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New Contributor

4 years ago

Can't access JTAG Chain

i am developed customized Cyclone 5 device board. In that we are using cyclone 5 devices as "5CGXFC7C6F23I7" & Configuration device has "EPCQ512". I trying to download basic program via USB Blaster. ...

YuanLi_S_Intel

Regular Contributor

4 years ago

Hi,

Can you try with the debug steps as stated?

https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd03312011_647.html#:~:text=Check%20the%20JTAG%20chain%20connectivity,%E2%84%A2%20or%20other%20download%20cable.

So you are saying that the design works previously? But it doenst work for this newly fabricated board?

ADhar4
New Contributor
4 years ago
Ok. Thanks For support. We identified the 2 wires connection between Programmer & Board swapped. So we made 3 boards working fine.

Mean time one board is not programming, during cross verification Status pin is always low. But this pin is connected to pull up resistor with 2.5V. Also remaining boards this pin showing as 2.5V. What could be the problem?

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Can't access JTAG Chain

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