Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Freescale Semiconductor/MK21D5WS/CRC/DATALL#0x0
CRC_DATALL register.
CRCLL stores the first 8 bits of the 32 bit DATA
https://github.com/cmsis-svd/cmsis-svd-data