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#146 JTAG connection is incomplete

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vor 4 Jahren von Michael Schloh von Bennewitz geöffnet · 1 Kommentare
Michael Schloh von Bennewitz hat vor 4 Jahren kommentiert

JTAG connection is incomplete

Problem environment

Chip programming occurs over SWD or JTAG interfaces which may support various serial debugging features such as daisy chaining.

Steps to reproduce

  1. Refer to the schematic
  2. Locate programming connectors
  3. Examine for supported interfaces

Expected result

JTAG communication using TDI, TDO, TMS, TCK signals is supported.

Actual result

Only SWD communication using SWDCLK and SWDIO is supported.

Consequences

Because a full JTAG interface is required for daisy chaining, multiple hardware debuggers are needed to properly design a test jig.

Workaround

Integrate multiple hardware debuggers and connect them with USB interfaces.

Severity level

This is low priority because project requirements do not mandate a debugging interface.

# JTAG connection is incomplete ## Problem environment Chip programming occurs over SWD or JTAG interfaces which may support various serial debugging features such as daisy chaining. ## Steps to reproduce 1. Refer to the schematic 1. Locate programming connectors 1. Examine for supported interfaces ## Expected result JTAG communication using TDI, TDO, TMS, TCK signals is supported. ## Actual result Only SWD communication using SWDCLK and SWDIO is supported. ## Consequences Because a full JTAG interface is required for daisy chaining, multiple hardware debuggers are needed to properly design a test jig. ## Workaround Integrate multiple hardware debuggers and connect them with USB interfaces. ## Severity level This is **low priority** because project requirements do not mandate a debugging interface.
Michael Schloh von Bennewitz fügte das
enhancement
Label vor 4 Jahren hinzu
Michael Schloh von Bennewitz fügte das
help wanted
Label vor 4 Jahren hinzu
Michael Schloh von Bennewitz hat diesen Issue vor 4 Jahren zum Target platform regression testing Meilenstein hinzugefügt
Michael Schloh von Bennewitz fügte das
wontfix
Label vor 4 Jahren hinzu
Michael Schloh von Bennewitz hat vor 4 Jahren kommentiert
Besitzer

There is little chance of routing traces to the extra JTAG contacts within current resource levels.

There is little chance of routing traces to the extra JTAG contacts within current resource levels.
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