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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.
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NOTE : sorry the part number is EPM7512AEBI256-7 in MAX 7000AE series.
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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.
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Hi,
Could you share with me your board schematic?
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hello all,
I sort out the problem .blaster is not working properly.
Thanks for your replies.
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Hi,
I am glad to hear that the issue is due to the blaster and resolved after changing the blaster.

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