Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Alif Semiconductor/AE302F80F5582AE_CM55_HE_View/CDC/CDC_IRQ_MASK0#0x0
IRQ Enable 1 Register
Line IRQ enable.
FIFO underrun warning IRQ enable.
Bus error IRQ enable.
Register reload IRQ enable.
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https://github.com/cmsis-svd/cmsis-svd-data