em65570sagh ELAN Microelectronics Corp, em65570sagh Datasheet - Page 81

• Manufacturer Part Number: em65570sagh
• Description: 68com/98seg 65k Color Stn Lcd Drivers
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 04.18.2006
(This specification is subject to change without further notice)
8.2.38 RC Oscillator Resistance Ratio
(At the time of reset: {RF3, RF2, RF1, RF0} = 0H, read address: DH)
The RF registers can control the resistance ratio of RC oscillator. Hence, the frame
frequency can change the RF registers setting.
When change RF registers value, should be need to check LCD display quality.
8.2.39 Booster Frequency Control
(At the time of reset: {BF1, BF0, HPM, DIS}=4H;read address: EH)
The DIS register can control capacitors discharged that connected between the power
supply V0-V4 for LCD drive voltage and VSS.
When using this register, refer to 7-21 (Discharge circuit).
DIS = “0”: Discharge OFF
DIS = “1”: Discharge start
– mark shows “Don’t care”
D7 D6 D5 D4
D7 D6 D5 D4
1
1
RF3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
RF2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
BF1 BF0 HPM DIS
D3
RF3 RF2 RF1 RF0
D3
RF1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D2
D2
D1
D1
RF0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D0
D0
68COM/98SEG 65K Color STN LCD Drivers
CSB RS RDB WRB RE2 RE1 RE0
CSB RS RDB WRB RE2 RE1 RE0
0.72 times of initial Resistance Ratio
0.86 times of initial Resistance Ratio
1.14 times of initial Resistance Ratio
1.28 times of initial Resistance Ratio
0.65 times of initial Resistance Ratio
0.79 times of initial Resistance Ratio
0.93 times of initial Resistance Ratio
1.07 times of initial Resistance Ratio
1.21 times of initial Resistance Ratio
1.35 times of initial Resistance Ratio
1.42 times of initial Resistance Ratio
1.49 times of initial Resistance Ratio
1.56 times of initial Resistance Ratio
1.63 times of initial Resistance Ratio
1.7 times of initial Resistance Ratio
0
0
Initial Resistance Ratio
1
1
Operation
1
1
0
0
1
1
EM65570S
0
0
x 75
0
0