Renesas RX Series

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:
00000000
Bit Symbol Bit Name Description R/W
b1, b0 CTSUSSMOD[1:0] 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 CTSUSSCNT[1:0] 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