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Altera_Forum
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17 years ago

Combining AS and JTAG configuration schemes

Hi all ! I am a newbie in FPGA field. I am trying to design very simple Cyclone III FPGA board as follows * FPGA : EP3C10E144C7 * VCCIN : 1.2V * VCCD_PLL1,2 : 1.2V * VCCA : 2.5V * VC...
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Altera_Forum
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16 years ago

As a simple fact, nearly all cases of "can't access JTAG chain" have a very basic reason, particulary missing supply or ground connections of the FPGA, missing supply voltages, open or shorted JTAG signals.