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MBK276

LCD

VOLTAGE

SELECTOR

VLCD

12

VDD

5

R

R

R

TIMING

BLINKER

OSCILLATOR

INPUT

FILTERS

I C - BUS

CONTROLLER

2

POWER-

ON

RESET

CLK

4

SYNC

3

OSC

6

VSS

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

40 x 4 BITS

OUTPUT

BANK

SELECTOR

DATA

POINTER

SUB-

ADDRESS

COUNTER

DISPLAY SEGMENT OUTPUTS

DISPLAY LATCH

SHIFT REGISTER

17 to 56

S0 to S39

A0

7

A1

8

A2

9

PCF8576

LCD BIAS

GENERATOR

40

Fig.1 Block diagram (for VSO56 package; SOT190-1).