JTAG connection to TMS320DA808

Rajarama M Bhat

Hi,

I intend to use XDS510 USB JTAG Emulator from Spectrum Digital for the JTAG connection to TMS320DA808. I will be connecting only 6 pins out of 14 pins to TMS320DA808 ie. TCK, TMS, TDI, TCK, 2V5(POWER), GND . Can somebody please tell me if I will be missing any of the JTAG emulation functionalities?

Thanks,

Rajaram

over 13 years ago

0 Rajarama M Bhat over 13 years ago

Intellectual 550 points

Sorry for the misleading question. Question I wanted to ask was: will a JTAG interface design meant for TMS320DA808 , work for TMS320DA828?

0 Urmil Parikh over 13 years ago in reply to Rajarama M Bhat

TI__Intellectual 1870 points

Yes.

0 Tufino over 13 years ago in reply to Urmil Parikh

TI__Intellectual 2350 points

Hi,

For a DA808, you are fine with the hookup that you describe. Just remember to tie the TCK signal to the pin for "RTCK" (sometimes called "TCKRET") at the JTAG header. In other words at the header TCK and TCKRET should be tied together.

If you're hooking up a DA828, however, you need to connect the DSP's RTCK pin to the RTCK/TCKRET pin on the header. Because the DA828 has an ARM, you need that signal connected for adaptive clocking.

Bobby T.

0 Rajarama M Bhat over 13 years ago in reply to Tufino

Intellectual 550 points

Hi Bobby,

Thanks for the help.Keeping the same connections as the TMS320DA808 I am able to detect the TMS320DA828 in CounterITckr -TCK mode using both SDConfigEx and CCSv5. In other TCK modes it is not detecting the device. For normal operations do we absolutely need to connect DSP's RTCK pin to RTCK/TCKRET pin on the header? Because we are in the initial stages of software development and basically we need only DSP in TMS320DA828. In case if we need to connect DSP's RTCK pin to RTCK/TCKRET pin on the header, then will it be fine if we wire it externally?

Thanks ,

Rajaram

0 Tufino over 13 years ago in reply to Rajarama M Bhat

TI__Intellectual 2350 points

If you're doing DSP only, you probably don't need to take RTCK to the header. You can short TCK to TCKRET probably. If you do want to hook it up via a wire that's OK.

0 Rajarama M Bhat over 13 years ago in reply to Tufino

Intellectual 550 points

Hi Bobby,

We connected DSP's RTCK to RTCK/TCKRET pin on the header through an external wire . Then it started working even in the "counter" TCK mode.

Thanks a lot for the useful inputs.

Rajaram

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JTAG connection to TMS320DA808