HCD66740BP datasheet(11/95 Pages) HITACHI

Part #	HCD66740BP

Description	112 x 80-dot Graphics LCD Controller/Driver

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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11 / 95 page

HD66740

11

Table 2

Pin Functional Description (cont)

Signals

Number of

Pins

I/O

Connected to

Functions

C1+, C1–

8

—

Booster

capacitance

External capacitance should be connected here for

boosting.

C2+, C2–

6

—

Booster

capacitance

External capacitance should be connected here when

using the triple or more booster.

C3+, C3–

6

—

Booster

capacitance

External capacitance should be connected here when

using the quadruple and five-times booster.

C4+, C4–

6

—

Booster

capacitance

External capacitance should be connected here when

using the five-times booster.

RESET*

1

I

MPU or external

R-C circuit

Reset pin. Initializes the LSI when low.

OPOFF

1

I

V

CC or GND

Turns the internal operational amplifier off when

OPOFF = V

CC, and turns it on when OPOFF = GND. If

the amplifier is turned off (OPOFF = V

CC), V1 to V5

must be supplied to the V1OUT to V5OUT pins.

VccDUM

1

O

Input pins

Outputs the internal V

CC level; shorting this pin sets the

adjacent input pin to the V

CC level.

GNDDUM

1

O

Input pins

Outputs the internal GND level; shorting this pin sets

the adjacent input pin to the GND level.

Dummy

5

—

Dummy pad.

Must be left disconnected.

TEST

1

I

GND

Test pin.

Must be fixed at GND level.

VTEST1

1

I

GND or V

CC

Adjusts the driving capability of the internal operationa

amplifier for the LCD.

This signal enters the normal

drive mode in the GND side, and it enters the high-

power drive mode in the V

CC side.

When the display

quality is not sufficient, use the high-power drive mode

even though the power-consumption current is large.

VTEST2

1

—

Test pin.

Must be left disconnected.

VTEST3

1

I

V

CC or GND

Adjusts the driving capability of the internal operationa

amplifier for the LCD.

This signal enters the normal

drive mode or high-power mode in the GND side

according to the VTEST1 pin setting, and it enters the

low-power drive mode in the V

CC side.

Use this signa

in the low-power mode so that the display quality is no

lowered.

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