Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA4W1AD/SYSTEM/EBCKOCR#0x0
EBCKOEN=0
External Bus Clock Output Control Register
EBCLK Pin Output Control
0 (0): BCLK pin output is disabled. (Fixed high)
1 (1): BCLK pin output is enabled
These bits are read as 0000000. The write value should be 0000000.
https://github.com/cmsis-svd/cmsis-svd-data