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Original question:

TMS320F280049C: XDS110 disconnects due to switching noise

TMS320F2800157-Q1: TMS320F2800157-Q1 JTEG disconnection issue

Shambhu Singh
Prodigy 90 points
Part Number: TMS320F2800157-Q1
Other Parts Discussed in Thread: TMS320F2800157

I am using a TMS320F2800157EVM launch pad to connect to a TMS320F2800157 on a motor controller. JTEG is getting disconnect when I go to higher supply voltages from 24V to 48V.

Up to 30V it's working fine but for 48V I am not able to debug JTEG is getting disconnected.

Is there a setting on the debugger that is known to be more reliable in high noise environments? JTAG, SWD Mode, cTag? Or can I change any other settings to increase noise immunity?

I monitored the reset pin XRSn during debugging, please suggest how to resolve this issue 

  • 0
    TI__Genius 10886 points

    Hi Shambhu,

    Initially, there is one thing that you can do to help noise immunity of the debugger connection. Default connection on the LaunchPad is cJTAG, so recommend to use 4-pin JTAG. 2-pin cJTAG is bidirectional which can be more susceptible to noise in the system. Refer to the LaunchPad User guide for enabling JTAG which requires soldering a couple of 0-ohm resistors.

    Regards,

    Peter