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→System boot
The iMX93x SoC uses some GPIOs to read the boot configuration set on the SOM: for this reason the SOM's ports UART1_TXD, UART2_TXD, SAI1_TXFS and SAi1_TXD0 are floating (high impedance) while CPU_PORn signal is low.
[[File:AURA-boot-opt.png | 800px]]
==== SPI NOR / SD option ====