Skip to main content
luk
luk
Associate II
January 19, 2017
Question

NRST Hardware Question

  • January 19, 2017
  • 2 replies
  • 580 views
Posted on January 19, 2017 at 12:55

Hey,

I searched for this in the hardware development sheet but there was no real answer to my question. I do not want to use a 

switch at the NRST input, because i think everything what the switch does can be made with cutting the power. Is this correct? How should i connect the open NRST? With Pullup resistor to VDD or Capacitance to GND or both?

My Device is a STM32F405.

Thanks in advance for your help.

mark
    This topic has been closed for replies.

    2 replies

    waclawek.jan
    waclawek.jan
    Super User
    January 19, 2017
    Posted on January 19, 2017 at 13:06

    I don't know which is your device, but there is a recommended NRST connection diagram probably in every STM32's datasheet.

    JW

    Uwe Bonnes
    Uwe Bonnes
    Chief
    January 19, 2017
    Posted on January 19, 2017 at 13:09

    If you disconnect power, the RTC will reset. If you only reset, RTC will keep running. There are other registers not affected by reset, e.g. reset cause. So POR and reset are not the same.

    Terms & ConditionsAccessibility statement