* This specification are subject to be changed without notice.

EM83040A

LCD CONTROLLER

4

5.31.2001

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

Fig.3

LCD RAM can be written or read with control signal. The RAMEN pin can select a RAM which can be read or

write . The RAMADS pin can select whether RAMD(3:0) are data or address of RAM. At the address mode ,

RAMADS is low and user should sent address three times. From address (11:8) to address (3:0). Then it will go

into data mode when RAMADS is high. In data mode , user can sent one or more nibble data which address can

be increased by internal counter.

Once the RAMEN pin is high, the RAM can not read and write.

SLAVE

MAIN

M1

M0

Segment

Common

Mode1

0

0

0

Reserved for test

Mode2

0

0

1

O(80:1)=S(80:1)

1/9

Mode3

0

1

0

O(80:1)=S(80:1)

1/7

Mode4

0

1

1

O(80:1)=S(80:1)

1/5

* S=Segment, C=common

* (M1, M0) for master must same as slave unit.

(3) RAM control

Writer mode