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amass.9
amass.9
Associate
April 5, 2025
Question

Programming header and Debug Header for STM32L073 micro?

  • April 5, 2025
  • 1 reply
  • 732 views

Hi,

I am laying out  aboard with STM32L073. I would like to add a debug header and a programming header. Do you know which pins i should connect  these headers to?

 

I see that PA13 and PA14 are involved in debugging, but which other pins do i also need to include in the header?

1 reply

Tesla DeLorean
Tesla DeLorean
Guru
April 6, 2025

VCC and GND

NRST to allow for controlled startup

On CM3,4,7 consider PB3 / SWO, but not supported on CM0(+) parts

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amass.9
amass.9Author
Associate
April 6, 2025

Thanks, by CM3, CM4, CM7, do you mean the Cortex-M thing?

How would i know if i have a CM3 say?

The part number is

STM32L073CBU6 (LQFP48)

Andrew Neil
Andrew Neil
Super User
April 6, 2025
@amass.9 wrote:

How would i know if i have a CM3 say?

It would certainly be stated in the datasheet.

Most likely even in the marketing material; eg,

https://www.st.com/en/microcontrollers-microprocessors/stm32l0-series.html 

STM32L0 is Cortex-M0+ 

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