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Altera_Forum's avatar
Altera_Forum
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15 years ago

problem with cyclone III and jtag

I would like to put a very serious discussion about using jtag with cyclone III. has cyclone3 less electrical tolerance compared to other FPGA's?????? . we are building a custom board. and t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

It should be good. Just check that the 74LVC541 is powered by a 2.5V supply (or if you power it with 3.3V, put also 3.3V on the Jtag pin 4) and that the pull ups/down are between the JTAG connector and the buffer, and not between the buffer and the FPGA.