Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Freescale Semiconductor/MK21D5WS/DRY/SRAC#0x0
SKRR=0
Secure Read Access Control
Secure Key Register Read
0 (0): Reads to the corresponding Secure Key Register are ignored.
1 (1): Reads to the corresponding Secure Key Register complete as normal.
no description available
https://github.com/cmsis-svd/cmsis-svd-data