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suvarna's avatar
suvarna
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10 days ago

10CL040YF484 Programming fails

1st Vendor Batch (Date Code: 2525):           - First Test (3 FPGAs):           - Card 1: ISP and JTAG programming successful; functioning correctly.           - Card 2: Programmed in ISP mode, ...
Configuration
FvM's avatar
FvM
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8 days ago

Hi Suvarna,

thanks for clarification about MSEL1. Didn't notice jumper resistor option. As you are supplying B6 with 3.3V, MSEL can be connected to 3.3V. 2.5V should be accepted as well.

Having configuration correct, I wonder what causes failure of your board. I would probably try without C160-163 and D10/11 to be sure that they don't interfer with AS configuration load.  

Regarding 2.5 V switching regulator, I said I'd prefer LDO. it's exclusively loaded by VCCA and programming connector. Efficiency in normal operation is probably better for 3.3V supplied LDO. But your solution should work, too.

Regards
Frank

P.S.: I notice that Figure 99. Combining JTAG and AS Configuration Schemes also has 10 pF capacitors, but without additional series resistors.

  • suvarna's avatar
    suvarna
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    7 days ago

    Dear Sir,

    in previous designs also we gave same ISP and JTAG connections.  even if JTAG failure , .pof  file is loaded into EPCQ16A , atleat  then FPGA should respond . what is the critical problem here . i am unable to find out. 

    i verified voltages in bad card and working card please see below.

    Working card voltages : VCCIO = 3.32V, VCCA = 2.47V, VCCINT = 1.203V

    bad  card 1  voltages  : VCCIO = 3.305V, VCCA = 2.472V, VCCINT = 1.204V in this jtag failed but fpga responding but some of the pins are not functioning in this card.

    bad  card 2  voltages  : VCCIO = 3.29V, VCCA = 2.48V, VCCINT = 1.207V in this jtag failed,isp loaded but not responding.

    Regards

    suvarna 

     

  • suvarna's avatar
    suvarna
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    6 days ago

    Dear Sir,

    Could you kindly check power section scehmatic for fpga. is it necessary to provide power sequencing?

    pls tell us the final conclusion in our procured devives.

     

    • Farabi_Altera's avatar
      Farabi_Altera
      Icon for Regular Contributor rankRegular Contributor
      1 day ago

      Hi Suvarna, 

       

      Let me check and get back to you. 

       

  • suvarna's avatar
    suvarna
    Icon for New Contributor rankNew Contributor
    2 days ago

    Dear Sir,

    Could you kindly check power section schematic for fpga. is it necessary to provide power sequencing?

    pls tell us the final conclusion in our procured devices.