Altera SDC and TimeQuest API User Manual

Page 43

Chapter 2: SDC and TimeQuest API Package and Commands

2–33

sdc

Altera Corporation

Example

# Simple input delay with the same value for min/max and rise/fall:
# 1) set on ports with names of the form myin*
set_input_delay -clock clk 1.5 [get_ports myin*]
# 2) set on all input ports
set_input_delay -clock clk 1.5 [all_inputs]

# Input delay with respect to the falling edge of clock
set_input_delay -clock clk -clock_fall 1.5 [get_ports myin*]

# Input delays for different min/max and rise/fall combinations
set_input_delay -clock clk -max -rise 1.4 [get_ports myin*]
set_input_delay -clock clk -max -fall 1.5 [get_ports myin*]
set_input_delay -clock clk -min -rise 0.7 [get_ports myin*]
set_input_delay -clock clk -min -fall 0.8 [get_ports myin*]

# Adding multiple input delays with respect to more than one clock
set_input_delay -clock clkA -min 1.2 [get_ports myin*]
set_input_delay -clock clkA -max 1.8 [get_ports myin*]
set_input_delay -clock clkA -clock_fall 1.6 [get_ports myin*] -add_delay
set_input_delay -clock clkB -min 2.1 [get_ports myin*] -add_delay
set_input_delay -clock clkB -max 2.5 [get_ports myin*] -add_delay

# Specifying an input delay relative to an external clock output port
set_input_delay -clock clk -reference_pin [get_ports clkout] 0.8 \
[get_ports myin*]