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EPL09060H

9 COM/ 60 SEG LCD Driver

ELAN Microelectronics 

EPL09060

9 COM/60 SEG LCD Driver

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

; 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

BC

REG_PORTC,F_LCD_WR

;SET /WR=0 ENABLE WRITE

MOV

REG_DATA,A

;MOVE A==> PORT_G

NOP

;Write low pulse( Wait for

;2 instruction cycles)

NOP

BS

REG_PORTC,F_LCD_WR

;SET /WR=1 DISABLE WRITE

NOP

NOP

NOP

NOP

RET

WRITE_LCD_1BYTE_1:

MOV

REG_DATA,A

;MOVE A==> PORT_G

RET

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

;; Read One Byte Data Into DDRAM (Parallel Mode 80 Series)

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

;AT FIRST DEFINE A0 TO IDENTIFY DATA OR INSTRUCTION READ

READ_LCD_1BYTE:

BC

REG_PORTB,F_LCD_RD

;SET /RD=0 ENABLE READ

NOP

NOP

MOV

A,REG_DATA

;MOVE PORT_G ==> A

NOP

BS

REG_PORTB,F_LCD_RD

;SET /RD=1 DISABLE READ

NOP

RET

Product Specification (V1.0) 12.28.2005

41

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