Data Sheet S15381EJ1V0DS

8

µµµµPD161602A/B

(2/2)

Pin Symbol

Pin Name

Pad No.

I/O

Description

VCsel

COM amplitude

output fixing signal

428

Input The VCOM output is fixed to L. When the VCOM output is not used, VCsel needs

to be fixed to L.

VCsel = L: VCOM output fixed to L

VCsel = H: VCOM signal output in correspondence with POL signal

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

Osel

Driver output

count switching

430

Input The output count can be selected. When Osel = H, the unused pins S1 to S18 and

S379 to S396 always become Hi-Z.

Osel = L: 396 outputs

Osel = H: 360 outputs

V0 to V4

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.

VSS2

≤ V4 ≤ V3 ≤ V2 ≤ V1 ≤ V0 ≤ VDD2

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

TESTIN

TEST input pin

480

Input Set to H or leave open

TESTO1,

TESTO2

TEST output pin

478,

479

Output Leave open.

VDD1

Logic power

supply

416 to 418, 482

to 484

−

2.2 to 3.6 V

VDD2

Driver power

supply

412 to 414, 494

to 496

−

4.5 to 5.5 V

VSS1

Logic ground

420 to 422, 486

to 488

−

Ground

VSS2

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.

Caution To avoid latchup failure, the sequence when turning on the power must be VDD1

→

→

→

→ logic input →

→

→

→

VDD2

→

→

→

→gray-scale power supply (V0 to V4), and the reverse sequence when turning off the power.

Follow this sequence during shift periods as well.