Man Page - rbx_report_xtalk_clock_nets

Rubix STA-Setup PrimeTime Custom Command, ARM Ltd.

	NAME
	  rbx_report_xtalk_clock_nets
                 Reports clock nets with cross talk effects on them.

	SYNTAX
	  rbx_report_xtalk_clock_nets [-ccap_threshold cap_value] [-omit_clocks clocks_list] [-include_position] [-output_style csv | table]

	ARGUMENTS
	  -ccap_threshold cap_value
		Any clock net with a coupling capacitance above this limit will be
		reported. The value of "cap_value" is in library unit.

	  -include_position
		If this switch used then the report contains as extra "position column" that
		has the position of the net in the clock tree. If a reported clock net is driven
		by the clock root i.e. the clock definition point then its position will be 10
		and if the net is a leaf net that connects to the clock pin of a sequential cell
		then its position will be 0. All reported clock nets will have postion ranging from
		0 to 10 depending on whether they are closer to clock root or leaves.

	  -omit_clocks clocks_list
		This option becomes effective only when "-include_position" option is used.
		This command looks at all the clocks that go through a given net and then determine
		the size of the clock tree by calculating all the leaves in the transitive fanout of
		these clocks (say N_all_ffs). Then it calculates the number of leaves in the transitive
		fanout of the net (say N_net_ffs). Finally it calculates the position with the formula
		10*(N_all_ffs/N_net_ffs). Now if a net propagates say functional clock, fclk that clocks
		10% of the design and a scan shift clock, sclk that clocks 100% of the design then N_all_ffs
		will be the number of flipflops in the design. But in fact it should be the number of
		flipflops in the clock tree of fclk. Hence to discount sclk form this calculation and to
		find out the position of the net in the clock tree of fclk "-omit_clocks sclk" switch can
		be used.

	  -output_style table | csv
		Default: table
		o table - Displays the output in table format which is more
		  suitable for visual inspection than csv option.
		o csv - Displays the output in csv format which is more
		  suitable for post processing.

	DESCRIPTION
		This commands looks at all clock nets in the design and checks if there are
		coupling-capacitcance(ccap) in each net. If a given net has ccap then this
		command collectes a few useful information about the net. It prints these information
		if the ccap is higher than that specified by the user using -ccap_threshold option.
		If the -include_position is used then the run times can be long depending on the size of the
		design.

	EXAMPLE
                Following command prints the cells that do not belong to given cts_lib_list
		in table format.

		pt_shell> rbx_report_xtalk_clock_nets -ccap_threshold 0 -omit_clocks scan_clk -include_position

		*********************************************************************************************
		 Rubix Custom Report

		 Report    : rbx_report_xtalk_clock_nets
		            -ccap_threshold 0
			    -include_position
      			    -output_style table
		 Design    : my_design
		 Version   : J-2014.06-SP3
		 Date      : Mon May 25 16:09:56 2015
		*********************************************************************************************
		# Note: -Violating nets and their ccaps are stored in "xtalk_clk_nets" and "xtalk_clk_nets_values" tcl lists
		#       -Position ranges from 0 to 10. 0 -> leaf ; 10 -> trunk
		*********************************************************************************************
		#Coupling-Cap    CCap %     Agrsr-Count     Position     Driver-Ref-Name      Net         Driver-Name   Clocks
		#------------    ------     -----------     --------     ---------------      ---         -----------	------
		0.020		 40	    15		    10		 NAND2_X1A_A9TS_C31   n33	  u_g323/Y	aclk, bclk
		0.020		 40	    15		    10		 INV_X1A_A9TS_C31     n51	  u_g420/Y	aclk, bclk

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Rubix STA-Setup PrimeTime Custom Command, ARM Ltd.