a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9325
11.Window Address Function
The window address function enables writing display data consecutively in a rectangular area (a window
address area) made on the internal RAM. The window address area is made by setting the horizontal address
register (start: HSA[7:0], end: HEA[7:0] bits) and the vertical address register (start: VSA[8:0], end: VEA[8:0]
bits). The AM bit sets the transition direction of RAM address (either increment or decrement). These bits
enable the ILI9325 to write data including image data consecutively not taking data wrap positions into
account.
The window address area must be made within the GRAM address map area. Also, the GRAM address bits
(RAM address set register) must be an address within the window address area.
[Window address setting area]
(Horizontal direction) 00H ≤ HSA[7:0] ≤ HEA[7:0] ≤ “EF”H
(Vertical direction) 00H ≤ VSA[8:0] ≤ VEA[8:0]≤ “13F”H
[RAM address, AD (an address within a window address area)]]
(RAM address) HSA[7:0] ≤ AD[7:0] ≤ HEA[7:0]
VSA[8:0] ≤ AD[15:8] ≤ VEA[8:0]
GRAM Address Map
“00000”h
“000EF”h
Window Address Area
2010h
203Fh
213Fh
2110h
4F10h
4F3Fh
“13F00”h
“13FEF”h
Window address setting area
HSA[7:0] = 10h, HSA[7:0] = 3Fh,
VSA[8:0] = 20h, VSA[8:0] = 4Fh,
I/D = 1 (increment)
AM = 0 (horizontal writing)
Figure 37 GRAM Access Window Map
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reproduced, or disclosed in whole or in part without prior written permission of ILI Technology Corp.
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