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TM4C1290NCPDT: USB BABBLE INT occurs in place of USB DISCONNECT INT on our mass-production board.

Part Number: TM4C1290NCPDT
Other Parts Discussed in Thread: TPS2041

Hello, we use a USB card reader connected to our TM4C1290 mass production board.

 

TPS2041 (TM4C1290) in the above diagram controls the V + voltage and turns on/off the USB card reader.

As this READER is built in our chassis, the USB cable of the READER is always connected to our TM4C1290 board.

 

If we turn off the card reader by setting V+ = 0V, “USB Disconnect interrupt” does not occur and “USB BABBLE interrupt” is generated.

Since the description of this BABBLE interrupt is empty in TivaWare, as a result, TM4C1290 seems to be hanging up.

We don’t know the reason why BABBLE INT is generated in place of “USB Disconnect INT”.

 In this case, could you please tell me how to code the routine for the BABBLE interrupt.  

 

Best regards,

ay0689