UPD16498 datasheet(13/95 Pages) NEC

13 / 95 page

Data Sheet S15730EJ2V0DS

µµµµPD16498

3.3

Driver-Related Pins

Symbol

Name

Pad No.

I/O

Description

SEG1 to

SEG128

Segment

414 to 287

Output

Segment output pins

COM1 to

COM128

Common

216 to 247, 253 to 284,

417 to 448, 454 to 485

Output

Common output pins

PSEG1 to

PSEG20

Static segment

3, 4, 6 to 9, 11 to 14,

16 to 19, 21 to 24, 26,

27, 184, 185,

187 to 190, 192 to 195,

197 to 200, 202 to 205,

207, 208

Output

Segment output pins for static icon

PCOM1,

PCOM2

Static common

214, 215,

486, 487

Output

Common output pins for static icon

(Same driver waveform is output from two pins.)

VRS

Op amp input pin

for regulating the

driving voltage of

the LCD

29, 30

Input

VRS is an op amp input pin for regulating the driving voltage of the

LCD. This is a reference voltage input for the LCD voltage

regulation amplifier.

When using the internal drive circuit (i.e., when OP1 = 1), we

recommend inserting a 0.1 to 1

µF capacitor between this pin and

GND.

Input pin for the op

amp's feedback

connection

35, 36

Input

VR is an input for the op amp's feedback connection. Insert this

pin between GND and AMPOUT when using the feedback resistor

for this input.

This pin is valid only when not using an internal resistor for VLCD

voltage regulation (i.e., when IRS = L). This pin cannot be used

when using the internal resistor for VLCD voltage regulation (i.e.,

when IRS = H).

AMPOUT

33, 34

AMPOUTP

Op amp output

31, 32

Output

These are op amp output pins for regulating the driving voltage of

the LCD. When not using an internal resistor for VLCD voltage

regulation (i.e., when IRS = L), these outputs are connected to the

LCD drive voltage regulation resistor (see 5.6.2 Voltage regulator).

We recommend inserting a 0.01 to 0.1

µF capacitor between

these pins in order to stabilize the internal op amp's output.

DUMMY

Dummy pin

1, 2, 5, 10, 15, 20, 25,

134, 139, 144, 149,

154, 163, 186, 191,

196, 201, 206,

209 to 213, 248 to 252,

415, 416, 449 to 453,

488, 489

−

Dummy pin.

These pins are not connected inside IC. Usually, leave these pins

open.

UPD16498 Datasheet(PDF) 13 Page - NEC

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