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== System boot ==
== Boot options ==
Two options are available related to system boot. They are identified by the ''Boot field '' of the ordering code as follows:* Boot field = 0 (SOM code: DXLxxxx'''0'''xxR): "SPI NOR / SD " option * Boot field = 1 (SOM code: DXLxxxx0xxRDXLxxxx'''1'''xxR)* 1: "NAND / SD " option (SOM code: DXLxxxx1xxR)For both options , the selection of the primary boot device is determined by the [[AXEL Lite SOM/AXEL Lite Hardware/Power and Reset/Reset scheme and control signals|BOOT_MODE_SEL ]] signal as described in the following sections. BOOT_MODE_SEL is latched when processor reset is released.
In any case, boot process is managed by on-chip boot ROM code that is described in detail in processor's Reference Manual.
