UPD16431AGC-7ET 查看數據表（PDF） - NEC => Renesas Technology

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UPD16431AGC-7ET

1/2, 1/3, 1/4-DUTY LCD CONTROLLER/DRIVER

NEC => Renesas Technology 

BLOCK DIAGRAM

µPD16431A

STB

DATA

CLK

KEY REQ

Key counter

48

Segment driver

56

Level shifter (56)

56

Selector circuit

8

8

OE LED

driver

Common

driver

4

Level

shifter

4

OE

LCD/LED

SYNC

Write address

I/O

control

56

Output latch (56 × 4)

56

56-bit shift register

2

Read

address

Timing

generator

OSC

8-bit

shift

register 8

Command

decoder

Key counter

Key latch S/R

OSCIN

OSCOUT

key1

key4

VDD VSS VLCD VLC1 VLC2 VLC3

2

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