When deployment to my G30 is unsuccessful my board enters a strange state in which my 3.3 V rail rises to 4.0 V, rapidly switching on and off. This power is ultimately coming from my separate 18 V rail, but I’m having trouble figuring out how this connection is made.
What state is a G30 put into when deployment fails? What are the pins doing?
Edit: After further testing, I have removed a USB power switch and now I cannot recreate the problem. This makes me particularly interested in what happens to VUSB when the deployment fails, or even during deployment. VUSB is not actually connected to the USB cable I am programming with in this scenario.