HD66781 Datasheet, PDF (150/196 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
BST
RAM
write
Front porch (2 lines)
Back porch (14 lines)
Display
operation
[lines]
320
RAM write
(10MHz)76,800 times
Preliminary
R-C oscillation
㫧10%
Panel
Moving picture
Display
(320 lines)
Front porch (2 lines)
Back porch (14 lines)
0
FP+BP=16H
BST
RAM write
5.66MHz
Display
operation
[ms]
7.68
13.4
16.67
13.5
(60Hz)
Minimum RAM write speed and internal clock frequency in VSYNC interface
Notes to the display synchronizing GRAM data transfer mode
1. The aforementioned example of calculation is just a result of calculation. In the actual settings, causes
for the fluctuations such as internal oscillators and so on should be taken into consideration. It is
necessary to make a setting for RAM write speed with enough margins.
2. In the display synchronizing GRAM data transfer mode, write display data to RAM in the high speed
write mode (HWM = 1)
Rev.0.5, July.31.2003, page 150 of 196