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PaxInstruments / labwiz-board

A development board based on the STM32 series processors specifically targeting the STM32F103RxT series.
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100R resistor in series with SWO #4

Closed charlespax closed 8 years ago

charlespax commented 8 years ago

Should we have a 100R resistor in series with SWO? See http://community.paxinstruments.com/t/pax-instruments-multilogger/167

charlespax commented 8 years ago

From stmdude:

Unless you're planning to add another SWD JTAG device on the board, there's no need to even route SWO. SWO is an output, so you can daisy-chain several SWD devices together, so you can use one JTAG to debug several chips in a system at once.

charlespax commented 8 years ago

I believe SWO is also for doing trace, so the processor can be observed while the system is running. Check out this video https://www.youtube.com/watch?v=XGmSCVgb6EM.

It's already routed and I'd like to try out trace some time, so I'll leave SWO connected. Should I keep the 100R resistor?

charlespax commented 8 years ago

I'll say yes. Closing issue.