HD66773R Datasheet, PDF (35/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
VCM4-0: Set the VcomH voltage (The higher voltage during Vcom AC drive). The amplitude can be
specified within the range of VREG1OUT x 0.4 ~ 0.98. When VCM4-0 = “1111”, the internal volume
adjustment operation is halted, and the VcomH voltage can be adjust by placing an external resistor at
VcomR.
VCM4 VCM3 VCM2 VCM1 VCM0 VcomH Voltage
0
0
0
0
0
VREG1OUT x 0.40
0
0
0
0
1
VREG1OUT x 0.42
0
0
0
1
0
VREG1OUT x 0.44
:
:
:
:
:
0
1
1
0
0
VREG1OUT x 0.64
0
1
1
0
1
VREG1OUT x 0.66
0
1
1
1
0
VREG1OUT x 0.68
0
1
1
1
1
Halt internal volume. Adjust by an
external variable resistor VcomR.
1
0
0
0
0
VREG1OUT x 0.70
1
0
0
0
1
VREG1OUT x 0.72
1
0
0
1
0
VREG1OUT x 0.74
:
:
:
:
:
1
1
1
0
0
VREG1OUT x 0.94
1
1
1
0
1
VREG1OUT x 0.96
1
1
1
1
0
VREG1OUT x 0.98
1
1
1
1
1
Halt internal volume. Adjust by an
external variable resistor VcomR.
Note) Adjust VREG1OUT and VCM4-0 so that the VcomH voltage is the VDH level or less.
123
CL1
FLM
GTEST1,2
Vgoff
VGH
123
VGH
Vgoff
GTEST1, 2 Output Timing Chart
Rev.1.10, Jun.21.2003, page 35 of 133