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NJU6475B

12-Character 4-Line Dot Matrix Low Power LCD Controller Driver with key Scan Function

Japan Radio Corporation  

NJU6475B

TERMINAL DESCRIPTION

PAD No.

Symbol

11,5

VDD,VSS

4

V5

2,3

OSC1,

OSC2

17

P/S

18

RS

19

20

23

24

25 - 30

22

R/W

E/SCL

DB7/CS

DB6/SIO

DB0 - DB5

REQ

21

35 - 42

LCD/KEY

So -S7

31 - 34

K0 - K3

158 - 151

65 - 72

150 - 143

73 - 80

COM1 - COM32

162 - 159 COMM1 -

COMM4

163

COMS1

82 - 141

81,142

SEG1 - SEG60

SEGM1,SEGM2

I/O

Function

- Power Source : VDD=+3V GND : VSS=0V

- LCD driving voltage

I/O System clock terminal

Oscillation C and R are incorporated. (Normally Open)

For external clock operation, the clock should be input on OSC1.

I Serial input select terminal (fixed to "L")

Register selection signal input terminal

I

"0" instruction register. (Writing)

"1" Data register. (Writing, Reading)

I Read(R) / Write(W) selection signal input terminal

I Serial clock input terminal

I Chip select signal

I/O Data input terminal (3-state data bus.)

I I/O port output terminal

O This terminal normally output "L".

When confirm a key action, REQ terminal output puls.

I Fix to "H" Level

O Key scan signal data output terminal

Open Drain Output

I Key scan data input terminal

In case of non use, fix to "H".

O Common signal output terminal

O Icon common display signal output terminal

O Static driving common signal output terminal

When power down mode VDD or VSS levels are output.

O Segment signal output terminal

O Icon segment driving signal output terminal

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