The mpc5748g board cannot work when it is powered on again

[Ada_Lovelace]

Hi, I'm using mpc5748g. When I'm brushing bootloader, I connect PE and can brush repeatedly in debug mode. When I unplug the debugger and power on the board again, I can't brush again. Therefore, I designed a test io. When I connect the debugger, IO is 3.5V. When I unplug the debugger and power on the board again, IO has no power. What's the reason? What's the solution? Here is my test code

[petervlna]

Hello,

What IO you are referring to? Some GPIO?

From my point of view, there is some issue with watchdog or initialization which is doing your debugger and you are not in your code.

Try some of our reference codes:

https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/MPC5-software-example-list/ta-p/1102445#MPC5748G

I would not suspect voltages, as the device is running in debug mode.

Best regards,

Peter