SPLC782A Datasheet, PDF (20/40 Pages) List of Unclassifed Manufacturers – 16COM/40SEG Controller/Driver

SPLC782A
5.15. Supply Voltage for LCD Drive
LCD bias can be selected by open/short V2 and V3 pins.
Duty Factor
1/8, 1/11
1/16
Supply
Voltage
1/4
1/5
SPLC782A
V2
V3
short
SPLC782A
V2
V3
open
V2, V3
Short
Open
1/4 Bias
1/5 Bias
(1/8, 1/11 Duty)
(1/16 Duty)
Figure 5-29: Supply Voltage for LCD Drive
l _{5.15.1. The relations between LCD frames frequency and oscillators frequency}
tia ^{ly (Assume the oscillation frequency is 250KHz, 1 clock cycle time = 4.0s)}
n ⁿ 5.15.2. 1/8 Duty, type-A waveform
e ^O _{400 clocks}
fid ^{e VPP}
1
2
3
4
on ^{Us COM1}
V1
V2(V3)
V4
C _R VSS
1 frame
s ^E 1 frame = 4 (s) x 400 x 8 = 12800 (s) = 12.8 ms
lu ^{Frame frequency =}
1
= 78.1 (Hz)
IN ^{12.8 (ms)}
p _{Figure 5-30: 1/8 Duty type-A waveform}
un ^{TM 5.15.3. 1/11 Duty, type-A waveform}
S R ^{400 clocks}
A _COM1
VPP
V1
1
2
3
4
P _V2(V3)
r_V4
Fo^VSS
1 frame
8
1
2
11
1
2
1 frame = 4 (s) x 400 x 11 = 17600 (s) = 17.6 ms
Frame frequency =
1
= 56.8 (Hz)
17.6 (ms)
Figure 5-31: 1/11 Duty type-A waveform
© Sunplus Technology Co., Ltd.
20
Proprietary & Confidential
FEB. 15, 2005
Version: 1.7