HT46R068B/HT46R069B
Enhanced A/D Type 8-bit OTP MCU
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.
● SCOMC Register
Bit
Name
R/W
7
—
6
ISEL1
R/W
0
5
4
3
2
1
0
ISEL0 SCOMEN COM3EN COMꢃEN COM1EN COM0EN
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
POR
Bit 7
Reserved Bit
1: Unpredictable operation - bit must NOT be set high
0: Correct level - bit must be reset to zero for correct operation
Bit 6,5
ISEL1, ISEL0: SCOM operating current selection (VDD=5V)
00: 25μA
01: 50μA
10: 100μA
11: 200μA
Bit 4
SCOMEN: SCOM module on/off control
0: disable
1: enable
SCOMn can be enable by COMnEN if SCOMEN=1
Bit 3
Bit 2
Bit 1
Bit 0
COM3EN: PB3 or SCOM3 selection
0: I/O
1: SCOM3
COM2EN: PB2 or SCOM2 selection
0: I/O
1: SCOM2
COM1EN: PB1 or SCOM1 selection
0: I/O
1: SCOM1
COM0EN: PB0 or SCOM0 selection
0: I/O
1: SCOM0
Rev. 1.00
79
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HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
