HT83F22 Datasheet, PDF (133/158 Pages) Holtek Semiconductor Inc – A/D Type Recorder 8-Bit Flash MCU

HT83F22
A/D Type Recorder 8-Bit Flash MCU
V DD
V D D /2
S C O M o p e r a tin g c u r r e n t
S C O M 0~
SCO M 3
C O M nE N
SCO M EN
LCD COM Bias
COMEN
0
1
1
COMnEN
X
Pin Function
I/O
0
I/O
1
SCOMn
Output Control
O/P Level
0 or 1
0 or 1
V_DD/2
LCD Bias Control
The LCD COM driver enables a range of selections to be provided to suit the requirement of the
LCD panel which is being used. The bias resistor choice is implemented using the ISEL1 and ISEL0
bits in the SCOMC register.
Bit
Name
R/W
POR
7
D7
R/W
0
6
ISEL1
R/W
0
5
ISEL0
R/W
0
4
3
2
1
0
SCOMEN COM3EN COM2EN COM1EN COM0EN
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
Bit 7
Bit 6~5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reserved Bit
0: Correct level - bit must be reset to zero for correct operation
1: Unpredictable operation - bit must not be set high
ISEL1, ISEL0: ISEL1 ~ ISEL0: Select SCOM typical bias current (VDD=5V)
00: 25mA
01: 50mA
10: 100mA
11: 200mA
SCOMEN: SCOM module Control
0: Disable
1: Enable
COM3EN: PC3 or SCOM3 selection
0: GPIO
1: SCOM3
COM2EN: PC2 or SCOM2 selection
0: GPIO
1: SCOM2
COM1EN: PC1 or SCOM1 selection
0: GPIO
1: SCOM1
COM0EN: PC0 or SCOM0 selection
0: GPIO
1: SCOM0
Rev. 1.00
133
April 01, 2011