HT9580 datasheet(23/63 Pages) HOLTEK

23 / 63 page

HT9580

April 28, 2000

Preliminary

²LCD-CHIP0² and ²LCD-CHIP1² Truth Table

LCD-CHIP0=²0²

LCD-CHIP0=²1²

LCD-CHIP1=²0² SED15X(KSX) series LCD driver is

selected

MC141X series LCD driver is selected

LCD-CHIP1=²1² HD66410 LCD driver is selected

N/A

²LCD_CL² Truth Table

LCD-CHIP0=²0²

LCD-CHIP0=²1²

LCD-CHIP1=²0² LCD_CL: 2 kHz output

LCD_CL: If ²LCD-CLK²=0, 32 kHz output

If ²LCD-CLK²=1, X1-clock output

LCD-CHIP1=²1² LCD_CL: 10.9kHz output

N/A

The following is a comparison table of the HT9580 pin description between the SED15X (KSX) series

and the MC141X series LCD driver.

HT9580

(Pin)

SED15X(KSX) Series

MC141X Series

LCD_A0

Data/command select input.

A0=0: Display control data on

D0~D7

A0=1: Display data on D0~D7

D/C

Thisinputpinacknowledges

valid data on D0~D7. If high

then D0~D7 contains dis-

play data, if low D0~D7 con-

tainscommanddata.

LCD_CS0 CS (Master) Active low chip select input.

(Master)

CE (Master)

When high, enables the

control pins on the driver.

(Master)

LCD_CS1 CS (Slave)

Active low chip select input.

(Slave)

CE (Slave)

When high, enables the

control pins on the driver.

(Slave)

D0~D7

8-bit, tristate, bidirectional I/O

bus.

D0~D7

Bidirectional bus for

data/command transfer.

LCD_E

Enable clock input

This pin is normal low

clock input. Data on

D0~D7 is latched at the

falling edge of CS.

LCD_RW R/W

Read/write input

R/W

To read the display data

RAM or the internal sta-

tus, pull this pin high.

The pin low indicates a

write operation.

LCD_CL CL

External clock input.

(2kHz output from HT9580)

OSC2

Oscillator input for external

clock is used. (32kHz or

X1-clock output from

HT9580 as determined by

the ²LCD-CLK²).

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