JTRST and NRST of STM32 MCU

ellie99 · ‎2024-01-10

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?

Sarra.S · ‎2024-01-11

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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Sarra.S · ‎2024-01-11

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

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

ellie99 · ‎2024-01-12

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