Altera SDC and TimeQuest API - Manual (Page 34)

2–24 Chapter 2: SDC and TimeQuest API Package and Commands
sdc
SDC and TimeQuest API Reference Manual © December 2009 Altera Corporation
reset_design
Usage
reset_design
Options
None
Description
Removes all assignments from the design. This includes clocks, generated clocks, derived clocks, input
delays, output delays, clock latency, clock uncertainty, clock groups, false paths, multicycle paths, min
delays, and max delays. After reset_design is called, the design should be in the same state as it would be
if create_timing_netlist was just called.
Example
# Constrain design
create_clock -name clk -period 4.000 -waveform { 0.000 2.000 } \
[get_ports clk]
set_input_delay -clock clk2 1.5 [get_ports in*]
set_output_delay -clock clk 1.6 [get_ports out*]
set_false_path -from [get_keepers in] -through [get_nets r1] -to \
[get_keepers out]
# Reset the design to the state that it was in before any constraints
# were entered
reset_design