HD66773R Datasheet, PDF (32/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
VRL3-0: Set the amplifying scale of VREG2OUT voltage (the reference voltage for Vgoff). The output
from Vci voltage adjustment circuit can be amplified by –1.5 ~ –6.5 times.
VRL3 VRL2 VRL1 VRL0 VREG2OUT Voltage
0
0
0
0
Vci x –1.5
0
0
0
1
Vci x– 2.0
0
0
1
0
Vci x – 2.5
0
0
1
1
Vci x – 3.0
0
1
0
0
Vci x– 3.5
0
1
0
1
Vci x – 4.0
0
1
1
0
Vci x – 4.5
0
1
1
1
Halt
1
0
0
0
Vci x – 5.0
1
0
0
1
Vci x – 5.5
1
0
1
0
Vci x – 6.0
1
0
1
1
Vci x – 6.5
1
1
0
0
Setting inhibited
1
1
0
1
Setting inhibited
1
1
1
0
Setting inhibited
1
1
1
1
Halt
Note) Adjust Vci and VRL3-0 so that the VREG2OUT voltage is –16.0 V or more.
PON: Start operation of step-up circuit 3. To halt operation, set PON = 0. To start operation, set PON = 1.
Rev.1.10, Jun.21.2003, page 32 of 133