ST7066 데이터 시트보기 (PDF) - Unspecified

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ST7066

Dot Matrix LCD Controller/Driver

Unspecified 

ST7066

Pin Functions

NAME

RS

NUMBER I/O

1

I

R/W

E

DB4 to DB7

1

I

1

I

4

I/O

DB0 to DB3

CL1

CL2

M

D

4

I/O

1

O

1

O

1

O

1

O

COM1 to COM16 16

O

SEG1 to SEG40 40

O

V1 to V5

5

-

VCC , GND

2

-

OSC1, OSC2

2

INTERFACED WITH

FUNCTION

MPU

MPU

Select registers.

0: Instruction register (for write) Busy flag:

address counter (for read)

1: Data register (for write and read)

Select read or write.

0: Write

1: Read

MPU

MPU

MPU

Starts data read/write.

Four high order bi-directional tristate data bus

pins. Used for data transfer and receive

between the MPU and the ST7066. DB7 can

be used as a busy flag.

Four low order bi-directional tristate data bus

pins. Used for data transfer and receive

between the MPU and the ST7066.

These pins are not used during 4-bit operation.

Extension driver

Clock to latch serial data D sent to the

extension driver

Extension driver

Extension driver

Extension driver

LCD

Clock to shift serial data D

Switch signal for converting the liquid crystal

drive waveform to AC

Character pattern data corresponding to each

segment signal

Common signals that are not used are changed

to non-selection waveform. COM9 to COM16

are non-selection waveforms at 1/8 duty factor

and COM12 to COM16 are non-selection

waveforms at 1/11 duty factor.

LCD

Power supply

Segment signals

Power supply for LCD drive

VCC - V5 = 11 V (Max)

Power supply

Oscillation

resistor clock

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

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=91K

(Vcc=5V)

R=75K

OSC1

1

OSC2

1

R

Clock

input

OSC1

1

OSC2

1

V1.2

5

2000/6/13

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