TMS320F280049: xds 110 Aux connection

Hi,

We have assigned your query to the expert. Please expect response only by first week of January '22 due to holidays.

Thanks,

Aditya

Shengnan Li said:

Does this aux output provide 3.3V from the debug probe ?

Does the Addendum and errata to XDS110 Users Guide Section 2.4.1 help?

That has:

I have read this before, so on my design i have this connector on my board, the only purpose is to provide 3.3V for the micro on my board for debugging. however, when i connected the debugger usb side to my computer and measure pin 3 and pin 4, there is no voltage output from the debugger Aux connector.

Shengnan Li said:

however, when i connected the debugger usb side to my computer and measure pin 3 and pin 4, there is no voltage output from the debugger Aux connector.

I haven't tested it myself, but Section 3.7.3.3 - Power describes how to use the dbgjtag utility to control the power supply pins to the target board.

I think when the XDS110 is connected to the USB, it doesn't automatically supply power to the target until either a debug session is started or the dbgjtag power option is used.