UPD16681 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

View to exact match

UPD16681

LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS

NEC => Renesas Technology 

µPD16681

3. PIN FUNCTIONS

3.1 Power Supply System Pins

Pin Symbol

Pin Name

VDD

Logic power supply pin

Boost circuit power supply

pin

VSS

Logic ground

Driver ground

VLCD

Driver power supply pins

Pad No.

50-54

55-59

29-31

VLC1 - VLC5

Reference power supply

pins for driver

14-28

VLCBS1 - VLCBS3 Bias value setting pins

C1+, C1-

C2+, C2-

C3+, C3-

Capacitor connection pins

2-7

32-49

I/O

Description

− Power supply pins for logic and boost circuit

− Ground pins for logic and driver circuit

− Power supply pins for driver. Output pin for internal boost circuit.

Connect a 1-µF capacitor between these pins and the VSS pins

for boosting.

If not using the internal boost circuit, a direct driver power supply

can be input.

− These are reference power supply pins for the LCD driver.

Leave these pins open if an internal bias has been selected.

Connect a capacitor to ground.

− When selecting an internal bias, the bias value can be changed

connecting these pins outside of the IC.

− These are capacitor connection pins for the boost circuit.

Connect a 1-µF capacitor.

Data Sheet S13104EJ5V0DS00

5

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