R01UH0823EJ0100 Rev.1.00
Page 1507 of 1823
Jul 31, 2019
RX23W Group
43. Capacitive Touch Sensing Unit (CTSU)
43.2.14
CTSU Sensor Offset Register 0 (CTSUSO0)
CTSUSO[9:0] Bits (CTSU Sensor Offset Adjustment)
These control bits adjust the input current offset of the sensor ICO. These bits are used to offset the sensor ICO input
current generated from electrostatic capacitance while the electrode is not being touched during touch measurement, thus
preventing overflow of the CTSU sensor counter.
Make settings for the TS pin that is to be measured next after a CTSUWR interrupt is generated.
CTSUSNUM[5:0] Bits (CTSU Measurement Count Setting)
These bits set how many times the number of measurement pulses specified by the CTSUSDPRS.CTSUPRRATIO[3:0]
and CTSUSDPRS.CTSUPRMODE[1:0] bits is repeated in the measurement time. The number of measurement pulses is
repeated (CTSUSNUM[5:0] bits + 1) times.
Make settings for the TS pin that is to be measured next after a CTSUWR interrupt is generated.
Address(es): CTSU.CTSUSO0 000A 0914h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
CTSUSNUM[5:0]
CTSUSO[9:0]
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b9 to b0
CTSU Sensor Offset Adjustment
b9
b0
0 0 0 0 0 0 0 0 0 0: Current offset amount is 0
0 0 0 0 0 0 0 0 0 1: Current offset amount is 1
0 0 0 0 0 0 0 0 1 0: Current offset amount is 2
:
:
1 1 1 1 1 1 1 1 1 0: Current offset amount is 1022
1 1 1 1 1 1 1 1 1 1: Current offset amount is
maximum
R/W
b15 to b10 CTSUSNUM[5:0]
CTSU Measurement Count Setting
These bits set the number of measurements.
R/W