1.4 Clocks

(Ask a Question)

PolarFire devices offer two on-chip RC oscillators (one 2 MHz and one 160 MHz) to generate  free-running clocks. The clocks do not have any I/O pads and do not require external components to operate.

The following table lists the number of RC oscillators available in PolarFire devices.

Table 1-14. RC Oscillator Count
Resource	Supported Range (MHz)	MPF100	MPF200	MPF300	MPF500
On-chip oscillator	2	1	1	1	1
On-chip oscillator	160	1	1	1	1

Users need to understand the regional clock implications when targeting designs that might be migrated to different device sizes. It is important that users go through the pin planning before finalizing it on the board while targeting a Die. For more information about clocking in PolarFire devices, see PolarFire Family Clocking Resources User Guide .

For information about the preferred clock inputs connectivity to PLLs, DLLs, and global clock network, see the Packaging Pin Assignment Table (PPAT).