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TMS320C5515 EMIF GPIO CONFIGURATION

Vinod Kumar5
Prodigy 155 points
Other Parts Discussed in Thread: TMS320C5515

Hi,

      We are using TMS320C5515 in our design.

      We have powered DVDD EMIF bank & we are using multiplexed GPIO's with EM address.

     As per datasheet, We have grounded some of the pins to prevent current drain.

    

  TMS320C5515 Processor is getting too much & Consumes around 800mA.

  But we could able to program as well as all power rails are good.

   We are suspecting that this grounded pins are configured default as Output & draining more current.

   Please help to get configuration resistors for configuring as High Impedance state.

Any idea for Processor heat reduction?

  • TI__Mastermind 23785 points

    Frankly, it is as easy as 1-2-3:

    1) Rule of thumb to handle unused pins: http://processors.wiki.ti.com/index.php/C5505/15/35_Schematic_Checklist#Recommendations_Specific_to_C5504.2F05.2F14.2F15.2F32.2F33.2F34.2F35

     

    2) Refer to C5515 data manual's "EMIF Terminal Functions" section to determine the I (input) and I/O/Z (tri-state) pins;

    3) Assuming you will not program the EMIF pins, refer to data manual's "Pin Behavior at Reset", follow the rules in step #1 to pullup / pulldown all input and Z pins. Output pins can be left floating.

    Regards.

  • in reply to Steve Tsang
    Prodigy 155 points

    Hi Steve,

                    Thanks for your immediate reply.

                    As per Datasheet, It is mentioned as EMIF pins can be configured as output or  Hi Impedance.

                   Please help to config in high impedance.

                  Is it possible to disable EMIF through software?

  • in reply to Vinod Kumar5
    TI__Mastermind 23785 points
    Asked in another ost. Please keep same question in one posting.Regards.