Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6M3AH/CTSU/CTSUCHTRC1#0x0
CTSU Channel Transmit/Receive Control Register 1
CTSU Channel Transmit/Receive Control 1CTSUCHTRC1[0] corresponds to TS08 and CTSUCHTRC1[7] corresponds to TS15. ( 0: Reception / 1: Transmission )
https://github.com/cmsis-svd/cmsis-svd-data