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Balamurugan_V's avatar
Balamurugan_V
Icon for New Contributor rankNew Contributor
5 years ago

JTAG Detection Problem in MAX7000AE

Hello all,

I m using EPLD max 7000A series(EPM751AEBI256-7)device . I am programming the device using USB Blaster REV C in Quartus II version 13.0.It shows the following errors.

NOTE: TDI and TMS are pulled up to 3.3V with 2Kohm resistor and TCK is pulldown to ground with 2Kohm resistor.

Error: TDI connection to the first detected device UNKNOWN_E000001 might be shorted to GND.

Error: The TCK and TMS connections to the device before the first detected device UNKNOWN_E000001 might have a problem.

Info: Detected 1 device(s)

Info:Device1: UNKNOWN_E000001

In JTAG Debugger also shows TDI is shorted to GND.

Is there any other way to program?

or should I need to use any other Blaster?

In JTAG connector am giving Vref as 5V .But the VCC I/O pins of EPM751AEBI256-7 to 3.3V .Is it correct or not?

Thanks in advance.

5 Replies

    • ak6dn's avatar
      ak6dn
      Icon for Regular Contributor rankRegular Contributor
      5 years ago

      Those pullup/pulldowns should be ok.

      Are you sure your 10p JTAG connector pins are wired correctly to the MAX devices?

      I use a TerAsic USB Blaster clone on a test board I designed with a 10p JTAG connector and EPM7064S-PLCC44 and EPM7128S-PLCC84 devices and have no JTAG issues with QuartusIIweb 13.0sp1.

  • Balamurugan_V's avatar
    Balamurugan_V
    Icon for New Contributor rankNew Contributor
    5 years ago

    hello all,

    I sort out the problem .blaster is not working properly.

    Thanks for your replies.

  • JohnT_Altera's avatar
    JohnT_Altera
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    Hi,


    I am glad to hear that the issue is due to the blaster and resolved after changing the blaster.