HD66712UA02TA0 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD66712UA02TA0

Dot-Matrix Liquid Crystal Display Controller/Driver

Hitachi -> Renesas Electronics 

HD66712U

Table 1 Pin Functional Description (cont)

Signal

CL1

CL2

D

M

EXT

Number

of Pins

1

1

1

1

1

V1 to V5 5

VCC/GND 2

OSC1/

2

OSC2

Vci

1

V5OUT2 1

V5OUT3 1

C1/C2

2

RESET* 1

TEST

1

Device

I/O Interfaced with Function

O Extension driver When EXT = high, outputs the extension driver latch

pulse.

O Extension driver When EXT = high, outputs the extension driver shift

clock.

O Extension driver When EXT = high, outputs extension driver data; data

from the 61st dot on is output.

O Extension driver When EXT = high, outputs the extension driver AC

signal.

I

—

When EXT = high, outputs the extension driver

control signal. When EXT = low, the signal becomes

tristate and can suppress consumption current.

— Power supply

Power supply for LCD drive

VCC –V5 = 11V (max)

— Power supply

VCC: +2.7V to +5.5V, GND: 0V

— Oscillation resistor When crystal oscillation is performed, an external

clock

resistor must be connected. When the pin input is an

external clock, it must be input to OSC1.

I

—

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 ≤ VCC

O V5 pin/ booster Voltage input to the Vci pin is boosted twice and

capacitance

output. When the voltage is boosted three times, the

same capacitance as that of C1–C2 should be

connected here.

O V5 pin

Voltage input to the Vci pin is boosted three times and

output.

— Booster

capacitance

External capacitance should be connected here when

using the booster.

I

—

Reset pin. Initialized to “low.”

I

—

Test pin. Should be wired to ground.

376

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