Pad Description

Pad No.

Pad Name

I/O

Note

Description

1~9

Y28~Y20

O

LCD driver outputs for channel 2

10~23

Y19~Y6

O

LCD driver outputs for channel 1

24

VDD

Power supply ( positive )

25~30

Y5~Y0

O

LCD driver outputs for channel 1

31

VEE

LCD power supply

32

CLK1

I

Note1

Latch signal for channel 1 on the falling edge

CLK1 is used for channel 2 when MODE is set to VSS

33

CLK2

I

Note1

Shift signal for channel 1 on the falling edge and used for

channel 2 when MODE is set to VSS

34

VSS

Power supply (ground)

35

DL1

I/O

Data input/output of channel 1 shift register

36

DR1

I/O

Data input/output of channel 1 shift register

37

DL2

I/O

Data input/output of channel 2 shift register

38

DR2

I/O

Data input/output of channel 2 shift register

39

ALT

I

Alternate signal input for LCD driving waveform

40

SHF1

I

Note2

Shift direction selection of channel 1 shift register

41

SHF2

I

Note2

Shift direction selection of channel 2 shift register

42

MODE

I

Note3

Mode select signal of channel 2

43~44

V1,V2

I

LCD bias supply voltage for channels 1 and 2

45~46

V3,V4

I

LCD bias supply voltage for channel 1

47~48

V5,V6

I

LCD bias supply voltage for channel 2

49~59

Y39~Y29

O

LCD driver outputs for channel 2

Note1: Data is processed on the clock falling or rising edge as shown in the following table.

MODE= Lo (VSS)

HT1608

4

3rd Feb ’98