TMDSEMU110-U: Connection Issue TMSF28075

The HW is powered from an external power supply unit (24Vdc).

Inside the board we have some regulators generating the 5V and 3.3 Vdc.

The only connection between PC and board is the JTAG interface.

Waiting for your remarks I remain

Some news for me ?

Do you have some suggestions for my problem.

I need to fix it

Massimo,

I don't have any new ideas.  There seems to be some combination of debugger probe(XDS110), PCB HW, and PC HW.  There is no logical reason I can come up with why the failing XDS110 will work on the same target on a different PC.  Conversely, I'm not sure why a the good XDS110 works on what looks to be a PC that has issues.  My only suggestion would be to request for a replacement or refund from TI for the failing XDS110.

Best,
Matthew

We didn't buy the emulator from texas or one of your distributor.

How we could change them.

Moreover the problem seems to be present on all the new emulators (I tested two)

Massimo,

The only known limitation of the XDS110 is the driver on the TRSTn pin not being fully capable of driving the 2.2kOhm pulldown we recommend for C2000 users.  This can be remedied by changing to a 4.7kOhm(or larger) resistor as you have seen in your system.

If the debug probes were not purchased through TI.com or a authorized distributor were are limited in what we can do in terms of a return/replacement.  At this point I cannot think of any more debug given the factors in play when the debug probes do not work correctly.

Best regards,

Matthew