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MITO 8M Mini SOM/MITO 8M Mini Hardware/Power and Reset/System boot

8 bytes added, 17:40, 23 February 2021

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* reads the mode pins to determine the primary boot device

* once it is satisfied, it executes the boot code

=== Boot options ===

Two options are available related to system boot. They are identified by the Boot field of the ordering code as follows:

In any case, boot process is managed by on-chip boot ROM code that is described in detail in processor's Reference Manual.

==== eMMC / SD option ====

Selection of primary boot device is determined by the BOOT_MODE_SEL signal as follows:

* BOOT_MODE_SEL = 0

** in case no valid image is found on eMMC, boot ROM shall enable USB serial download mode automatically

==== NAND / SD option ====

Selection of primary boot device is determined by the BOOT_MODE_SEL signal as follows:

* BOOT_MODE_SEL = 0

** in case no valid image is found in NAND flash, boot ROM shall enable USB serial download mode automatically

====Important note for ''manufacture mode'' management====

When the internal boot and recover boot (if enabled) failed, the boot goes to the ''SD/MMC manufacture mode'' before the serial download mode.

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