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TM4C1294NCPDTI - Heating Issue

Krishnan G Nair
Expert 1235 points

Other Parts Discussed in Thread: TM4C1294NCPDT

Hello,

We are using Tiva series TM4C1294NCPDTI controller which is communicating  through EPI and Ethernet interface. While controller reading data from FPGA through EPI it is getting so much heat as much even cant touch  my finger on  IC .. but it is working...  

we tried by disabling unused sysctrl peripherals,dsb,udma,adc,can,i2c,ssi,watchdogtimer.......................... but didnt work

Pl help what are solutions to reduce the temp on IC?  wat are all things we should disable by software?

Advance thanks.......

Regards,

Krishnan

  • 0
    TI__Guru**** 244440 points
    Hello Krishnan,

    Did you measure the current being sourced to the TM4C1294NCPDT?

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Guru 47900 points
    You may want to measure that MCU's 3V3 is proper, too.

    You speak of EPI & FPGA - are you certain that no "bus contention" is occurring? Heat buildup - when reading data from, "FPGA through EPI" is a sure sign of mismatched data direction and/or improper signal levels.

    Always - a description of the method you're employing to power both your MCU and the (likely) FPGA board/card is necessary. If powering everything from a basic launch/eval board - you've (very) likely exceeded the output capability of the launch/eval board.

    Some attention to detail - in both your basic system power design/distribution - and reporting here - is required for proper diagnosis...