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I.MX6UL USB not working if boot from QSPI

Question asked by Qing Gu on Sep 21, 2017
Latest reply on Sep 25, 2017 by igorpadykov

If using JTAG to load my program (i.MX6UL based device) to RAM, USB works. But the same program flashed to QSPI NOR and loaded by NXP bootrom code, USB does not work. The host PC does not even detect our device. OTG1 UTMI PHY Control 0 Register is 0 indicates clock invalid. Any suggestions? Thanks.