HD66773R Datasheet, PDF (33/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
VRH3-0: Set the amplifying scale of VLOUT1 voltage (the reference voltage for VCOM and grayscale
voltage). The output from Vciout output amplifier can be amplified by 1.33 ~ 2.775 times.
VRH3 VRH2 VRH1 VRH0 VREG1OUT Voltage
0
0
0
0
REGP x 1.33
0
0
0
1
REGP x 1.45
0
0
1
0
REGP x 1.55
0
0
1
1
REGP x 1.65
0
1
0
0
REGP x 1.75
0
1
0
1
REGP x 1.80
0
1
1
0
REGP x 1.85
0
1
1
1
Halt
1
0
0
0
REGP x 1.900
1
0
0
1
REGP x 2.175
1
0
1
0
REGP x 2.325
1
0
1
1
REGP x 2.475
1
1
0
0
REGP x 2.625
1
1
0
1
REGP x 2.700
1
1
1
0
REGP x 2.775
1
1
1
1
Halt
Note) Adjust VC2-0 and VRH3-0 so that the VREG1OUT voltage is 5.0 V or less.
VCOMG: When VCOMG = 1, VcomL outputs a negative voltage up to –5V. When VCOMG = 0, the
VcomL voltage is GND and negative-polarity amplifier is halted to reduce power consumption. When
VCOMG = “0”, the setting in VDV4-0 is made invalid. In this case, make adjustment for the AC
amplitudes of Vcom and Vgoff with VCM4-0, VocomH settings.
Rev.1.10, Jun.21.2003, page 33 of 133