EM65571AGH EMC [ELAN Microelectronics Corp], EM65571AGH Datasheet - Page 32

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

EM65571
130COM/128SEG 65K Color STN LCD Driver
26 •
7.9 Display RAM Data and LCD
7.10 Segment Display Output Order/Reverse Set up
registers. The window end position’s X and Y address set to Window the X-end
Address (EX) and Window Y-end Address (EY) register. In window function access,
you can modify the write access and set to AIM=”1”. In the case of using window
function access, it should be set to the following registers before accessing the RAM.
WIN = “1”, AXI=”1”, AYI=”1”
X-Address, Y-Address, Window X-end Address, Window Y-end Address
Moreover, you should keep the following address conditions:
Window end X-address (EX) ≧ Window start X-address (AX)
Window end Y-address (EY) ≧ Window start Y-address (AY)
One bit of display RAM data corresponds to one dot of LCD. Normal display and
reverse display by REV register are setup as follows.
Normal display (REV=0): RAM data = “0” not lighted
RAM data = “1” lighted
Reverse display (REV=1): RAM data = “0” lighted
RAM data = “1” not lighted
The order of display output, SEGA0, SEGB0, SEGC0 to SEGA127, SEGB127, and
SEGC127 can be reversed. If REF control bit is set to “1”, display by reversing access
to display the RAM from the MPU by using REF register. This reduces the limitation in
placing IC when assembling an LCD panel module.
(X,Y) Start Address
Window Access Area
Figure 10. All Display RAM Area
X direction
(This specification is subject to change without further notice)
Product Specification (V1.0) 08.04.2005
(X,Y) End Address