3

LH1694

FUNCTIONAL OPERATIONS OF EACH BLOCK

BLOCK

FUNCTION

Control Logic

Used to create signals necessary for mode selecting signal, cascade sequence setting

signal and for operation of bi-directional shift register.

Bi-directional Shift

Register

Used as transfer circuit of LCD drive output start signal. It is possible to set LCD drive

Level Shifter

Used as circuit which shifts LCD drive output signals transferred by bi-directional shift

Output Circuit

INPUT/OUTPUT CIRCUITS

I

Level Shifter

Internal Logic

To Internal Circuit

,

Fig. 1

Input Circuit

¿Applicable pins¡

Output Signal

Output Control Signal

Level Shifter

To Internal Circuit

I

O



Fig. 2

Input/Output Circuit

¿Applicable pins¡

SVIO, SVOI