UPD16680 datasheet(6/44 Pages) NEC

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Data Sheet S12694EJ2V0DS00

µµµµPD16680

3. PIN DESCRIPTIONS

3.1 Power System Pins

Pin Symbol

Pin Name

Pin No.

I/O

Function Description

VDD

Logic and booster power

supply pin

22, 23,

48 to 50,

73 to 75,

82, 96

Power supply pin for logic and booster circuit.

VSS

Logic and driver ground

51 to 53

Ground pin for logic and driver circuit.

VLCD

Driver power supply pin

45 to 47

Driver power supply pin. Output pin of internal booster circuit.

Please connect with a 1

µF booster capacitor to ground.

When not using the internal booster circuit, the driver power

can be turned on directly.

VLC1 to VLC5

Driver reference power

supply

25 to 27,

29 to 31,

33 to 35,

37 to 39,

41 to 43

Reference power supply pin for LCD drive.

When the internal bias is selected, be sure to leave it open.

When display contrast is bad, connect a capacitor between

these pins and ground.

VLCBS1 to

VLCBS3

Bias level select pin

4, 5, 7,

8, 10, 11

When the internal bias is selected, Connecting these pins

outside the IC, the bias level can be changed.

+, C

–

+, C

–

+, C

–

Capacitor connection pins

55 to 72

Capacitor connection pins for booster circuit. When using

internal booster circuit, connect a 1

µF capacitor between

these pins.

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