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Altera_Forum
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16 years ago

ByteBlasterII JTAG chain problem detected

Hi I´m trying to program a EP3C5E144C8N FPGA in JTAG mode using a ByteBlasterII cable. The pins are connected as indicated in the JTAG configuration of a single device using a download cable (Fig ...
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Altera_Forum
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16 years ago

Hi

I used an oscilloscope and when I press Start in the iteration test I see pulses in TCK, TDI and TMS pins, but not in TDO pin, wich is always in OV.

One doubt: TDI is in high level before press START and TCK and TMS are in low levels, but TMS is pulled up to VCCA. It doesn´t mean that TMS initial level is bad?

Thanks