UPD16680 Ver la hoja de datos (PDF) - NEC => Renesas Technology

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componentes Descripción

Fabricante

UPD16680

1/53, 1/40 DUTY, LCD CONTROLLER/DRIVER WITH BUILT-IN RAM

NEC => Renesas Technology 

µPD16680

3.3 Driver System Pins

Pin Symbol

Pin Name

Pin No.

I/O

Function Description

SEG1 to

SEG100

COM1 to

COM51

Segment

Common

132 to 231 O Segment output pins.

102 to 112,

117 to 130,

232 to 247,

252 to 261

O Common output pins

PCOM

Pictographic common

131, 262

O Common output pins for pictograph.

(Same waveform output from these pins.)

AMPIN(+)

AMPIN(-)

AMPOUT

Dummy

Operational amplifier input 19, 20

I These pins are the input pins of operational amplifier for LCD

driving voltage adjustment.

When using the internal D/A converter, leave AMPIN(+) open.

When not using the internal D/A converter, it is necessary to

16,17

input the reference voltage.

AMPIN(–) is connected to the resister for LCD driving voltage

adjustment.

See 4. LCD DRIVING VOLTAGE CONTROL CIRCUIT.

Operational amplifier

13,14

O This is the input pin of operational amplifier for LCD driving

output

voltage adjustment. Normally it is connected to the resister for

LCD driving voltage adjustment. See 4. LCD DRIVING

VOLTAGE CONTROL CIRCUIT. It recommends to connect to

this pin a 0.1 to 1 µF capacitor to make the output of the

internal operational amplifier be stable.

Dummy pad

1, 2, 3, 9, 12, - Dummy pins are not connected to the internal circuit. Leave

15, 18, 21,

open if they are not used.

24, 28, 32,

33, 40, 44,

54, 76,

98 to 101,

113 to 116,

248 to 251,

263, 264

4. LCD DRIVING VOLTAGE CONTROL CIRCUIT

DACHA

AMPIN(+)

D/A

Converter

+

−

Reference power circuit

VEXT

AMPIN(−)

AMPout

VLC1

VLC2

VLC3

VLCBS1 VLCBS2 VLCBS3

VLC4

VLC5

VSS

R2

R1

C1

Data Sheet S12694EJ2V0DS00

9

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