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Question asked by Alex Looi on Nov 24, 2014
Latest reply on Nov 24, 2014 by Artur Petukhov

Has anyone tested the USB over current function of iMX27?

I configure "USB_OC_B" to act as USB Host 1 over current detection pin, but when I trigger this pin, both Host 1 and Host 2 over current interrupts come in.


The USB Configuration Register settings is:



When I simulated over current on "USB_OC_B" pin, the following debug messages comes in:

GetPortStatus host 2 = 0x80001831, USBSTS=0xC48C, SysIntr=23

GetPortStatus host 1 = 0xE0501831, USBSTS=0xC08C, SysIntr=24


Anyone can advise me? Thanks in advance.