INPUT  VOLTAGE

VI

VSS

－

VDD

V

SUPPLY VOL. FOR LOGIC

VDD-VSS

－

－

7.0

V

SUPPLY VOL. FOR LCD

VDD-VEE

－

－

10.0

V

NO

SYM

LEVEL

FUNCTION

1

VSS

－

0V

2

VDD

－

+5V

3

VO

－

CONTRAST       ADJ.

4

D/I

H/L

H:DATA, L:INSTRUCTION CODE

5

R/W

H/L

H:READ(LCD    MPU) L:WRITE(MPU    LCD)

6

E

H.H   L

ENABLE  SIGNAL

7

DB0

H/L

DATA BIT0

8

DB1

H/L

DATA BIT1

9

DB2

H/L

DATA BIT2

10

DB3

H/L

DATA BIT3

11

DB4

H/L

DATA BIT4

12

DB5

H/L

DATA BIT5

13

DB6

H/L

DATA BIT6

14

DB7

H/L

DATA BIT7

15

CS1

H

CHIP SELECT SIGNAL FOR IC1

16

CS2

H

CHIP SELECT SIGNAL FOR IC2

17

RST

L

RESET SIGNAL

18

VEE

-5.0V

NEGATIVE VOLTAGE OUTPUT (-5.0V)

19

A(+)

+5.0V

LEDBACKLIGHT(+)

20

K(-)

0V

LEDBACKLIGHT(-)