Renesas R61509V - Manual (Page 67)

R61509V Target Spec
Rev. 0.11 April 25, 2008, page 67 of 181
Power Control
Power Control 1 (R100h)
DSTB: When DSTB = 1, the R61509V enters the shut down mode. In shut down mode, the internal logic
power supply is turned off to reduce power consumption. The GRAM data and instruction setting are not
maintained when the R61509V is in the shut down mode. Set the instruction again after the shut down
mode is exited. GND level is outputted to the panel in the shut down mode.
AP[1:0]: Adjusts the constant current in the operational amplifier circuit in the LCD power supply circuit.
The larger constant current, the better the drivability of the LCD, but it also increases the current
consumption. Adjust the constant current taking the trade-off between the display quality and the current
consumption into account. In no-display period, set AP[1:0]=2’h0 to halt operational amplifiers and step-
up circuits to reduce power consumption.
Table 40 Constant Current in Operational Amplifiers
AP[1:0] Electricity in LCD drive power supply amplifiers
2’h0 Operational amplifiers and step-up circuits halt
2’h1 0.5
2’h2 0.75
2’h3 1
Note: The values in the table represent the ratios of currents in respective settings to the current when
AP[1:0]=2’h3.
R/W RS IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
R/W 1 0 0 0 0 0
BT
[2]
BT
[1]
BT
[0]
0 0
AP
[1]
AP
[0]
0
DST
B
0 0
Default 0 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0