UPD161622P データシートの表示（PDF） - NEC => Renesas Technology

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UPD161622P

396 OUTPUT TFT-LCD SOURCE DRIVER WITH RAM

NEC => Renesas Technology 

µ PD161622

3.5 Driver-Related Pins

Symbol

S1 to S396

Pin Name

Source output

VCOM

VCOUT1

VCOUT2

BGRIN

COM adjustment

Center rectangle

signal output

Center rectangle

signal output

External-power-

supply connect

Pad No.

556 to 365,

352 to 149

85

81, 82

68

90

VCOMR

VCOM setting

89

resistor connection

FBRSEL

VCOM setting

92

external circuit select

CVPH,

CVPL,

CVNH,

CVNL

DAC0 to DAC7

Basis power supply

for γ -corrected

power supplies

D/A converter

value setting

77,

76,

75,

74

114 to 107

I/O

Output Source output pins

Function

Output This pin is the common adjustment output.

Output This pin is the center rectangle signal output (Vp-p) for common

modulation between 0 V to VS.

Output This pin is the center rectangle signal output (Vp-p) for common

modulation between 0 V to VCC1.

Input

This is an external-power-supply connect pin for VCOM.

This pin is valid when BGRS (power supply control register 1: R25) =

1. In this case, the reference voltage of the amplifier for setting the

common waveform center value is input from outside the µPD161622

When BGRS = 0, power supply with built-in the µPD161622 is set up

as a standard voltage for common waveform center value setup.

In this case, leave it open.

For more detail, refer to 5.5 Common Adjustment.

Input

Connects an external feedback resistor for VCOM setting.

This pin is valid when FBRSEL = L. In this case, connect a feedback

resistor between the VCOM pin and GND.

Input

−

When FBRSEL = H, the amplifier for setting the common waveform

center value operates as a voltage follower. In this case, leave it open.

For more detail, refer to 5.5 Common Adjustment.

This pin is used to select the method of adjusting the amplifier for

setting the common waveform center value used to set the COMMON

drive waveform center level.

FBRSEL = H: Voltage follower circuit used (VCOMR connected to VCOM

internally)

FBRSEL = L: External feedback resistor used

This is operational amplifier output pin for the γ -corrected power

supplies. Normally, this pin connects capacitor of 1 µF

Input

These pins set the reference voltage of the amplifier for setting the

VCOM value used to set the COMMON drive waveform center level.

These pins are valid when the VCOM output center value setting

register (R29) = 00H and BGRS (R25: D6) = 0.

This pin is pulled up to the inside IC, therefore, connect to only VSS

when in low level setting pin.

For more details, refer to 5.5 Common Adjustment Circuit.

Data Sheet S15649EJ2V0DS

11

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