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SWD timing requirement

ikeken
Associate II

I cannot find any timing requirements for SWDIO or SWCLK in the datasheet, STM32L433. Where can I find this information?
I don't think there is any cause for concern since I am only connecting the STLINK. However, in mass production, the wiring tends to be longer and the waveforms tend to be smoothed out as a countermeasure against ringing. Therefore, I would like to check the timing constraints explicitly.

Thank you

1 REPLY 1
TDK
Super User

The frequency of SWD signals is configurable and can be quite slow. You should be able to find a setting that works.

TDK_0-1755520850675.png

 

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