20.3.12 AIC Interrupt Redirection Register
| Name: | SFR_AICREDIR |
| Offset: | 0x54 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| AICREDIRKEY[30:23] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| AICREDIRKEY[22:15] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| AICREDIRKEY[14:7] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| AICREDIRKEY[6:0] | NSAIC | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bits 31:1 – AICREDIRKEY[30:0] Unlock Key
Value is a XOR between 0xb6d81c4d and SN1[31:0] but only field [31:1] of the result must be written in this field. In case of set in Secure mode by fuse configuration, this register is read_only 0 (it is not possible to redirect secure interrupts on non-secure AIC for products set in secure mode for security reasons).
After three tries, entering a wrong key results in locking the NSAIC bit. A reset is needed.
Bit 0 – NSAIC Interrupt Redirection to Non-Secure AIC
| Value | Description |
|---|---|
| 0 | Interrupts are managed by the AIC corresponding to the Secure State of the peripheral (secure AIC or non-secure AIC). |
| 1 | All interrupts are managed by the non-secure AIC. |