WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:Xst:2677 - Node of sequential type is unconnected in block . WARNING:PhysDesignRules:372 - Gated clock. Clock net XLXI_29/n0102 is sourced by a combinatorial pin. This is not good design practice. Use the CE pin to control the loading of data into the flip-flop.