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7 Series DCI - What are the supported values of the external reference resistors VRN and VRP?
There are three types of DCI:
- Controlled Impedance Driver (Source Termination)
- Controlled Impedance Driver with Half Impedance (Source Termination)
- Split-Termination DCI (Thevenin Equivalent Termination to VCCO/2)
how should I select the value of the external reference resistors?
For the spilt termination and the DIV2 Controlled
Impedance driver DCI the supported values for the VRN/VRP resistors are 80, 100
or 120 Ohms.
For the Non-DIV2 Controlled Impedance Driver DCI, the VRN/VRP
resistors should be 40, 50 or 60 ohm.
The tolerance for the resistors are 1%.
- Virtex-7 HT