Is USB Device re-enumeration necessary on iMX6ULL?

[stephenbialkows]

AN5385 says that re-enumeration is not necessary for MCUXpresso.  MCUXpresso doesn't support the cortex A cores.  But I wonder if the USB core is similar enough on the i.MX6ULL that re-enumeration is not necessary when coming out of low power mode (consistent with what is detailed in AN5385).

[igorpadykov · Accepted solution]

Hi Stephen

AN5385 describes USB device suspend state (defined by usb specification)

which is different from i.MX6ULL processor low power modes described in

Table 10-1. Low Power Mode Definition Reference Manual. In general case re-enumeration

is necessary in i.MX6ULL processor low power modes, as it can turn off processor modules.

Best regards
igor
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