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# -*- tcl -*-

# $Id: cdc_pulse.xdc 757 2016-04-02 11:19:06Z mueller $

#

# Copyright 2016- by Walter F.J. Mueller 

# License disclaimer see LICENSE_gpl_v2.txt in $RETROBASE directory

#

# cdc constraints for cdc_pulse

#

# Revision History:

# Date         Rev Version  Comment

# 2016-03-28   756   1.0    Initial version

#

set clkm [get_clocks -of_objects  [get_cells RM_ACK_S0_reg]]

set clks [get_clocks -of_objects  [get_cells RS_REQ_S0_reg]]

#

# CLKM->CLKS

# capture REQ

set_max_delay \

  -from [get_cells -regexp "RM_REQ_reg"] \

  -to   [get_cells -regexp "RS_REQ_S0_reg"] \

  -datapath_only   [get_property -min PERIOD $clks]

#

# CLKS->CLKM

# capture ACK

set_max_delay \

  -from [get_cells -regexp "RS_REQ_S1_reg"] \

  -to   [get_cells -regexp "RM_ACK_S0_reg"] \

  -datapath_only   [get_property -min PERIOD $clkm]