Altera DDR Timing Wizard Manuel d'utilisateur Page 63
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Altera Corporation 3–3
November 2007 DDR Timing Wizard User Guide
Using the dtw_timing_analysis.tcl Script
Running dtw_timing_analysis.tcl Script
To run DTW, complete the following steps:
1. Open a command prompt.
2. Change the directory in the command prompt to point to the project
directory.
3. Run the dtw_timing_analysis.tcl script from the Quartus II
installation directory. The command to call the script is as follows
(provided that you have the default Quartus II installation directory
and use DTW settings saved in the project directory called
ddr_settings.dwz):
quartus_sh -t
c:\altera\<version>\quartus\common\tcl\apps\gui\dtw\
dtw_timing_analysis.tcl -dwz_file ddr_settings.dwz
Alternatively, you can copy the dtw_timing_analysis.tcl script from
the
c:\altera\<version>\quartus\common\tcl\apps\gui\dtw\
directory to your project directory and run it with the following
command:
quartus_sh -t dtw_timing_analysis.tcl -dwz_file
ddr_settings.dwz
The command listed in step 3 above is the minimum command that
you need to type to run the dtw_timing_analysis.tcl script. The
dtw_timing_analysis.tcl script has other switches that you can add
when running the script, as listed in Table 3–1.
Table 3–1. Switches in the dtw_timing_analysis.tcl Script (Part 1 of 4) Notes (1), (2)
Switch Possible Value Description Required
-dwz_file <value>
The .dwz file name Indicates which .dwz file is valid and to
be analyzed. This is the only required
field for the script.
Ye s
-? or -help
None Lists all the switches available for the
script.
No
- DDR Timing Wizard 1
- Table of Contents 3
- November 2007 4
- About this User Guide 5
- Typographic 6
- Conventions 6
- 1. About the DDR Timing 7
- Device Family 8
- 1–4 Altera Corporation 10
- Introduction 10
- Altera Corporation 1–5 11
- About the DDR Timing Wizard 11
- Note to Figure 1–1: 11
- Features 12
- 2. Getting Started 13
- Design Flow 14
- 2–2 Altera Corporation 14
- Altera Corporation 2–3 15
- Getting Started 15
- 2–4 Altera Corporation 16
- Launching the 17
- DDR Timing 17
- Entering and 18
- Editing Inputs to 18
- Recommended Data Path 19
- 2–8 Altera Corporation 20
- Altera Corporation 2–9 21
- 2–10 Altera Corporation 22
- Altera Corporation 2–11 23
- 2–12 Altera Corporation 24
- Altera Corporation 2–13 25
- Synchronous Systems 26
- Altera Corporation 2–15 27
- (Figure 2–10) 28
- Altera Corporation 2–17 29
- 2–18 Altera Corporation 30
- Analysis & Synthesis 31
- 2–20 Altera Corporation 32
- Altera Corporation 2–21 33
- 2–22 Altera Corporation 34
- Click Next 35
- 2–24 Altera Corporation 36
- Altera Corporation 2–25 37
- 2–26 Altera Corporation 38
- Altera Corporation 2–27 39
- 2–28 Altera Corporation 40
- Altera Corporation 2–29 41
- Altera Corporation 2–31 43
- 200 MHz) 44
- Altera Corporation 2–33 45
- 2–34 Altera Corporation 46
- Altera Corporation 2–35 47
- 2–36 Altera Corporation 48
- Altera Corporation 2–37 49
- 2–38 Altera Corporation 50
- Altera Corporation 2–39 51
- 2–40 Altera Corporation 52
- Altera Corporation 2–41 53
- 2–42 Altera Corporation 54
- Altera Corporation 2–43 55
- Click Finish 56
- Altera Corporation 2–45 57
- DTW Limitations 58
- 2–48 Altera Corporation 60
- 3. Using the 61
- 3–2 Altera Corporation 62
- -dwz_file <value> 63
- -? or -help 63
- -after_iptb <value> 64
- -auto_adjust_cycles 64
- -extract_tcos <value> 64
- *auk_ddr_datapath 65
- *auk_qdrii_sram_datapath 65
- *auk_rldramii_datapath 65
- -stop_after <value> 66
- -vwf_file_name <value> 66
- -write_side 66
- Altera Corporation 3–7 67
- ■ Timing Summary 67
- Altera Corporation 3–9 69
- ■ Recommended Settings 69
- Timing Closure 72
- Altera Corporation 3–13 73
- Note to Figure 3–6: 73
- DDR2/DDR SDRAM Interfaces 74
- QDRII+/QDRII SRAM Interfaces 74
- RLDRAM II Interfaces 75
- 3–16 Altera Corporation 76
- Timing Closure Process 76
- Altera Corporation 3–17 77
- Analyzer 78
- Altera Corporation 3–19 79
- 3–20 Altera Corporation 80
- Altera Corporation 3–21 81
- 3–22 Altera Corporation 82
- Changing Clock Phase Shift 83
- 3–24 Altera Corporation 84
- Altera Corporation 3–25 85
- Changing Clock Cycles 87
- 3–28 Altera Corporation 88
- Altera Corporation 3–29 89
- 3–30 Altera Corporation 90
- ° phase shift in 90
- Altera Corporation 3–31 91
- Conclusion 92
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