Microsemi IGLOO2 - Figure 59 Expected Results from Simulations (Eye Diagram, Eye Contour, and Bath Tub Curve); Figure 60 Eye Mask for Pcie 2.0; Table 21 Specifications of the Received Signal for Pcie

Layout Guidelines for SmartFusion2- and IGLOO2-Based Board Design
AC393 Application Note Revision 14.0 62
This simulation is on the SmartFusion2 Development Kit using the Sigrity tool and the waveforms are
shown in the following figure. The simulation result shows that it meets the PCIe 2.0 requirements.
Figure 59 • Expected Results from Simulations (Eye Diagram, Eye Contour, and Bath Tub Curve)
The following table lists the specifications of the received signal for PCIe.
For more information about PCIe 2.0 base specification, see
www.pcisig.com/members/downloads/specifications/pciexpress/PCI_Express_Base_r2_1_04Mar09.pdf
To know whether or not the system is meeting the requirements, the eye mask can be imported.
Specifications of eye mask depend on the application the system is using. For example, PCIe 1.0, PCIe
2.0, XAUI, and SGMII. A typical eye mask for PCIe 2.0 is shown in the following figure.
Figure 60 • Eye Mask for PCIe 2.0
For more information about IBIS-AMI model, see AC292- IBIS Models- Background and Usage
Application Note.
Table 21 • Specifications of the Received Signal for PCIe
Bit Rate Min Height of the Eye at RX Min Width of the Eye at RX
2.5 Gbps 175 mV 0.6 UI
5 Gbps 120 mV 0.6 UI
142 ps
120 mV
50 ps