HT48R063/064/065/066/0662/067
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 be-
ing 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: PB3 or SCOM3 selection
0: GPIO
1: SCOM3
COM2EN: PB2 or SCOM2 selection
0: GPIO
1: SCOM2
COM1EN: PB1 or SCOM1 selection
0: GPIO
1: SCOM1
COM0EN: PB0 or SCOM0 selection
0: GPIO
1: SCOM0
Rev. 1.10
59
June 9, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
