HT68F14 HOLTEK [Holtek Semiconductor Inc], HT68F14 Datasheet - Page 121

• Manufacturer Part Number: HT68F14
• Description: Enhanced I/O Flash Type MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Rev. 1.10
Bit 7
Bit 6~5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Name
R/W
POR
LCD Bias Control
Bit
SCOMC Register
The SCOMEN bit in the SCOMC register is the overall master control for the LCD driver; however
this bit is used in conjunction with the COMnEN bits to select which Port C pins are used for LCD
driving. Note that the Port Control register does not need to first setup the pins as outputs to enable the
LCD driver operation.
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.
R/W
D7
Reserved Bit
ISEL1, ISEL0: ISEL1 ~ ISEL0: Select SCOM typical bias current (V
SCOMEN: SCOM module control
COM3EN: GPIO or SCOM3 selection
COM2EN: GPIO or SCOM2 selection
COM1EN: GPIO or SCOM1 selection
COM0EN: GPIO or SCOM0 selection
7
0
0: Correct level - bit must be reset to zero for correct operation
1: Unpredictable operation - bit must not be set high
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
SCOMEN
0
1
1
ISEL1
R/W
6
0
ISEL0
COMnEN
R/W
5
0
X
0
1
Output Control
SCOMEN
R/W
121
4
0
Enhanced I/O Flash Type MCU
Pin Function
SCOMn
HT68F13/HT68F14/HT68F15
COM3EN
I/O
I/O
R/W
3
0
COM2EN
R/W
2
0
O/P Level
0 or 1
0 or 1
V
DD
DD
=5V)
/2
COM1EN
R/W
1
0
February 9, 2011
COM0EN
R/W
0
0