QDR subsystem can be placed only in the pre-defined locations that are optimized for maximum performance. The maximum width of the QDR subsystem varies based on die/package combination and placement. For information about the QDR placement, see the PolarFire and PolarFire SoC Package Pin Assignment Tables.
The QDR subsystem location is selected using the I/O Editor. Libero assigns I/Os based on the selection of DDR memory location. The following steps explains the selection of the QDR Subsystem Location: