EM65570
68COM/ 98SEG 65K Color STN LCD Driver
8.2.9 Booster Setup (VU)
D7 D6 D5 D4 D3 D2 D1 D0
CSB RS RDB WRB RE2 RE1 RE0
1
0
1
1
0
VU2 VU1 VU0
0
1
1
0
0
0
0
(At the time of reset: {0,VU2,VU1,VU0} = 5H, read address: BH)
The booster steps set to VU register
VU2
0
VU1
0
VU0
0
Booster Operation
Booster disable (No operation)
2 times voltage output
3 times voltage output
4 times voltage output
5 times voltage output
6 times voltage output
Prohibit code
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Prohibit code
8.2.10 Bias Sett ing Register (B)
D7 D6 D5 D4 D3 D2 D1 D0
CSB RS RDB WRB RE2 RE1 RE0
1
1
0
0
B2 B1 B0
0
1
1
0
0
0
0
*
* Don’tCare
(At the time of reset: {B2, B1, B0} = 5H, read address: CH)
This register is used to set a bias ratio. A bias ratio can be selected from 1/4 to 1/9 by
setting B2, B1, and B0.
B2
0
B1
0
B0
0
Bias
1/4 Bias
1/5 Bias
1/6 Bias
1/7 Bias
1/8 Bias
1/9 Bias
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
66 •
Product Specification (V1.0) 09.05.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
