EM785830AD Datasheet, PDF (25/49 Pages) ELAN Microelectronics Corp – 8-BIT MICRO-CONTROLLER

16.38KHz
EM785830AD
8-bit Micro-controller
Fig.8 Block diagram of TCC WDT
IOC5 (PORT5 I/O control, LCD bias control)
PAGE0 (LCD bias control bits)
7
6
5
4
3
2
1
0
IOC57 IOC56 IOC55
-
BIAS3 BIAS2 BIAS1 BIAS0
R/W-1 R/W-1 R/W-1
R/W-0 R/W-0 R/W-0 R/W-0
Bit 0 ~ Bit 3 (BIAS0 ~ BIAS3) : LCD operation voltage selection. V1 = VDD * (1 - n/60)
BIAS3
0
0
0
0
0
:
1
1
1
BIAS2
0
0
0
0
1
:
1
1
1
BIAS1
0
0
1
1
0
:
0
1
1
BIAS0
0
1
0
1
0
:
1
0
1
Vop (=VDD-VLCD)
VDD * (1-0/60)
VDD * (1-1/60)
VDD * (1-2/60)
VDD * (1-3/60)
VDD * (1-4/60)
:
VDD * (1-13/60)
VDD * (1-14/60)
VDD * (1-15/60)
Example (VDD = 3V)
3V
2.95V
2.90V
2.85V
2.80V
:
2.35V
2.30V
2.25V
Bit 4 : (undefined) not allowed to use
Bit 5 ~ Bit 7 (IOC55 ~ IOC57) : PORT5(5~7) I/O direction control register
0 Î put the relative I/O pin as output
1 Î put the relative I/O pin into high impedance
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* This specification is subject to be changed without notice.
12/14/2004 (V1.4)