# Licensed to the Apache Software Foundation (ASF) under one | |
# or more contributor license agreements. See the NOTICE file | |
# distributed with this work for additional information | |
# regarding copyright ownership. The ASF licenses this file | |
# to you under the Apache License, Version 2.0 (the | |
# "License"); you may not use this file except in compliance | |
# with the License. You may obtain a copy of the License at | |
# | |
# http://www.apache.org/licenses/LICENSE-2.0 | |
# | |
# Unless required by applicable law or agreed to in writing, | |
# software distributed under the License is distributed on an | |
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
# KIND, either express or implied. See the License for the | |
# specific language governing permissions and limitations | |
# under the License. | |
#************************************************************** | |
# This .sdc file is created by Terasic Tool. | |
# Users are recommended to modify this file to match users logic. | |
#************************************************************** | |
# Create Clock | |
create_clock -period "50.0 MHz" [get_ports FPGA_CLK1_50] | |
create_clock -period "50.0 MHz" [get_ports FPGA_CLK2_50] | |
create_clock -period "50.0 MHz" [get_ports FPGA_CLK3_50] | |
# for enhancing USB BlasterII to be reliable, 25MHz | |
create_clock -name {altera_reserved_tck} -period 40 {altera_reserved_tck} | |
set_input_delay -clock altera_reserved_tck -clock_fall 3 [get_ports altera_reserved_tdi] | |
set_input_delay -clock altera_reserved_tck -clock_fall 3 [get_ports altera_reserved_tms] | |
set_output_delay -clock altera_reserved_tck 3 [get_ports altera_reserved_tdo] | |
# Turn off warning on unconstrained LED port. | |
set_false_path -to [get_ports {LED[0]}] | |
# Create Generated Clock | |
derive_pll_clocks | |
# Set Clock Uncertainty | |
derive_clock_uncertainty |