6 Appendix A: Special Layout Guidelines—Crystal Oscillator

The placement of the crystal needs to be close to the SmartFusion2 or IGLOO2 device. Two capacitors are placed symmetrically around the crystal so that the lengths from the crystal pad to capacitor are equal, as shown in the following figure. Two traces from crystal to SmartFusion2/IGLOO2 devices should have equal lengths.

Figure 6-1. Layout of the Crystal Oscillator
Figure 6-2. Schematics of Crystal Oscillator