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3–342 Chapter 3: Tcl Packages & Commands
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Quartus II Scripting Reference Manual © July 2013 Altera Corporation
set_time_format
Usage
set_time_format [-decimal_places <decimal_places>] [-unit <unit>]
Options
-decimal_places <decimal_places>: Number of decimal places to use
-unit <unit>: Default time unit to use
Description
Sets time format, including time unit and decimal places.
Time units are assumed to be nanoseconds (ns) by default. The "-unit" option overrides the default time
units. Legal time unit values are: ps, ns, us, ms.
Time units are displayed with three decimal places by default. The "-decimal_places" option overrides the
default number of decimal places to show.
The smallest resolution of all times units is one picosecond (ps). Any additional specified precision will be
truncated.
Example
# Create two clocks with a clock period of 8 nanoseconds.
create_clock -period 8.000 clk1
set_time_format -unit ps -decimal_places 0
create_clock -period 8000 clk2
- 101 Innovation Drive 1
- San Jose, CA 95134 1
- MNL-Q2101904-9.1.1 2
- Contents 3
- Contents v 5
- Contents vii 7
- Contents ix 9
- Contents xi 11
- Contents xiii 13
- Contents xv 15
- About this Reference Manual 17
- Typographic Conventions 18
- Reference Manual 19
- Command-Line Executables 20
- Overview 21
- Tcl Commands 23
- Quartus_sta 24
- Quartus_staw 24
- Tcl Console 24
- Related Documentation 25
- 2. Command-line Executables 27
- --generate_hc_files 33
- --generate_hc_pll_delay 33
- --hc_min_archive 34
- --hc_ready 34
- --hc_review 35
- --post_map[=on 40
- --update_mif 41
- --vqm[=<.vqm file>] 41
- --write_rcf_for_vqm[=on 41
- --operation=<pb 45
- --option=<filename> 45
- --voltage=<voltage> 46
- String Description 47
- Examples 50
- --post_syn[=on 52
- --rtl[=on 52
- --hc[=on 52
- --post_fit[=on 52
- --board_symbol[=on 55
- --board_timing[=on 55
- --format=<NONE> 55
- --gen_script=<NONE> 56
- --gen_testbench 56
- --glitch_filtering[=on 56
- --resynthesis[=on 56
- --simulation[=on 57
- --timing_analysis[=on 57
- --vcd_type=<NONE> 59
- --check_ios 61
- --check_netlist 61
- --fmax=<time unit> 62
- --incremental_signaltap 62
- --inner_num=<value> 62
- --io_smart_recompile 63
- --one_fit_attempt[=on 63
- --part=<device part> 63
- --seed=<value> 64
- --signalprobe 64
- --tdc[=on 64
- --compress 67
- -a=<action to perform> 68
- --enumerate_hardware 70
- --loquacious 70
- --lib_path=<path> 74
- --parallel[=on 74
- --part=<device> 74
- --partition=<NONE> 74
- --source=<source file> 75
- --update_wysiwyg_parameters 75
- --verilog_macro=<NONE> 75
- --haltcc 78
- --initcfg 78
- --estimate_power[=on 81
- --no_input_file 82
- --archive 85
- --determine_smart_action 86
- --prepare 92
- --qboard 92
- --qinstall 93
- --qslave 93
- --relcon 94
- --restore 94
- --simlib_comp 95
- -g[=on 98
- --bank=<bank index> 98
- --grouping[=on 99
- --sso_inputs[=on 99
- Value Description 102
- --report_script=<NONE> 107
- --sdc=<NONE> 107
- --speed=<NONE> 107
- --voltage=<value_in_mV> 108
- --create_signaltap_hdl_file 110
- -c=<revision name> 110
- --combined_model[=on 114
- --create_timing_netlist 114
- --delay_annotation_only 114
- --tao[=<.tao file>] 116
- --tao_summary 116
- --tco=<time unit> 116
- --th=<time unit> 116
- --timing_analysis_only 116
- --tpd=<time unit> 117
- --tristate 117
- --tsu=<time unit> 117
- --zero_ic_delays 117
- -f=<argument file> 118
- --help[=<option 119
- --lower_priority 119
- --version 119
- Common Options 120
- Return Code Description 121
- 0 Execution was successful 121
- --rev=<revision name> 122
- -p[=on 123
- Settings File Options 124
- 2. Compiler database 127
- -t=<script file> 128
- --script=<script file> 128
- Tcl Options 129
- ■ quartus_tan 141
- Description 145
- ■ quartus 159
- ■ quartus_cdb 159
- <position>: Position 182
- <device>: Device name 225
- <family>: Family name 226
- <part>: Part name 227
- ■ quartus_sh 234
- ■ quartus_sta 234
- ■ quartus_stp 254
- # Close device 279
- $bus_name 298
- # Disables natural bus naming 298
- <command>: Command 311
- ■ export_assignments 317
- ## Close the project if open 350
- project_close 350
- # Using wildcards 358
- TSU_REQUIREMENT 2ns 368
- ■ quartus_map 401
- as an absolute time shift 418
- ■ quartus_sim 474
- Example 12 479
- Example 13 479
- Example 14 479
- Example 15 479
- Example 16 479
- Example 3 490
- Example 4 490
- Groups the specified signals 494
- -phase] [-rise] 523
- Option Destination Tool 551
- -chip Chip Planner 551
- -rpe Resource Property Editor 551
- -tmv Technology Map Viewer 551
- 0.100 -detail full_path 570
- (empty) Unknown transition 584
- R Rising output 584
- F Falling output 584
- Reports unconstrained paths 591
- MHz MegaHertz 625
- GHz GigaHertz 625
- Time Unit Description 625
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