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

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__FORCETOC__
<section begin=Body/>
 
''TBD: sostituire le opzioni di boot con quelle disponibili nel SOC e nella Carrier''
==Boot Configurations==
ETRA Evaluation Board is built upon ''TBD:SOC'' STM32MP1 processor.
The following sections detail boot configuration options, which differ depending on the SoM.
===Available options===
Boot modes can be selected by S3 switches S1 DIP-switch which acts directly on SYSBOOT BOOT_MODE[2..0] configuration pins.
S3 S1 switches are mapped connected to SYBOOT[3[ETRA_SOM | ETRA]] BOOT_MODE[2:0] pins allowing different boot modes. [[File:ETRA_SBC-S1-boot-switch.png | 400px|thumb|center| S1 boot switches]] where S1 switches are mapped as the following table:
{| class="wikitable"
! latexfontsize="scriptsize" | Boot options order codeBOOT_MODE! latexfontsize="scriptsize" | Jumper mountedS1! latexfontsize="scriptsize" | Jumper not mountedNote
|-
| Boot from NAND BOOT_MODE0 || SD S1.1 || NAND|-| BOOT_MODE1 || S1.2 || |-| BOOT_MODE2 || S1.3 || |-| - || S1.4 || USB OTG settings
|-
| Boot from NOR || SD || NOR
|}
Same example can be found in the following table:=== DIP settings ===
{| class="wikitable"
! latexfontsize="scriptsize" | SYBOOTBOOT_MODE[32:0]! latexfontsize="scriptsize" | S1[3..1]! latexfontsize="scriptsize" | Boot sequenceperipheral
! latexfontsize="scriptsize" | Notes
|-
| 0111000|| MMC0/SPI0/UART0 OFF-OFF-OFF || USB ||'''Default''' 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
|-
| 0011101|| NAND/NANDI2C/MMC0ON-OFF-ON ||SD || '''Default''' boot from NANDSD card on SDMMC1
|-
| 1001111|| SPI0/MMC0/EMAC1ON-ON-ON || NAND ||boot from EMAC if DIVA has no NOR and no NAND flash on boardQuad-SPI
|-
|}
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