NT3881D View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT3881D

Dot matrix LCD controller and driver / QFP 80L Package

Novatek Microelectronics 

NT3881D

Pin and Pad Descriptions

Pin and Pad No.

Designation

I/O

External

Connection

Description

1 - 22

SEG22 - SEG1

O

LCD panel Segment signal output pins

24, 25

OSC1, OSC2

Pins connected to resistor or ceramic filter for

internal clock oscillation. For external clock

operation, clock inputs to OSC1.

26 - 30

V1 - V5

P

Power supply Power supply for LCD driver

31

CL1

O

NT3882

Clock to latch serial data D sent to NT3882.

32

33, 81

23

CL2

VDDB, VDDA

GND

O

NT3882

Clock to shift serial data D

P

Power supply VDD: +5V

A-Type waveform: VDD bond to VDDA

B-Type waveform: VDD bond to VDDB

P

Power supply GND: 0V

34

M

O

NT3882

Switch signal to convert LCD drive waveform to

AC

35

D

O

NT3882

Character pattern data corresponding to each

common signal is transmitted serially from this

output. 0-Non selection, 1-selection.

36

RS

I

MPU

Register select signal

0: Instruction register (write)

Busy flag, address counter (read)

1: Data register (write, read)

37

R/W

I

MPU

Read/Write control signal

0: Write

1: Read

38

E

I

MPU

Read/Write start signal

39 - 42

DB0 - DB3

I/O

MPU

Lower 4 tri-state bi-directional data bus for

transmitting data between MPU and NT3881D.

Not used during 4-bit operation.

43 - 46

DB4 - DB7

I/O

MPU

Higher 4 tri-state bi-directional data bus for

transmitting data between MPU and NT3881D.

DB7 is also used as busy flag.

47 - 62

COM1 - COM16

O

LCD panel Common signal output pins

63 - 80

SEG40 - SEG23

O

LCD panel Segment signal output pins

5

V2.4

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