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ellie99
Associate
January 11, 2024
Solved

JTRST and NRST of STM32 MCU

  • January 11, 2024
  • 1 reply
  • 5276 views

Hello!
What is the difference between JTRST and NRST of stm32 mcu?
When using SWD, where should the RESET pin be connected? NRST or JTRST?

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Best answer by Sarra.S

Hello @ellie99, welcome to ST Community, 

NRST is a system reset pin, which when toggled, generates a system reset. This affects the entire system and all registers, however, JTRST is a JTAG reset pin, which is used to reset the JTAG debug interface, not the entire system.

When using SWD the reset pin should be connected to NRST 

1 reply

S
Sarra.SBest answer
ST Employee
January 11, 2024

Hello @ellie99, welcome to ST Community, 

NRST is a system reset pin, which when toggled, generates a system reset. This affects the entire system and all registers, however, JTRST is a JTAG reset pin, which is used to reset the JTAG debug interface, not the entire system.

When using SWD the reset pin should be connected to NRST 

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    ellie99Author
    Associate
    January 12, 2024

    Thank you very much for your reply. My question has been resolved.

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