4.4.1 IBIS-AMI Simulation

IBIS-AMI simulation was performed on one of the traces going from the PolarFire FPGA TX to the SFP male connector. And, the eye diagram was captured at the connector. The simulation topology is shown in the following figure.

Figure 4-9. IBIS-AMI Simulation Topology
Note: The IBIS-AMI models are available at www.microsemi.com/products/fpga-soc/design-resources/ibis-models/ibis-models-polarfire.
The simulations parameters for IBIS-AMI are as follows:
  • TX amplitude: 400 mV
  • De-emphasis: 0 dB
  • Driver impedance: 100 ohms

The following figure shows the eye diagram, which included the SFP compliant eye mask. The eye diagram passes the SFP eye mask specification in the simulation. The eye diagram indicates that the trace is optimized for all discontinuities.

Figure 4-10. Eye Diagram