Selecting Oscillators And Their Connectivity - Microsemi SmartFusion2 Manual

1 – Selecting Oscillators and their Connectivity
For each oscillator that you plan to use in your design you must:
1. Select the oscillator by checking the appropriate check-box
Figure 1-1 • Select the Oscillator
2. Select the resource type - FPGA Fabric CCC(s) and/or FPGA Fabric Logic - to which the selected
oscillator(s) will be connected (as shown in
Figure 1-2 • Select the Resource
Each oscillator and each type of logic connects to a port that is exposed on the instance of this core.
Each exposed port can only be connected in SmartDesign to a port that matches the type of connection
(oscillator and connectivity type) implied by the configuration you make in this core.
For instance, if you configure an FPGA fabric CCC to use the main crystal oscillator, the input port
exposed on the CCC for the main crystal oscillator - XTLOSC_CCC_IN - can only be driven by the output
port - XTLOSC_CCC_OUT - of the Clock Oscillators core
Figure 1-3 • Crystal Oscillator to CCC Connection
(Figure 1-1)
Figure 1-2).
(Figure 1-3).
4