16.7.1 Boot Code Flags Register
| Name: | BOOT_FLAG |
| Offset: | 0x800 |
| Reset: | 0xFFFF_FFF9 |
| Property: | R/P |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| PUFSCORE[2:0] | |||||||||
| Access | R/P | R/P | R/P | ||||||
| Reset | 1 | 1 | 1 | ||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| RAM_INIT_ENB | BOOTMODE | DICEDIS | PUFSTARTUP | PUFRETRY | |||||
| Access | R/P | R/P | R/P | R/P | R/P | ||||
| Reset | 1 | 1 | 1 | 1 | 1 |
Bits 10:8 – PUFSCORE[2:0] PUF Score Value
| Value | Description |
|---|---|
| 000 | 0 |
| 001 | 1 |
| 010 | 2 |
| 011 | 3 |
| 100 | 4 |
| 101 | 5 |
| 110 | 6 |
| 111 | 7 |
Bit 6 – RAM_INIT_ENB RAM ECC Enable
When set to ‘1’, ECC on RAM will be enabled.
| Value | Description |
|---|---|
| 0 | Disable ECC on RAM |
| 1 | Enable ECC on RAM |
Bit 4 – BOOTMODE Boot Mode
On this device, this bit must be programmed by the tools as “1”, specifying single boot. This bit not shown in data sheet.
| Value | Description |
|---|---|
| 0 | Dual Boot (Enables FWMD Descriptor BFMSWAP) |
| 1 | Single Boot |
Bit 3 – DICEDIS Device Identifier Composition Engine Disable
| Value | Description |
|---|---|
| 0 | Enable DICE flow, Enable PUF |
| 1 | Disable DICE flow |
Bit 2 – PUFSTARTUP PUF Start Up Mode
| Value | Description |
|---|---|
| 0 | Normal startup, wait for PUFRAMUPTIME time |
| 1 | Fast startup, do not wait for PUFRAMUPTIME (FCCFG61) time |
Bit 1 – PUFRETRY PUF Retry
| Value | Description |
|---|---|
| 0 | No Retry |
| 1 | RAM Power Cycle Retry |