topic Re: MPC5748G sleep wake up problem. in MPC5xxx

MPC5748G sleep wake up problem.

my_souls — Mon, 06 Apr 2020 15:18:12 GMT

Hi,When MPC5748G currently uses WAKE-UP, it continuously enters stop mode and wakes up more than ten times. Once again, enters stop mode, and it is found that the rising or falling edge of the external hardware pin cannot wake up for the first time, but can wake up for the second time. What might be the reason for this?

Re: MPC5748G sleep wake up problem.

lukaszadrapa — Tue, 07 Apr 2020 07:30:47 GMT

Hi Kun,

it sounds like some kind of application problem. What is length of the pulse? Is there any capacitance on the wake up pin? Isn't the pulse filtered out?

Regards,

Lukas

Re: MPC5748G sleep wake up problem.

my_souls — Tue, 07 Apr 2020 11:10:06 GMT

Hi Lukas

At present, the falling edge changes from high level to low level, and there is no capacitance on the wake-up pin.

The wake-up filtering has been cancelled in the program, but the problem still exists, what operation in the program will cause this situation?

thanks

Re: MPC5748G sleep wake up problem.

lukaszadrapa — Thu, 09 Apr 2020 06:40:21 GMT

Hi Kun,

do you have any simple project to reproduce the behavior? It's not clear to me what happened.

Regards,

Lukas