em78p811 ELAN Microelectronics Corp, em78p811 Datasheet - Page 19

• Manufacturer Part Number: em78p811
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

_________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
* Bit 1 : zero
* Bit 2~4 (Bias1~Bias3) Control bits used to choose LCD operation voltage .
* Bit5:port6 switch , 0/1= normal I/O port/COMMON output
* Bit6:port9 low nibble switch , 0/1= normal I/O port/SEGMENT output . Bit7:port9 high nibble switch
PAGE1 :
OP77
7
LCD operate voltage
com2
seg
000
001
010
011
100
101
110
111
Fig.11.key scan signal
OP76
6
C2S
5
Vop (VDD 5V)
C1S
4
30us
0.60VDD
0.66VDD
0.74VDD
0.82VDD
0.87VDD
0.93VDD
0.96VDD
1.00VDD
PSC1
3
PSC0
2
18
CDRD
VDD=5V
1
3.0V
3.3V
3.7V
4.0V
4.4V
4.7V
4.8V
5.0V
0
-
8-bit OTP Micro-controller
vdd
v1
v2
v3
vlcd
Gnd
vdd
v1
v2
v3
vlcd
Gnd
EM78P811