HD66773R Datasheet, PDF (85/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
Configuration of Grayscale Amplifier
The gradient adjustment and fine adjustment registers determine the eight levels (VIN0-7) of grayscale.
The 8 levels are then divided into 32 levels (V0-31) by the ladder resistors placed between each level.
VREG1OUT
Gradient adjustment
register
PRP/N0 PRP/N1
3
3
Micro adjustment register (6 x 3 bits)
PKP/N0 PKP/N1 PKP/N2 PKP/N3 PKP/N4 PKP/N5
3
3
3
3
3
3
Amplitude adjustment
register
VRP/VRN
45
VGS
8to1
selector
8to1
selector
8to1
selector
8to1
selector
8to1
selector
8to1
selector
VINP0/VINN0
V0
VINP1/VINN1
V1
V2
V3
VINP2/VINN2
V8
V9
VINP3/VINN3
V16
Grayscale
V17
amplifier
VINP4/VINN4
V19
V20
VINP5/VINN5
V24
V25
V26
VINP6/VINN6
V30
VINP7/VINN7
V31
Rev.1.10, Jun.21.2003, page 85 of 133