TSB41BA3-EP TPA_P and TPA_N Swapped

Scott Kerstein

TSB41BA3-EP TI 1394 chip was miswired such that the TPA_P and TPA_N were swapped in cabling. Everything works fine. I can find no documentation in either the 1394 spec or in the TI spec that would allow this. Is there a problem with this miswiring?

Thanks, in advance.

over 13 years ago

0 Undrea Fields over 13 years ago

TI__Genius 10920 points

No issues exist with swapping +/- on the differential pair.

0 Scott Kerstein over 13 years ago in reply to Undrea Fields

Expert 1395 points

Thanks, where is this documented?

0 Undrea Fields over 13 years ago in reply to Scott Kerstein

TI__Genius 10920 points

This is not documented as the signals are expected to be matching as labeled. Typically, differential signals +/- channels can be swapped, but there are some cases where this may cause issues particularly in testing.

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TSB41BA3-EP TPA_P and TPA_N Swapped