BS2824 Holtek Semiconductor Inc., BS2824 Datasheet - Page 69

• Manufacturer Part Number: BS2824
• Description: Touch Key Mcu
• Manufacturer: Holtek Semiconductor Inc.

Rev. 1.00
LCD Bias Control
SCOMC Register
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 7
Bit 6,5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Name
R/W
POR
Bit
Reserved Bit
ISEL1, ISEL0: SCOM operating current selection (V
SCOMEN: SCOM module on/off control
SCOMn can be enable by COMnEN if SCOMEN=1
COM3EN: PB3 or SCOM3 selection
COM2EN: PB2 or SCOM2 selection
COM1EN: PB1 or SCOM1 selection
COM0EN: PB0 or SCOM0 selection
1: Unpredictable operation - bit must NOT be set high
0: Correct level - bit must be reset to zero for correct operation
00: 25 A
01: 50 A
10: 100 A
11: 200 A
0: disable
1: enable
0: GPIO
1: SCOM3
0: GPIO
1: SCOM2
0: GPIO
1: SCOM1
0: GPIO
1: SCOM0
R/W
7
0
SCOMEN
ISEL1
R/W
0
1
1
6
0
ISEL0
COMnEN
R/W
5
0
69
X
0
1
BS2824/BS2854/BS2868
Output Control
SCOMEN COM3EN COM2EN COM1EN COM0EN
R/W
4
0
Pin Function
SCOMN
I/O
I/O
R/W
3
0
Touch Key MCU
DD
=5V)
O/P Level
0 or 1
0 or 1
V
R/W
DD
2
0
/2
R/W
1
0
January 27, 2010
R/W
0
0