ETRA SOM/ETRA Evaluation Kit/Getting started/Boot Configurations

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History
Issue Date Notes
2023/08/30 First release



Boot Configurations[edit | edit source]

ETRA Evaluation Board is built upon STM32MP1 processor.

The following sections detail boot configuration options, which differ depending on the SoM.

Available options[edit | edit source]

Boot modes can be selected by S1 DIP-switch which acts directly on BOOT_MODE[2..0] configuration pins.

S1 switches are connected to ETRA BOOT_MODE[2:0] pins allowing different boot modes.

S1 boot switches

where S1 switches are mapped as the following table:

BOOT_MODE S1 Note
BOOT_MODE0 S1.1
BOOT_MODE1 S1.2
BOOT_MODE2 S1.3
- S1.4 USB OTG settings

DIP settings[edit | edit source]

BOOT_MODE[2:0] S1[3..1] Boot peripheral Notes
000 OFF-OFF-OFF USB boot from USB OTG
001 OFF-OFF-ON NOR boot from NOR flash on Quad-SPI
010 OFF-ON-OFF eMMC boot from eMMC on SDMMC2
101 ON-OFF-ON SD Default boot from SD card on SDMMC1
111 ON-ON-ON NAND boot from NAND flash on Quad-SPI