Altera External Memory PHY Interface User Manual Page 4
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External Memory PHY Interface (ALTMEMPHY) (nonAFI) Megafunction User Guide © January 2010 Altera Corporation
Half-Rate Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Read Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Clock and Reset Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
Write Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8
Address and Command Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–9
Full-Rate Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Read Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Clock and Reset Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Write Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Address and Command Datapath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Chapter Info. Additional Information
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Info–1
How to Contact Altera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Info–2
Typographic Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Info–2
- 1
- Contents 3
- 1. About this Megafunction 5
- 2. Parameter Settings 7
- Memory Settings 8
- QDR II+/QDR II SRAM 9
- Note to Table 2–3: 12
- Note to Table 2–5: 13
- Emulated Device 14
- Actual Device 14
- Figure 2–4. Preset Editor 15
- (nonAFI) 17
- PHY-to-Controller Interfaces 20
- Initialization Timing 21
- Note to Figure 3–5: 23
- ALTMEMPHY Signals 25
- Notes to Table 3–1: 26
- Note to Table 3–2: 27
- Notes to Table 3–5: 28
- Note to Table 3–6: 31
- Note to Table 3–7: 33
- Note to Table 3–8: 35
- QDR II+/QDR II SRAM Signals 36
- Note to Table 3–11: 37
- Note to Table 3–14: 39
- Note to Table 3–15: 39
- Understanding the Testbench 41
- Functional Memory Use 42
- Figure 3–6. Example Testbench 44
- Initialization Stage 45
- Write Training Data Stage 47
- Read Calibration Phase 49
- Functional Memory Use Stage 53
- Additional Debug Signals 55
- Calibration Status Interface 56
- Design Considerations 57
- Local Interface Requirements 58
- Notes to Figure 3–12: 59
- Notes to Figure 3–13: 61
- Notes to Figure 3–14: 64
- Notes to Figure 3–15: 66
- DDR2/DDR SDRAM 69
- Clock and Reset Management 71
- Stratix II GX devices use 73
- Notes to Table 4–1: 74
- Write Datapath 76
- Address and Command Datapath 77
- ), write_clk_2x (270), or 78
- Full-Rate Support 79
- Additional Information 81
- How to Contact Altera 82
- Typographic Conventions 82
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