EM83040A
LCD CONTROLLER
y
iminar
Prel
SLAVE
Mode1
Mode2
Mode3
Mode4
MAIN
0
0
0
0
M1
0
0
1
1
M0
0
1
0
1
Segment
Reserved for test
O(80:1)=S(80:1)
O(80:1)=S(80:1)
O(80:1)=S(80:1)
Common
1/9
1/7
1/5
* S=Segment, C=common
* (M1, M0) for master must same as slave unit.
(3)RAM control
Writer mode
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.
* This specification are subject to be changed without notice.
5.31.2001
4
EMC [ ELAN MICROELECTRONICS CORP ]
