6 BIT 300 / 309 CHANNEL TFT-LCD SOURCE DRIVER

KS0641

7

PIN DESCRIPTIONS

Symbol

Pin Name

Description

VDD1

Logic power supply

3.0- 5.5 V

VDD2

Driver power supply

3.0 - 5.5 V

VSS1

Logic ground

Ground (0 V)

VSS2

Driver ground

Ground (0 V)

Y1 – Y309

Driver outputs

The D/A converted 64 gray scale analog voltage is output.

D0<0:5>

- D2<0:5>

Display data input

The display data is input with a width of 18 bits,

gray-scale data (6 bits) by 3 dots (R,G,B) DX0: LSB, DX5: MSB

SHL

Shift direction control input

This pin controls the direction of shift register in cascade connection.

The shift direction of the shift registers is as follows.

SHL = H: DIO1 input, Y1

→ Y309, DIO2 output

SHL = L: DIO2 input, Y309

→ Y1, DIO1 output

DIO1

Start pulse input / output

SHL = H: Used as the start pulse input pin.

SHL = L: Used as the start pulse output pin.

DIO2

Start pulse input / output

SHL = H: Used as the start pulse output pin.

SHL = L: Used as the start pulse input pin.

CLK2

Shift clock input

Refer to the shift register's shift clock input. the display data is loaded

to the data register at the rising edge of CLK2.

CLK1

Latch input

Latches the contents of the data register at rising edge and transfers

them to the D/A converter. Also, after CLK1 input, clears the internal

shift register contents. After 1 pulse input on start, operates normally.

CLK1 input timing refers to the "Relationships between CLK1 start

pulse (DIO1, DIO2) and blanking period" of the switching

characteristic waveform.

SELT

300 / 309CH output

control input

This pin controls 300CH or 309CH output.

SELT = H: 309CH output

→ Y151 to Y159 are useless.

SELT = L: 300CH output.

→ Y151 to Y159 are useless.

This pin is internally pulled-up.(Rpu = 30 k

Ω)

VGMA1

–

VGMA11

Gamma corrected power

supplies

Input the gamma corrected power supplies from external source.

VDD2

≥ VGMA1 > VGMA2 > ……… > VGMA10 > VGMA11 ≥ VSS2

Keep gray-scale power supply unchanged during the gray-scale

voltage output.

TESTB

Test input

TESTB = H: Normal operation mode

TESTB = L: Test mode (OP AMP CUT-OFF)

This pin is internally pulled-up.(Rpu = 30k

Ω)