UPD16667 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD16667

160-OUTPUT LCD ROW DRIVER

NEC => Renesas Technology 

µPD16667

PIN FUNCTIONS

Classification

Power suuply

Liquid-crystal

display timing

Pin Name

VCC1

VSS

VDD

VEE

V1

STB

/FRM

/DOFF’

L1

L2

DIR

Liquid-crystal

drive output

X1 to X160

Input/Output

I

I

I

I

I

I

O

Pad No.

Function

5 V power for level shifter

GND for level shifter

Power for logic, liquid-crystal drive level power

Power for logic, liquid-crystal drive level power (GND)

Liquid-crystal drive level power

Row drive signal strobe

Frame signal

Display OFF signal

Drive level power selection symbol (1st line)

Drive level power selection symbol (2nd line)

Shift direction selection symbol:when L (DIR = VEE), X1 → X160

when H (DIR = VDD), X160 → X1

Liquid-crystal drive output

Selects and outputs one of VDD, VEE, and V1.

DETAILS OF PIN FUNCTIONS

• STB (input)

Input pin of the row drive strobe signal

The bidirectional shift register is shifted at STB’s rising edge.

• /FRM (input)

Input pin of the frame signal

The shift register data is read at STB’s rising edge.

• DIR (input)

Input pin of the drive output’s shift direction selection signal

When the shift direction selection signal (DIR) is “L”, the shift data (selection signal) is shifted from the drive

output X1 to the X160 direction. When “H”, it is shifted from the X160 to the X1 direction.

• /DOFF’ (input)

Input pin of the display OFF signal

It is placed in the display OFF status (all outputs at V1) at the “L” level. In the mean time, it reads the frame signal

and returns to the normal display status at the “H” level.

• L1 and L2 (input)

Input pins of the drive level power selection signal

In the case of the liquid-crystal drive output, the two lines are selected simultaneously by the shift register. L1

selects the first line, and L2 selects the second line. Both lines select VDD at “H”, and VEE at “L”.

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