This should be the last boot option because it does not currently support timeouts or retries. a Linux RAM-disk) instead of the normal boot. `RPIBOOT` is intended for use with Compute Module 4 to load a custom debug image (e.g. | 0xf | RESTART | Restart from the first boot-mode in the BOOT_ORDER field i.e. A power cycle is required to exit this state. | 0xe | STOP | Stop and display error pattern.

See (bootmodes/nvme.md) for more details. | 0圆 | NVME | CM4 only: boot from an NVMe SSD connected to the PCIe interface. | 0x5 | BCM-USB-MSD | USB 2.0 boot from USB Type C socket (CM4: USB type A socket on CM IO board, using bootloader EEPROM from onwards). | 0x4 | USB-MSD | USB mass storage boot - See (bootmodes/msd.md) | | 0x2 | NETWORK | Network boot - See (bootmodes/net_tutorial.md) | | 0x1 | SD CARD | SD card (or eMMC on Compute Module 4). | 0x0 | SD CARD DETECT | Try SD then wait for card-detect to indicate that the card has changed - deprecated now that 0xf (RESTART) is available. It is read right to left and up to 8 digits may be defined. The BOOT_ORDER property defines the sequence for the different boot modes. The minimum supported bootloader version for custom boot modes is. The boot modes are attempted in lowest significant nibble to highest significant nibble order. It is represented as 32bit unsigned integer where each nibble represents a boot mode. The `BOOT_ORDER` setting allows flexible configuration for the priority of different boot modes.

This behaviour is enabled by default, however, `WAKE_ON_GPIO=2` may be set to use an external GPIO power button instead of the dedicated power button. Pi 400 has a dedicated power button which operates even if the processor is switched off. `GLOBAL_EN` must be shorted to ground to boot. This is lowest possible power state for halt but may cause problems with some HATs because 5V will still be on. If `1` and `WAKE_ON_GPIO=0` then `sudo halt` will switch off all PMIC outputs. If `1` then `sudo halt` will run in a lower power mode until either GPIO3 or GLOBAL_EN are shorted to ground.ĭefault: `1` (`0` in original version of bootloader ) Configure the receiving debug terminal at 115200bps, 8 bits, no parity bits, 1 stop bit. If `1` then enable UART debug output on GPIO 14 and 15. (././configuration/config-txt/conditional.md) are also supported except for EDID. The syntax is the same as (././configuration/config-txt/) but the properties are specific to the bootloader.

This section describes all the configuration items available in the bootloader. Please see the (booteeprom.md) page for more information about the EEPROM update process. To edit it and apply the updates to latest EEPROM release: To view the current EEPROM configuration: Releases prior to the default/critical release will not support all features listed here. # Raspberry Pi 4 bootloader configurationīefore editing the bootloader configuration, (././raspbian/updating.md) to get the latest version of the `rpi-eeprom` package.

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