This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83822H: How to wake up the CPU through WoL

Part Number: DP83822H
Other Parts Discussed in Thread: DP83867CR

Hi,

This is a continuation of related questions. Below is a summary of what I currently want to accomplish.
・Start the CPU through WoL.
・Before starting the CPU with WoL, the PHY power is ON, but the CPU power is OFF.
・Connect the PHY's GPIO for WoL and the enable pin of the power supply IC that supplies power to the CPU, and start the power supply IC first.
・After that, the CPU turns on and communication starts.

Generally, WoL is started using the CPU's GPIO interrupt, but the above method is somewhat irregular because WoL is performed with the CPU powered off. As you can see from the related question, it was discussed that since WoL's GPIO is a pulse output, it is necessary to configure a latch circuit in GPIO (PHY) - Enable (Power IC). However, looking at the DP83867CR data sheet, it can be seen that if WOL_OUT_MODE ="1" is set, no latch circuit is required. Is a latch circuit unnecessary to implement WoL with the above configuration?

Thanks,

Conor