HD66773R Datasheet, PDF (95/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
8-color Display Mode
The HD66773R incorporates 8-color display mode. The available grayscale levels are V0 and V31, and the
voltages for the other levels (V1-V30) are halted to reduce power consumption.
The γ-fine-adjustment registers, PKP0-PKP5 and PKN0-PKN5 are not available in the 8-color display
mode. Since the power supply for the levels V1-V30 are halted, R and B data in GRAM should be set to
either “00000” or “11111” and G data in GRAM to either “000000” or “111111” before setting this mode
so that V0 or V31 is selected.
Graphics RAM (GRAM)
MSB
LSB
Display data
R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B4 B3 B2 B1 B0
Positive
polarity
register
VRP14
VRP03
VRP13
PKP 02 PKP 01 PKP 00
PKP 12 PKP 11 PKP 10
PKP 22 PKP 21 PKP 20
PKP 32 PKP 31 PKP 30
PKP 42 PKP 41 PKP 40
PKP 52 PKP 51 PKP 50
PRP 02 PRP 01 PRP 00
PRP 12 PRP 11 PRP 10
VRP02 VRP01 VRP00
VRP12 VRP11 VRP10
Nagative
polarity
register
VRN14
VRN03
VRN13
PKN 02 PKN 01 PKN 00
PKN 12 PKN 11 PKN 10
PKN 22 PKN 21 PKN 20
PKN 32 PKN 31 PKN 30
PKN 42 PKN 41 PKN 40
PKN 52 PKN 51 PKN 50
PRN02 PRN01 PRN00
PRN12 PRN11 PRN10
VRN02 VRN01 VRN00
VRN12 VRN11 VRN10
Data expansion circuit
R5 R4 R3 R2 R1 R0
Data expansion circuit
B5 B4 B3 B2 B1 B0
V0
6
6
6
8 _Grayscale 2
amplifier
V31
2
grayscale control
<R>
LCD driver
2
grayscale control
<G>
LCD driver
2
grayscale control
<B>
LCD driver
RGB
LCD
Rev.1.10, Jun.21.2003, page 95 of 133