R01UH0823EJ0100 Rev.1.00
Page 1503 of 1823
Jul 31, 2019
RX23W Group
43. Capacitive Touch Sensing Unit (CTSU)
43.2.11
CTSU High-Pass Noise Reduction Control Register (CTSUDCLKC)
The CTSUDCLKC register should be set when the CTSUCR0.CTSUSTRT bit is 0.
CTSUSSMOD[1:0] Bits (CTSU Diffusion Clock Mode Select)
These bits set the mode of the spectrum diffusion clock for high-pass noise reduction. When using the high-pass
function, the value of these bits should be fixed to 00b. If these bits are not set, the effect of high-pass noise reduction
cannot be correctly obtained.
CTSUSSCNT[1:0] Bits (CTSU Diffusion Clock Control)
These bits adjust the spectrum diffusion amount to reduce high-pass noise. When using the high-pass noise reduction
function, the value of these bits should be fixed to 11b. If these bits are not set, touch measurement may not be correctly
performed.
Address(es): CTSU.CTSUDCLKC 000A 0910h
b7
b6
b5
b4
b3
b2
b1
b0
—
—
CTSUSSCNT[1:
0]
—
—
CTSUSSMOD[1
:0]
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b1, b0
CTSU Diffusion Clock Mode
Select
These bits should be set to 00b.
R/W
b3, b2
—
Reserved
These bits are read as 0. The write value should be 0. R/W
b5, b4
CTSU Diffusion Clock Control
These bits should be set to 11b.
R/W
b7, b6
—
Reserved
These bits are read as 0. The write value should be 0. R/W
