Pad Description

Pad No.

Pad Name I/O

Description

1

Y0

O

LCD driver output for channel 1

2

VEE

—

LCD power supply

3~6

V1~V4

I

LCD bias supply voltage for LCD driver

7

VSS

—

Power supply (ground)

8

CLK1

I

Clock to latch serial data on the falling edge

(Note 1)

9

SHF1

I

Shift direction selection of channel 1 shift register

(Note 2)

10

SHF2

I

Shift direction selection of channel 2 shift register

(Note 2)

11

VDD

—

Power supply ( positive )

12

CLK2

I

Clock to shift serial data on the falling edge

(Note 1)

13

DL1

I/O Data input/output of channel 1 shift register

14

DR1

I/O Data input/output of channel 1 shift register

15

DL2

I/O Data input/output of channel 2 shift register

16

DR2

I/O Data input/output of channel 2 shift register

17

ALT

I

Alternate signal input for LCD driving waveform

18~57

Y40~Y79

O

LCD driver outputs for channel 2

58~96

Y39~Y1

O

LCD driver outputs for channel 1

Note 1: Data is processed on the clock falling or rising edge as shown in the following table.

HT1609L

5

25th Aug ’98