Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/ETH/ETH_MACWTR#0x0
WTO=B_0x0
Watchdog timeout register
Watchdog Timeout
0 (B_0x0): 2 Kbytes
1 (B_0x1): 3 Kbytes
2 (B_0x2): 4 Kbytes
3 (B_0x3): 5 Kbytes
12 (B_0xC): 14 Kbytes
13 (B_0xD): 15 Kbytes
14 (B_0xE): 16383 Bytes
Programmable Watchdog Enable
https://github.com/modm-io/cmsis-svd-stm32