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Add warning for signal line connections on debug probe #4230

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Merged
merged 4 commits into from
Nov 6, 2025
Merged

Add warning for signal line connections on debug probe #4230

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98bc643
Add warning for signal line connections
Manu3l0us Oct 28, 2025
1f89bdf
Update documentation/asciidoc/microcontrollers/debug-probe/introducti…
Manu3l0us Oct 28, 2025
7426624
Update documentation/asciidoc/microcontrollers/debug-probe/introducti…
JeuneseRPi Nov 6, 2025
9448b02
Update documentation/asciidoc/microcontrollers/debug-probe/introducti…
JeuneseRPi Nov 6, 2025
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Add warning for signal line connections 
Added a warning about connecting signal lines when using separate power sources.
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@Manu3l0us
Manu3l0us authored Oct 28, 2025
commit 98bc6434e92d6f7141e55de93d7b26914980faa3
2 changes: 2 additions & 0 deletions documentation/asciidoc/microcontrollers/debug-probe/introduction.adoc
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Expand Up @@ -34,6 +34,8 @@ Yellow:: RX/SD (Input to Probe or I/O)

While the cable with three-pin JST-SH connectors is intended to be used with the https://rpltd.co/debug-spec[standard three-pin connector] which newer Raspberry Pi boards use for the SWD debug port and UART connectors.

WARNING: When the target is supplied from a separate power source or computer, ensure a common reference before connecting signal lines. Either remove power from the target or connect GND between the target and the Raspberry Pi Debug Probe first; only after GND is connected may you attach RX, TX, SC, and SD. Potential differences between the two systems can cause destructive currents and damage the probe.

The Debug Probe has five LEDs, a red LED to indicate power, and four more activity indicator LEDs

image::images/debug-leds.png[width="70%"]
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