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C6455 BDSL clarification

Isara
Intellectual 1130 points
Other Parts Discussed in Thread: TMS320C6455

Hi

    A customer is re-spinning an existing DSP board with TMS320C6455 on it. They are grounding RSV07 pin as we do not use EMAC RGMII interface (per recommendation from datasheet).  Will this cause a problem running JTAG as this pin is specified HIGN in the BSDL file? 

Accoring to BSDL, this pin must be at the specified level: high. The manufacturer puts this in the BSDL as a compliance enable.Some or all of the boundary scan functionality will not be available unless the compliance enables are met. Unfortunately, the manufacturer does not specify what boundary scan functionality will not be available if the compliance enables are not met (typical of most devices/compliance enables/manufacturers).

Cusotmer still have problems in their current design running DSP JTAG chain in conjunction with other JTAG chains. We have to run the DSP chain separately by itself. Is ti possible to get a BSDL file with RSV07 pin tied low simulating behavior we have? (bypassing EMAC JTAG interface)

  • 0
    TI__Guru* 84815 points

    Hi Isara

    Here is the response from the team on this

    The RSV07 pin is an enable associated with the 1.5V inputs and the reset circuit.  It should be listed in section 7.2.4 of the data sheet as a pin that should be connected to ground if RGMII is not used.  It’s listed in the BSDL file as a linkage pin so there shouldn’t be any testing associated with it.  I don’t think it will require any changes to the BSDL file.  Be sure that the proper BSDL is used for the revision of silicon and the fact that the RGMII needs to be removed.  The readme.txt file will point them towards the proper file.  

     

    Some follow up questions : In the post it is mentioned that the customer states that the BSDL defines RSV07 as high.  Where in the BSDL did they find that definition?  Which version of the file are they using?

    Regards

    Mukul

  • 0 in reply to Mukul Bhatnagar
    TI__Intellectual 1130 points

    Mukul,

            Thanks for a clarification, customer was using an older BSDL file and this caused the confusion on thier part.

    Isara