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Altera_Forum's avatar
Altera_Forum
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15 years ago

Problem with JTAG

Hi everybody I've a problem with my MAXII I can't tranfert my program with quartus. When my CPLD is under 3V I measure an impedance of 10K on TDI and more than 1M for other between ground ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

"TMS: nothing" means, the pin is either shorted or the programmer connection broken. You have to fix this first.

P.S.:

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When my CPLD is under 3V I measure an impedance of 10K on TDI and more than 1M for other between ground and th pins.

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Seems like the design lacks the suggested TCK pulldown resistor.