HT9580 datasheet(59/63 Pages) HOLTEK

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Application Note

The LCD_CTRL and LCD_CMD registers are used to control the LCD Drivers. The following exam-

ple shows how to initiate the ²MC141803² LCD driver.

The following bit settings are used for the LCD_CTRL register.

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

; * LCD CONTROL *

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

chip1

SET 7

; select HD66410 series LCD driver 1:HD; chip0 don¢t care

chip0

SET 6

; select SED15X (KSX)/MC141X series LCD driver 0:SED, 1:MC

clk

SET 5

; LCD clock output selection

; Just for MC141X series

cmod

SET 4

; enable/disable LCD_CL

cs1

SET 3

; control master LCD driver chip select

cs0

SET 2

; control slave LCD driver chip select

SET 1

; Data/Command select 1:display data on D0~D7

;Data/Command select 0:display control data on D0~D7

SET 0

; LCD Read/Write input 0:WRITE 1:READ

LCDCT EQU 17h

; LCD Control register

LCDCM EQU 18h

; LCD Command register

The following three macros define three different modes including ²LCD COMMAND WRITE²,

²LCD DATA WRITE² and ²LCD DATA READ² modes.

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

; LCDM COMMAND MODE

; LCD_A0=0 command mode

; LCD_WRB=0 write mode

; COMMAND store to ACC

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

LCD_C

MACRO

RMB

a0, LCDCT

RMB

rw, LCDCT

STA

LCDCM

SMB

rw, LCDCT

ENDM

HT9580

April 28, 2000

Preliminary

HT9580 Datasheet(PDF) 59 Page - Holtek Semiconductor Inc

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