HD66781 Datasheet, PDF (156/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
Window Address Function
The window address function writes data consecutively to the on-chip GRAM within the rectangular
window-address range specified by the horizontal address registers (start: HSA7-0, end: HEA 7-0) and the
vertical address registers (start: VSA7-0, end: VEA7-0).
The address transition direction is determined by AM bit (either increment or decrement). This allows
writing data, including picture data, consecutively without taking the data wrap position into consideration.
The window-address range must be specified within the GRAM address area. An address set must be made
within the window-address range.
[Conditions on setting window-address range]
(horizontal direction) 8’h00 ≤ HSA ≤ HEA ≤ 8’hEF
(vertical direction)
9’h000≤ VSA ≤ VEA ≤ 9’h19F
[Conditions on making an address set within the window-address range]
(RAM address)
HSA ≤ AD7-0 ≤ HEA
VSA ≤ AD16-8 ≤ VEA
18’h00000
GRAM address map
Window address area
18’h02010
18’h02110
18’h0202F
18’h0212F
18’h000EF
18’h05F10
18’h05F2F
18’h19F00
18’h19FEF
Window address range setting
HSA= 8’h10, HEA = 8’h2F I/D = 2’h3(increment)
VSA = 9’h020,VEA = 9’h05F AM = 1’h0(Horizontal write)
Address transition direction in specified window-address range
Rev.0.5, July.31.2003, page 156 of 196