Data Sheet S15381EJ1V0DS

8

µµµµPD161602A/B

(2/2)

Pin Symbol

Pin Name

Pad No.

I/O

Description

COM amplitude

output fixing signal

428

to be fixed to L.

CM

8-color display

mode switching

433

Input The operating mode is switched to 8-color mode. In this mode, turn off the

γ -

resistor, amplifier, and BIAS circuit. However, when the

γ -correction power supply

is input externally, the

γ -circuit current will flow continuously.

CM = L: Normal display mode

CM = H: 8-color display mode

AP

Output SW

ON/OFF

435

Input This pin turns ON/OFF the BIAS circuit and turns on the output SW and amplifier.

When AP is H, the amplifier is set and the LCD is driving.

The amplifier output and output SW are turned on at the rising edge of AP,

starting the LCD drive. Note that the output SW is turned off at the rising edge of

STB and the output becomes Hi-Z.

For the AP input timing, refer to Switching Characteristics Waveform.

GAM

External

γ usage

selection

432

Input When the

γ -correction power supply is input externally, switch GAM to H. If two or

more chips are used, be sure to input the

γ -correction power supply externally.

Figure 4–1 shows an input example of the

γ -correction power supply.

GAM = L: External

γ -correction power supply not input (open)

GAM = H: External

γ -correction power supply input

Driver output

count switching

430

γ -corrected power

supplies

461 to 463,

457 to 459, 453

to 455, 449 to

451, 445 to 447

−

These pins input the

γ -corrected power supplies from outside, the relationship

below must be observed. Also, be sure to stabilize the gray-scale-level power

supply during gray-scale voltage output.

BA

BIAS current

adjustment

function

431

Input This pin adjusts the BIAS current. Select either the high power mode or low power

mode.

BA = L: Low power mode

BA = H: high power mode

TEST input pin

480

Input Set to H or leave open

TEST output pin

478,

479

Output Leave open.

Logic power

supply

416 to 418, 482

to 484

−

2.2 to 3.6 V

Driver power

supply

412 to 414, 494

to 496

−

4.5 to 5.5 V

Logic ground

420 to 422, 486

to 488

−

Ground

Driver ground

424 to 426, 490

to 492

−

Ground

Dummy1 to

dummy40

Dummy

397 to 408, 411,

415, 419, 423, 427,

444, 448, 452, 456,

460, 464, 481, 485,

489, 493, 487, 499

to 510

−

This pin is dummy.

→

→

→

→ logic input →

→

→

→

→

→

→

Follow this sequence during shift periods as well.