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imx27 - USB Over Current

Question asked by ALEX LOOI on Nov 24, 2014
Latest reply on Nov 25, 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:

USB_CTRL(600h)=0x59494030.

 

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.

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