em65567 ELAN Microelectronics Corp, em65567 Datasheet - Page 24

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

7.9 Relationship between Display RAM and Address
The Display RAM block diagram shows in the figure below:
The EM65567 execute address conversion that depends on control register setting. In case of auto increment mode, usually
AX register is added one. For instance when REF and AXI are both “1”, AX register is added one, but effective X address
seems decrement because of address conversion. The effective Y address use AY register values as it is.
* This specification is subject to be changed without notice.
Bit-order reverse
W rite:depend on
Read:depend on
MPU I/F
REF,SW AP
REF
W rite
Data
Internal Data Bus
Bit order rev erse
X-Address (00H~5FH)
Figure 10. The Display RAM block diagram
Address conv ersion circuit
Display RAM
Read
AX Register
Data
G rayscale Conv ersion
Effective X address
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66 COM/ 96 SEG 256 Color STN LCD Driver
Data Conv ersion
Segm ent
data
Data conversion is
depend on MON, DSEL,
REF,SW AP,GLSB
SEGMENT O utput I/F
Valid maximum is depend
on MO N,W LS setting
Address conversion is
depend on MON,W LS,
PSEL,REF setting
2003/1/9 (V0.1)
EM65567