2.9.1.7.10 SD Card/e.MMC Memory Boot Configuration (Third Word)
This word is the third word used to add an external SD card/e.MMC 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 SD card/e.MMC 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. |