em65567 ELAN Microelectronics Corp, em65567 Datasheet - Page 73

• Manufacturer Part Number: em65567
• Description: Com/ Color Driver
• Manufacturer: ELAN Microelectronics Corp

8.2.24 Extended power control
At the time of reset: {HPM, DIS} = 0H, {BF1,BF0}=0H;read address: EH)
※mark shows “Don’t care”
The DIS register can control capacitors discharged that connected between the power supply V1-V4 for LCD drive voltage
and VSS. Caution: V0 is discharged to VDD.
The HPM register is the power control for the power supply circuit for liquid crystal drive.
HPM = “H”: High power mode
HPM = “L”: Normal mode
BF1~BF0: The operating frequency in the booster is selected. When the boosting frequency is high, the driving ability of
booster become high, but the current consumption is increased. Adjust the boosting frequency considering the external
capacitors and the current consumption.
* This specification is subject to be changed without notice.
BF1
D7
1
0
0
1
1
DIS = “0”: Discharge OFF
DIS = “1”: Discharge start
D6
BF0
1
0
1
0
1
D5
1
D4
0
Operating clock frequency in the booster
D3
※
D2
※
HPM
1.5K Hz * 8
1.5K Hz * 4
1.5K Hz * 2
D1
1.5 K Hz
DIS
D0
CSB
0
73
66 COM/ 96 SEG 256 Color STN LCD Driver
RS
1
RDB WRB RE2
1
0
1
RE1
0
RE0
0
2003/1/9 (V0.1)
EM65567