BS86B12A-3 Datasheet, PDF (165/195 Pages) Holtek Semiconductor Inc – Touch A/D Flash MCU with LED/LCD Driver

BS86B12A-3/BS86C16A-3/BS86D20A-3
Touch A/D Flash MCU with LED/LCD Driver
LCD Bias Control
The LCD COM and SEG driver enable a range of selections to be provided to suit the requirement
of the LCD panel which are being used. The bias resistor choice is implemented using the ISEL1
and ISEL0 Bits in the SLCDC0 register.
SLCDC0 Register
Bit
Name
R/W
POR
7
FRAME
R/W
0
6
ISEL1
R/W
0
5
ISEL0
R/W
0
4
LCDEN
R/W
0
3
2
1
0
COM3EN COM2EN COM1EN COM0EN
R/W
R/W
R/W
R/W
0
0
0
0
Bit 7
Bit 6~5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
FRAME: Fram 0 or Frame 1 output selection
0: Frame 0
1: Frame 1
ISEL1~ISEL0: SCOM and SSEG operating current selection (VDD=5V)
00: 8.3μA
01: 16.7μA
10: 50μA
11: 100μA
LCDEN: SCOM and SSEG module on/off control
0: Disable
1: Enable
The SCOMn and SSEGm lines can be enabled using COMnEN and SEGmEN if
LCDEN=1. When LCDEN=0, then the SCOMn and SSEGm outputs will be fixed at a
VSS level.
COM3EN: SCOM3 or other function selection
0: Other function
1: SCOM3
COM2EN: SCOM2 or other function selection
0: Other function
1: SCOM2
COM1EN: SCOM1 or other function selection
0: Other function
1: SCOM1
COM0EN: SCOM0 or other function selection
0: Other function
1: SCOM0
Rev. 1.40
165
December 05, 2016