#
# constraints.fst
#
# This script sets constraints. It is called by the 
# am2910_xx.fst scripts.
#
# It will run under either the NT or UNIX environments.
#
# This script and the design can be found in the samples/Synopsys
# sub-directory of the FPGA Express installation.
#

#
# Specify the clock waveform
#
set_clock -period 20 -rise 0 -fall 10 CLOCK

#
# Create a subpath 
#
create_subpath -from_name my_from -to_name my_to -from_list /AM2910/U1\/STACK_TOP_reg<3> -to_list /AM2910/U1\/STACK_TOP_reg<1> -maxd 10 (RC,CLOCK):(RC,CLOCK)

#
# Specify delay for path groups
#
set_max_delay -path my_from:my_to 77

#
# Specify input delay relative to input pad timing group
#
set_input_delay -group "(I)" 21 "/AM2910/D<1>"

#
# Specify input delay relative to default group
#
set_input_delay 22 "/AM2910/D<2>"

#
# Specify output delay relative to output pad timing group
#
set_output_delay -group "(O)" 23 "/AM2910/Y_OUTPUT<1>"

#
# Specify output delay relative to default group
#
set_output_delay 24 "/AM2910/Y_OUTPUT<2>"


#
# Preserve the hierarchy for the module U4
#
set_module_primitive preserve "/AM2910/U4"