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MGG383

LCD

VOLTAGE

SELECTOR

12

5

TIMING

BLINKER

OSCILLATOR

INPUT

FILTERS

I C-BUS

CONTROLLER

2

POWER-

ON

RESET

CLK

4

SYNC

3

OSC

6

11

SCL

2

SDA

1

SA0

10

DISPLAY

CONTROLLER

COMMAND

DECODER

BACKPLANE

OUTPUTS

13

BP0

14

BP2

15

BP1

16

BP3

INPUT

BANK

SELECTOR

DISPLAY

RAM

24

× 4 BITS

OUTPUT

BANK

SELECTOR

DATA

POINTER

SUB-

ADDRESS

COUNTER

DISPLAY SEGMENT OUTPUTS

DISPLAY LATCH

SHIFT REGISTER

17 to 40

S0 to S23

A0

7

A1

8

A2

9

PCF8566

LCD BIAS

GENERATOR

VSS

VLCD

VDD

R

R

R

Fig.1 Block diagram.