Rev. 1.00
190
September 11, 2018
Rev. 1.00
191
September 11, 2018
HT45F4050
A/D NFC Flash MCU
HT45F4050
A/D NFC Flash MCU
LCD Bias Current 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. All COM pins are pin-shared with I/O pins and selected as SCOM pins
using the corresponding pin-shared function selection bits.
• SCOMC Register
Bit
7
6
5
4
3
2
1
0
Name
—
ISEL1
ISEL0
SCOMEN
—
—
—
—
R/W
—
R/W
R/W
R/W
—
—
—
—
POR
—
0
0
0
—
—
—
—
Bit 7
Unimplemented, read as "0"
Bit 6~5
ISEL1~ISEL0
:
SCOM typical bias current selection (@
V
DD
=5V)
00: 25
μA
01: 50
μA
10: 100
μA
11: 200
μA
Bit 4
SCOMEN
:
Software controlled LCD driver enable control
0:
Disable
1:
Enable
The SCOMn lines can be enabled using the corresponding pin-shared selection bits if
the SCOMEN bit is set to 1. When the SCOMEN bit is cleared to 0, then the SCOMn
outputs will be fixed at a V
DD
level. Note that the corresponding pin-shared selection
bits should first be properly configured before the SCOMn function is enabled.
Bit 3~0
Unimplemented, read as "0"