ST7066U 데이터 시트보기 (PDF) - Unspecified

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ST7066U

Dot Matrix LCD Controller/Driver

Unspecified 

ST7066U

n Pin Function

Name

RS

R/W

E

DB4 to DB7

DB0 to DB3

CL1

CL2

M

D

COM1 to

COM16

SEG1 to

SEG40

V1 to V5

VCC , GND

OSC1, OSC2

Number

1

1

1

4

4

1

1

1

1

16

40

5

2

2

I/O Interfaced with

Function

Select registers.

0: Instruction register (for write) Busy flag:

I

MPU

address counter (for read)

1: Data register (for write and read)

Select read or write.

I

MPU

0: Write

1: Read

I

MPU

Starts data read/write.

Four high order bi-directional tristate data bus

pins. Used for data transfer and receive

I/O

MPU

between the MPU and the ST7066U. DB7 can

be used as a busy flag.

Four low order bi-directional tristate data bus

pins. Used for data transfer and receive

I/O

MPU

between the MPU and the ST7066U.

These pins are not used during 4-bit operation.

Clock to latch serial data D sent to the

O Extension driver extension driver

O Extension driver Clock to shift serial data D

Switch signal for converting the liquid crystal

O Extension driver drive waveform to AC

Character pattern data corresponding to each

O Extension driver segment signal

Common signals that are not used are changed

to non-selection waveform. COM9 to COM16

O

LCD

are non-selection waveforms at 1/8 duty factor

and COM12 to COM16 are non-selection

waveforms at 1/11 duty factor.

O

LCD

Segment signals

Power supply for LCD drive

-

Power supply VCC - V5 = 10 V (Max)

-

Power supply VCC : 2.7V to 5.5V, GND: 0V

Oscillation

resistor clock

When crystal oscillation is performed, a resistor

must be connected externally. When the pin

input is an external clock, it must be input to OSC1.

Note:

1. Vcc>=V1>=V2>=V3>=V4>=V5 must be maintained

2. Two clock options:

R=91KΩ (Vcc=5V)

R=75KΩ (Vcc=3V)

OSC1

OSC2

R

Clock input

OSC1

OSC2

V2.2

8/42

2006/05/11

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