56.6.3 TRNG Private Key Bus Control Register
This register can only be written if the WPCREN bit is cleared in the TRNG Write Protection Mode Register.
| Name: | TRNG_PKBCR |
| Offset: | 0x08 |
| Reset: | – |
| Property: | Write-only |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| WAKEY[15:8] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | – | – | – | – | – | – | – | – | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| WAKEY[7:0] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | – | – | – | – | – | – | – | – | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| KLENGTH[7:0] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | – | – | – | – | – | – | – | – | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| KSLAVE[1:0] | KID | ||||||||
| Access | W | W | W | ||||||
| Reset | – | – | – | ||||||
Bits 31:16 – WAKEY[15:0] Register Write Access Key
| Value | Name | Description |
|---|---|---|
| 0x524B | PASSWD | Writing any other value in this field aborts the write operation. |
Bits 15:8 – KLENGTH[7:0] Key Length
Length-1 in 32-bit words of the key(s) to be directly loaded from the TRNG into the private key internal registers of the private key bus client KSLAVE.
Example: for one 64-bit key to be loaded, KLENGTH must be written to 1. For 128-bit keys, KLENGTH must be written to 3.
Bits 5:4 – KSLAVE[1:0] Key Bus Client
Private key bus client identifier for the destination encryption unit to be loaded from the TRNG.
| Value | Name | Description |
|---|---|---|
| 0 | TDES_ID |
TDES |
| 1 | AES_ID |
AES |
| 2 | OTPC_ID |
OTPC |
| 3 | Reserved_ID |
Reserved |