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TPerm1's avatar
TPerm1
Icon for New Contributor rankNew Contributor
6 years ago

Cyclone V nCEO pin

Hi, We are using the nCEO pins in order to perform multi-device configuration. We have pulled nCEO up to VCCPGM with a 10K resistor as recommended by the document "Cyclone® V Device Family Pin Conne...
AnandRaj_S_Intel's avatar
AnandRaj_S_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi Tom,

We have to Connect the resistor to a supply that provides an acceptable input signal for the FPGA device.

VCCPGM must be high enough to meet the VIH specification of the I/O on the device and the external host.

Most important point is that the operating voltage(VCCPGM ) for the configuration input pin is independent of the I/O banks power supply, VCCIO, during configuration. Therefore, Cyclone V devices do not require configuration voltage constraints on VCCIO.

Let me know if this has helped resolve the issue you are facing or if you need any further assistance.

Regards

Anand