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Original question:

UCD3138A64OEVM-662: No ROM detected

No ROM detected

Zi123D CH123KHA
Prodigy 110 points
Part Number: UCD3138A64OEVM-662

Good Morning I have the same card , 

when I put the USB , it's okay the LED is on  , But when I use Device GUI it say that no rom detected unable to communicate with rom , device may be in flash mode .

Please help me  , the GUI can not recognise my card i don't dowloaded any program

Always i have red errors even i click scan device in rom mode also device id same problem 

pleasse help it's urgent

thank u 

  • 0
    TI__Genius 14580 points
    Hello,

    Make sure the device is placed properly. Measure BP18 in the good voltage? Measure PMBus Data and Clock are pulled high?

    Regards,
    Sean
  • 0 in reply to Sean Xu
    Prodigy 110 points

    Thanks for  your prompt reply !

    I changed the position of the jumper of my card of PMBUS DATA and CLK .

    And I got this  , when I do scan  device  :  

    I thought , it worked , I tried to dowload some example of labs  but it didn't work .

    I retried to scan the device and then " command rom to execute its program (sendbyte 0xF0 to adress 11) but no improvement :/   

    what can I do  , thank you  

  • 0 in reply to Zi123D CH123KHA
    TI__Expert 4070 points
    Hello it looks like you have gotten the device in ROM mode and have successfully downloaded the program. An engineer will offer further advice.
  • 0 in reply to Amiel Hussain
    TI__Genius 17090 points
    If you look at main.c in the lab, it will probably say this:

    // enable JTAG
    MiscAnalogRegs.IOMUX.all = 0;

    //---------------------------------------------------------------------------
    // IMPORTANT: READ BELOW, OR CODE MAY NOT EXECUTE CORRECTLY
    //---------------------------------------------------------------------------
    // tie pin FAULT3 to ground for normal operation
    // tie pin FAULT3 to 3.3V to clear checksum

    I hope it is also mentioned in the video. If you tie the fault 3 pin to ground, this will probably solve your problem. This is the ROM backdoor, which we encourage you to use. It is very easy to mess up the program after this point, and set the checksum and lock up the device. With this, you have a reasonable chance to be able to recover. It's still not fool proof, though.