0

; LCD RS = 1 INSTRUCTION OUTPUT

WRITEOR #XADDRESSLOWER,#0b00000000

;SET X Add=0

WRITEOR #XADDRESSUPPER,#0b00000000

WRITEOR #YADDRESSLOWER,#0b00000000

;SET Y Add=0

WRITEOR #YADDRESSUPPER,#0b00000000

MOV

A,#LINE_Y_MAX

;COMMON = 3FH (63)

MOV

DRAMY,A

DATA_W1:

MOV

A,#LINE_X_MAX

;SEGMENT = 5fh (95)

MOV

DRAMX,A

REG_PORTB,F_LCD_A0

;SET LCD RS=0 DATA READ/WRITE

DATA_W2:

TBRD

01,REG_ACC

;WRITE LCD SCREEN FROM DATA INDEX

CALL

WRITE_LCD_1BYTE

DEC

DRAMX

JBS

REG_STATUS,F_C,DATA_W2

DEC

DRAMY

JBS

REG_STATUS,F_C,DATA_W1

REG_PORTB,F_LCD_A0

;LCD RS = 1 INSTRUCTION OUTPUT

RET

;*****************************************************************************

;

WRITE ONE BYTE DATA INTO DDRAM (PARALLEL MODE 80 SERIES)

;*****************************************************************************

;AT FIRST DEFINE A0 TO IDENTIFY DATA OR INSTRUCTION WRITE

WRITE_LCD_1BYTE:

JBS

REG_DCRG,F_LAHEN,WRITE_LCD_1BYTE_1

;CHECK REG_DCRG LAHEN BIT=1 OR NOT

REG_PORTC,F_LCD_WR

;SET /WR=0 ENABLE WRITE

MOV

REG_DATA,A

;MOVE A==> PORT_G

NOP

;Write low pulse( Wait 2 instruction cycles)

NOP

REG_PORTC,F_LCD_WR

;SET /WR=1 DISABLE WRITE

NOP

EM65567AF Datasheet(PDF) 46 Page - ELAN Microelectronics Corp

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