Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA4M1AB/ICU/DELSR1#0x0
DELS=others
DMAC Event Link Setting Register 1
Event selection to DMAC Start request
0 (0x000): Nothing is selected.
0 (others): See Event Table
These bits are read as 00000000. The write value should be 00000000.
https://github.com/cmsis-svd/cmsis-svd-data