em65567 ELAN Microelectronics Corp, em65567 Datasheet - Page 74

• Manufacturer Part Number: em65567
• Description: Com/ Color Driver
• Manufacturer: ELAN Microelectronics Corp

EM65567
66 COM/ 96 SEG 256 Color STN LCD Driver
9.
Relationship between Setting and Common/Display RAM
The relationship between the COM pin numbers and the addresses in the Y-direction on the display RAM changes according
to the SHIFT command. LCD Duty Set command. Display Starting Common Position Set command, and Display Starting
Line Set command.
When “0” is selected for the display starting line:
The relationship between the COM pin and the addresses in the vertical direction of the display RAM (hereafter called MY)
changes on an 8-dots basis according to the LCD Duty Set command and the Display Starting Common Position Set
command. When the SHIFT bit is “0”, the common position change in the forward direction. When “1” they change
reverse direction. When “0” is selected as the values for LA5 to LA0 in the Display Starting Line Set command, the MY
number corresponding to the display starting position is “0”. The MY numbers are sequentially shifted backward when
display occurs. In any case, the relations of COMA = MY64 and COMB = MY65 do not change.
When non-zero is selected for the display starting line:
The relationship between the COM pins and the addresses in the vertical direction on the display RAM, MY changes on an 8-
dots basis according to the information in the LCD Duty Set command and Display Starting Common Position Set command.
The common positions change in the forward when the SHIFT bit is “0”, and change in the reverse direction when the SHIFT
bit is “1”. If non-zero is selected for the values for LA5 to LA0 by the Display Starting Line set command. the MY number
corresponding to the display starting position shifts by the set value. The MY number shifts backward when display occurs. If
it exceeds 63, it returns to 0, and the shifts sequentially. In any case, the relations of COMA = MY64 and COMB = MY65 do
not change.
* This specification is subject to be changed without notice.
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2003/1/9 (V0.1)