Is it a problem if the NJTRST pin is toggled before it is disabled and configured as GPIO (JTAG is not needed)?

[ChristophR]

Hi,

I have a design with a STM32F301 controller. I don't need JTAG, therefore I want to reuse the JTAG pins for other purposes.

Is it a problem if the NJTRST signal is toggled when the uC is starting up? Could this affect the uC operation, or does this just reset the JTAG logic without affecting the core?

As soon as the application is running, the JTAG port is disabled.

Thanks!

Best regards, 

Christoph

[waclawek.jan]

>Could this affect the uC operation, or does this just reset the JTAG logic without affecting the core?

IMO the latter.

JW