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JSieg4's avatar
JSieg4
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6 years ago

How to tri-state the configuration pins after configuration with CycloneV?

Hello, We work with a CycloneV in active serial configuration mode. The EPCS config flash is connected to the FPGA and also in parallel to an external microcontroller. The idea is to update the FPG...
JSieg4's avatar
JSieg4
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6 years ago

Hi WolfGang,

Unfortunately I cannot send you the whole design because it is confidential. But please find the following screenshots.

apart from that we do not use special settings.

Regards

ShafiqY_Intel's avatar
ShafiqY_Intel
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hi JSieg4,

Can you check your .qsf file whether this option is enable or not?

(following assignment indicate this option is enable(red circle) )

One more thing, how do you determine whether this pins ( DATA0, nCSO and DCLK) tri-state or not?

Did you scope the waveform of this pins? if yes, can you share the picture of the waveform?

Cheers