em65570sagh ELAN Microelectronics Corp, em65570sagh Datasheet - Page 28

• Manufacturer Part Number: em65570sagh
• Description: 68com/98seg 65k Color Stn Lcd Drivers
• Manufacturer: ELAN Microelectronics Corp

EM65570S
68COM/98SEG 65K Color STN LCD Drivers
22 x
7.7 Display RAM Access Using Windows Function
The EM65570S has window area setting command for specified display RAM area
access. In using the window function, it is required to set up two positions, X and Y
address. It is also needed to set up auto increment mode (AXI=”1”, AYI=”1”). Two
position means window start position and window end position. The window start
position’s X and Y address set to normal X address (AX) and Y address (AY) registers.
The window end position’s X and Y address set to Window X End Address (EX) and
Window Y End Address (EY) register. In window function access, can use modify write
access with set to AIM=”1”. In case of using window function access, the following
registers should be set before accessing the RAM.
WIN = “1”, AXI=”1”, AYI=”1”
X Address, Y Address, Window X End Address, Window Y End Address
The following address conditions should also be kept.
Window end X address (EX)
Window end Y address (EY)
X,Y Start Address
X Direction
X,Y End Address
Window start X address (AX)
Window start Y address (AY)
(This specification is subject to change without further notice)
Product Specification (V1.0) 04.18.2006
The Window
accessed area
The entire RAM
display area
(shaded + Window
accessed areas)