SK-AM62: Why two Ethernet and PMIC interrupts to the same GPIO pin of AM62

Hello Rain Wang,

Thank you for the query.

Rain Wang said:

What are the considerations for connecting two Ethernet and PMIC interrupts to the same GPIO pin of AM62?

Availability of pins on the EVM is one of the consideration.

Could you help me understand the use case or the context of the query.

Regards,

Sreenivasa

Hello  Kallikuppa Sreenivasa,

Thanks for your reply, our hardware engineers refer to EVM for design, so I would like to know how to distinguish which hardware triggered an interrupt signal if one arrives？

Hello Rain Wang,

Thank you for the inputs.

The EXTINTn connection in the SK-AM62 is a place holder connection and this has not been tested.

If you have unused IOs you could connect the interrupts to any of the other IOs.

Please note the EXTINTn is an open drain type buffer IO. 

The EXTINTn, is a fail-safe IO terminal.

Regards,

Sreenivasa

Hello Rain Wang,

Looks like i did not answer the below question.

wei yufeng said:

so I would like to know how to distinguish which hardware triggered an interrupt signal if one arrives？

After the interrupt occurs, the 2 PHYs interrupt status register has to be read using the MDIO interface to resolve the interrupt source.

Regards.

Sreenivasa