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Altera_Forum
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12 years ago

USB Blaster problem

Hello, I have a chip USB Blaster Rev C. When I program CPLD EPM7064SLC44-10 with Quartus II sp2 12.0 programmer, the process bar goes to 100% and then it shows "Failed". How can I fix this erro...
Altera_Forum's avatar
Altera_Forum
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12 years ago

...Before I didn't see the "System" log. When I tried, Programmer gave my this error: "Error: JTAG ID code specified in JEDEC STAPL Format File does not match any valid JTAG ID codes for device". Then I found some information about this problem on Altera Forum. Some guy said to connect a pull-down resistor to TCK pin.

But it did not fix the error.

I measure the voltage on the pins:

TCK = around 0 volts = constant

TDO = 4 volts = constant

TMS = around 0 volts = constant

and TDI = some signal with amplitude 1v

Also, I opened my USB Blaster and... there is no any CPLD inside. It based on uC 'Silabs' with IC 74LVC125. Maybe because it is the chip USB Blaster. I bought that in Ebay...

Thank you very much,

Yaroslav.