7.2 Boot Response Format
The following frame format is used for boot responses.
The header field is formed by the first 15 bits and it contains the boot signature data (0b010101100011010). This data is fixed by the PL360 device and it is used to identify the status of the PL360 device.
The flags field contains information about the reset type of the last reset event:
- USER_RST: User reset
- CM7_RST: Cortex reset
- WDG_RST: Watchdog reset
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
| 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 |
| 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| 0 | 0 | 1 | 1 | 0 | 1 | 0 | USER_RST |
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| CM7_RST | WDG_RST | – | – | – | – | – | – |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| – | – | – | – | – | – | – | – |