EM65571AGH EMC [ELAN Microelectronics Corp], EM65571AGH Datasheet - Page 33

• Manufacturer Part Number: EM65571AGH
• Description: 130COM / 128SEG 65K Color STN LCD Driver
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.0) 08.04.2005
(This specification is subject to change without further notice)
7.11 Relationship between Display RAM and Address
The Display RAM Block Diagram is shown in the figure below:
The EM65571 executes address conversion that depends on the control register
setting. In case of auto increment mode, usually the AX register is incremented by one.
For instance when REF and AXI are both “1”, the AX register is incremented by one,
but the effective X-address seems to decrement because of address conversion. The
effective Y-address use AY register values as it is.
Write:depends on
Read:depends on
Bit-order reverse
MPU I/F
REF, SWAP
REF
Write
Data
Bit Order Reverse
Internal Data Bus
X-Address (00H~FFH)
Address Conversion Circuit
Figure 11. Display RAM Block Diagram
Display RAM
Read
AX Register
Data
Grayscale Conversion
130COM/128SEG 65K Color STN LCD Driver
Effective X-address
Data Conversion
Segment data
SEGMENT Output I/F
Data conversion is
dependent on 65K,
REF, SWAP, GLSB
Valid maximum is dependent
on 5K, WLS, WIN, HSW,
C256 setting
Address Conversion is
dependent on 65K, WLS,
REF setting
EM65571
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