SWCU191 February 2022 CC1311P3 , CC1311R3 , CC2651P3 , CC2651R3 , CC2651R3SIPA
The local key storage module is directly connected to 1 kB of memory. The module can store up to eight AES keys and has eight 128-bit entries. The key size is programmed in the Key Store module. The key material in the Key Store is not accessible through read operations through the AHB master and slave interfaces.
Keys can only be written to the Key Store through DMA. Once a DMA operation for a key read is started, all received data is written to the Key Store module. Keys that are stored in the Key Store memory can be transferred only to the AES key registers and are not accessible for any other purpose.