hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 44
hd66765
Manufacturer Part Number
hd66765
Description
396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66765.pdf
(71 pages)
- Current page: 44 of 71
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HD66765
Window Address Function
When data is written to the on-chip GRAM, a window address-range which is specified by the horizontal
address register (start: HSA7-0, end: HEA7-0) or the vertical address register (start: VSA7-0, end:
VEA7-0) can be written to consecutively.
Data is written to addresses in the direction specified by the AM bit (increment/decrement). When image
data, etc. is being written, data can be written consecutively without thinking a data wrap by doing this.
The window must be specified to be within the GRAM address area described below. Addresses must be
set within the window address.
[Restriction on window address-range settings]
[Restriction on address settings during the window address]
Note: In high-speed RAM-write mode, the lower two bits of the address must be set as shown below
according to the value of the ID0 bit.
ID0 0: The lower two bits of the address must be set to 11.
ID0 1: The lower two bits of the address must be set to 00.
(horizontal direction) 00H HSA7-0 HEA7-0 3FH
(vertical direction) 00H VSA7-0 VEA7-0 AFH
(RAM address) HSA5 to 0 AD7-0 HEA7-0
VSA7-0 AD15-8 VEA7-0
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