Altera DDR SDRAM Controller Manuale Utente Scaricare il pdf (Pagina 98)

B–4

DDR and DDR2 SDRAM Controller Compiler User Guide © March 2009 Altera Corporation

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101 Innovation Drive 1
San Jose, CA 95134 1
Software Version: 9.0 1
Document Date: March 2009 1
UG-DDRSDRAM-10.0 2
Contents 3
1. About This Compiler 5
Features 6
General Description 6
Note to Figure 1–1: 7
Note to Table 1–3: 8
Installation and Licensing 9
OpenCore Plus Evaluation 10
2. Getting Started 11
SOPC Builder Design Flow 12
Parameterize 14
Constraints 15
Add/Update Component 15
Create Your Top-Level Design 16
Edit the PLL 17
Program a Device 18
Figure 2–1. System Naming 24
Set Up Simulation 25
Generate 25
Simulate the Example Design 27
Notes to Table 2–2: 29
Notes to Table 2–3: 30
Notes to Table 2–4: 31
Compile the Example Design 32
Implement Your Design 34
Set Up Licensing 35
Control Logic 37
Datapath 38
Device-Level Description 41
Figure 3–3. Datapath Timing 42
Designing Your Own Controller 43
DQS Group Block Diagrams 44
Notes to Figure 3–4: 45
Notes to Figure 3–5: 46
Notes to Figure 3–6: 47
Notes to Figure 3–7: 48
PLL Configurations 49
Stratix II Device 50
Stratix Device 51
Cyclone II Device 51
Cyclone Device 51
DLL Configurations 52
Example Design 52
Notes to Table 3–5: 53
Interface Description 55
Figure 3–13. Writes 56
Interfaces & Signals 57
DDR SDRAM 58
Interface 58
Local Interface 58
[1] [3][2] [5][4] 58
[1] [2] [3] [4] [6][5] 59
User Refresh Control 60
200 clock cycles 63
Note to Table 3–7: 65
Parameters 67
Controller 69
Note to Table 3–15: 71
Controller Timings 73
Memory Timings 74
Board Timings 75
Project Settings 76
Manual Timings 77
Simulation Testing 77
Hardware Testing 77
(MT46V8M16-75Z) 78
A. Manual Timing Settings 79
Resynchronization 82
Resynchronization Registers 83
Notes to Figure A–2: 84
Notes to Figure A–3: 85
Notes to Figure A–4: 86
Notes to Table A–5: 87
Note to Figure A–5: 87
DQS Postamble 88
Postamble Logic 89
System Clock 90
Postamble 90
Examples 91
Board, Cyclone II Edition 95
D. Maximizing Performance 101
Adjust the PLL Phases 102
Assign Pins 102
Place the Fedback PLL 102
Update the PLL Phases 103
Additional Information 105
Typographic Conventions 106
Preliminary 106

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Altera DDR SDRAM Controller Manuale Utente Pagina 98

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