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Originally Posted by NiLuJe
Don't some of those ship with a nice "USB Mode" label near some pins somewhere on the board?
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It seems that for the i.MX6, the boot mode pins do NOT need to be routed:
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For BOOT_MODE1 and BOOT_MODE0, use one of the following options to achieve logic 0:
• Tie to GND through any size external resistor.
• Tie directly to GND.
• Float.
For logic 1, use one of the following:
• Tie directly to the VDD_SNVS_IN rail.
• Tie to the VDD_SNVS_IN rail through an external resistor 10 kΩ. A value of 4.7 kΩ is preferred in high-noise environments.
If switch control is desired, no external pulldown resistors are necessary. Simply connect SPST switches directly to the VDD_SNVS_IN rail. If desired, a 4.7 kΩ to 10 kΩ series resistor can be used when current drain is critical.
Boot inputs BOOT_MODE1 and BOOT_MODE0 each have on-chip pulldown devices with a nominal value of 100 kΩ, a projected minimum of 60 kΩ, and a projected maximum of 140 kΩ.
Be aware that when these are logic high, current is drawn from the VDD_SNVS supply. In production, when on-chip fuses determine the boot configuration, both boot mode inputs can be no connects.
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Bummer...