2.9.1.7.18 NAND Flash Memory Boot Configuration (Third Word)
This word is the third word used to add an external NAND Flash memory in the boot sequence. It allows to enable the Anti-Rollback and/or the Dual Boot mechanisms when the ROM Code is looking for a valid bootstrap file in the external NAND Flash memory.
| Name: | MEM_CFGx[2] |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ANTIROLLBACK_EN[15:8] | |||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| ANTIROLLBACK_EN[7:0] | |||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| DUALBOOT_EN[15:8] | |||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DUALBOOT_EN[7:0] | |||||||||
| Access | |||||||||
| Reset | |||||||||
Bits 31:16 – ANTIROLLBACK_EN[15:0] Enable/Disable the Anti Roll-Back Feature
| Value | Description |
|---|---|
| 0x4152 | Enables the Anti Roll-Back feature. |
| others | Disables the Anti Roll-Back feature. |
Bits 15:0 – DUALBOOT_EN[15:0] Enables/Disables the Dual Boot Feature
| Value | Description |
|---|---|
| 0x4442 | Enables the Dual Boot feature. |
| 1 | Disables the Dual Boot feature. |