HT46R064D/065D/066D
Enhanced A/D Type 8-Bit OTP MCU with LED Driver
LCD COM Bias
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
¾
6
ISEL1
R/W
0
5
ISEL0
R/W
0
4
3
2
1
0
SCOMEN COM3EN COM2EN COM1EN COM0EN
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: 25mA
01: 50mA
10: 100mA
11: 200mA
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: PC6 or SCOM3 selection
0: GPIO
1: SCOM3
COM2EN: PC7 or SCOM2 selection
0: GPIO
1: SCOM2
COM1EN: PB7 or SCOM1 selection
0: GPIO
1: SCOM1
COM0EN: PB6 or SCOM0 selection
0: GPIO
1: SCOM0
Rev. 1.00
71
January 12, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
