/***********************************************************************************																																									**		BiDirectional Cell:																														**																																									**		FromCore: Value that comes from on-chip logic and goes to pin									**		ToCore: Value that is read-in from the pin and goes to core										**		FromPreviousBSCell: Value from previous boundary scan cell										**		ToNextBSCell: Value for next boundary scan cell																**		CaptureDR, ShiftDR, UpdateDR: TAP states																			**		extest: Instruction Register Command																					**		TCK: Test Clock																																**		BiDirPin: Bidirectional pin connected to this BS cell													**		FromOutputEnable: This pin comes from core or ControlCell											**																																									**		Signal that is connected to BiDirPin comes from core or BS chain. Tristate		**		control is generated in core or BS chain (ControlCell).												**																																									***********************************************************************************/module BiDirectionalCell( FromCore, ToCore, FromPreviousBSCell, CaptureDR, ShiftDR, UpdateDR, extest, TCK, ToNextBSCell, FromOutputEnable, BiDirPin);input  FromCore;input  FromPreviousBSCell;input  CaptureDR;input  ShiftDR;input  UpdateDR;input  extest;input  TCK;input  FromOutputEnable;reg Latch;output ToNextBSCell;reg    ToNextBSCell;output BiDirPin;output ToCore;reg  ShiftedControl;wire SelectedInput = CaptureDR? BiDirPin : FromPreviousBSCell;always @ (posedge TCK)begin	if(CaptureDR | ShiftDR)		Latch<=SelectedInput;endalways @ (negedge TCK)begin	ToNextBSCell<=Latch;endalways @ (negedge TCK)begin	if(UpdateDR)		ShiftedControl<=ToNextBSCell;endwire MuxedSignal = extest? ShiftedControl : FromCore;assign BiDirPin = FromOutputEnable? MuxedSignal : 1'bz;//BUF Buffer (.I(BiDirPin), .O(ToCore));assign ToCore = BiDirPin;endmodule	// TristateCell