EM65570
68COM/ 98SEG 65K Color STN LCD Driver
When using the window function to access RAM, you should set the following registers
before accessing.
WIN=”1”, AXI=”1”, AYI=”1”
X Address, Y Address, Window X End Address, Window Y End Address
Moreover, the following address condition must be met.
Window end X address ≧ Window start X address
Window end Y address ≧ Window start Y address
The increment control of the X and Y addresses by AIM, AYI, and AXI registers are as
follows.
AIM
Address Increment Timing
When writing to display RAM or reading from display RAM
This is effective when accessing successive address area
0
Only when writing to display RAM
1
This is used in the case of Read Modify Write
AYI
0
AXI
0
Select Address Increment Operation
Address is not incremented
Remarks
(1)
(2)
(3)
(4)
0
1
X-Address is incremented
1
0
Y-Address is incremented
1
1
X and Y both are incremented
NOTES: 1. Regardless of AIM value, the AX and AY registers do not increment
2. The X address automatically changes according to the AIM setting
Transition of AX Register
Transition of X Address
Same as AX register
00H 01H ....... maxH*
3. The Y address automatically changes according to the AIM setting
Transition of AY Register
Transition of Y Address
Same as AY register
00H 01H ....... 43H
4. Change the X and Y address accordingly to the AIM setting. When the X address
exceed maxH*, Y address increment occurs
Transition of AX and AY Register
Transition of X and Y Address
Same as AX and AY register
AX:
AY:
00H
00H
maxH*
When each AX exceeds maxH,* AY increments
00H 00H 43H
*maxH: The maximum internal X-address in each access mode
Product Specification (V1.0) 09.05.2005
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
