Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/ATSAMA5D31/AXIMX/ASIB1_FN_MOD#0x0
ASIB1 Issuing Functionality Modification Register
Read Issuing
Write Issuing
https://github.com/cmsis-svd/cmsis-svd-data