HD66731A01TB0L datasheet(13/131 Pages) HITACHI

13 / 131 page

HD66730/HD66731

Table 1

Pin Functional Description (cont. HD66730)

Signal

Number

of Pins

I/O

Device

Interfaced with

Function

CL1

Extension driver

Outputs the latch pulse of segment extension

driver.Cam also be used as a shift clock of common

extention driver. Exters tristate when both EXT1 and

EXT2 are 0.

CL2

Extension driver

Outputs shift clock of segment extension driver. Can

also be used as a common extension driver latch clock.

Enters tristate when both EXT1 and EXT2 are 0.

SEGD

Extension driver

Outputs data of extension driver. Data after the 72nd

dot is output. Enters tristate when EXT1 bit is 0.

Extension driver

Acts as an alternating current signal of extension driver.

Enters tristate when both EXT1 and EXT2 bits are 0.

V1 to V5

—

Power supply

Power supply for LCD drive

CC – V5 = 15V (max)

CC/GND

—

Power supply

CC: +2.4V to +5.5V, GND: 0V

OSC1/

OSC2

—

Oscillation

resistor/

clock

When crystal oscillation is performed, an external

resistor must be connected. When the pin input is an

external clock, it must be input to OSC1.

Vci

—

Inputs voltage to the booster to generate the liquid

crystal display drive voltage.

Vci is reference voltage and power supply for the

booster.

Vci: 1.0V to 5.0V

≤ V

CC.

V5OUT2

V5 pin/

booster

capacitor

Voltage input to the Vci pin is boosted twice and output.

When the voltage is boosted three times, a capacitor

with the same capacitance as that of C1–C2 should be

connected here.

V5OUT3

V5 pin

Voltage input to the Vci pin is boosted three times and

output.

C1/C2

—

Booster capacitor External capacitor should be connected here when

using the booster.

HD66731A01TB0L Datasheet(PDF) 13 Page - Hitachi Semiconductor

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