The hard PHY connects to the hard memory controller and the core, enabling the use of either the hard memory controller or a software-based controller. (You can have the hard controller and hard PHY, or the soft controller and soft PHY; however, the combination of soft controller with hard PHY is not supported.) The hard PHY also connects to the I/O register blocks and the DQS logic. The path between the hard PHY and the I/O register blocks can be bypassed, but not reconfigured—in other words, if you use the hard PHY datapath, the pins to which it connects are predefined and specified by the device pin table.
Did you find the information on this page useful?