Altera DDR SDRAM High-Performance Controllers and ALTMEMP Manuel d'utilisateur Page 77
- Page / 140
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Chapter 5: Functional Description—ALTMEMPHY 5–31
ALTMEMPHY Signals
June 2011 Altera Corporation External Memory Interface Handbook Volume 3
Section I. DDR and DDR2 SDRAM Controllers with ALTMEMPHY IP User Guide
ctl_cal_req
Input 1
When asserted, a new calibration sequence is started.
Currently not supported.
ctl_cal_byte_lane_
sel_n
Input
MEM_IF_DQS_WIDTH
×
MEM_CS_WIDTH
Indicates which DQS groups should be calibrated.
Note to Table 5–5:
(1) Refer to Table 5–8 for parameter descriptions.
Table 5–6. AFI Signals (Part 4 of 4)
Signal Name Type Width (1) Description
Table 5–7. Other Interface Signals (Part 1 of 3)
Signal Name Type Width Description
External DLL Signals
dqs_delay_ctrl_expor
t
Output
DQS_DELA
Y_CTL_WI
DTH
Allows sharing DLL in this ALTMEMPHY instance with another
ALTMEMPHY instance. Connect the
dqs_delay_ctrl_export
port
on the ALTMEMPHY instance with a DLL to the
dqs_delay_ctrl_import
port on the other ALTMEMPHY instance.
dqs_delay_ctrl_impor
t
Input
DQS_DELA
Y_CTL_WI
DTH
Allows the use of DLL in another ALTMEMPHY instance in this
ALTMEMPHY instance. Connect the
dqs_delay_ctrl_export
port
on the ALTMEMPHY instance with a DLL to the
dqs_delay_ctrl_import
port on the other ALTMEMPHY instance.
dqs_offset_delay_ctr
l_ width
Input
DQS_DELA
Y_CTL_WI
DTH
Connects to the DQS delay logic when
dll_import_export
is set
to
IMPORT
. Only connect if you are using a DLL offset, which can
otherwise be tied to zero. If you are using a DLL offset, connect this
input to the
offset_ctrl_out
output of the
dll_offset_ctrl
block.
dll_reference_ clk
Output 1
Reference clock to feed to an externally instantiated DLL. This clock
is typically from one of the PHY PLL outputs.
User-Mode Calibration OCT Control Signals
oct_ctl_rs_value
Input 14
OCT RS value port for use with ALT_OCT megafunction if you want
to use OCT with user-mode calibration.
oct_ctl_rt_value
Input 14
OCT RT value port for use with ALT_OCT megafunction if you want to
use OCT with user-mode calibration.
Debug Interface Signals (Note 1), (Note 2)
d/jointfilesconvert/1708784/bg_clk
Input 1 Debug interface clock.
d/jointfilesconvert/1708784/bg_reset_n
Input 1 Debug interface reset.
d/jointfilesconvert/1708784/bg_addr
Input
DBG_A_WI
DTH
Address input.
dgb_wr
Input 1 Write request.
d/jointfilesconvert/1708784/bg_rd
Input 1 Read request.
d/jointfilesconvert/1708784/bg_cs
Input 1 Chip select.
d/jointfilesconvert/1708784/bg_wr_data
Input 32 Debug interface write data.
d/jointfilesconvert/1708784/bg_rd_data
Output 32 Debug interface read data.
d/jointfilesconvert/1708784/bg_waitrequest
Output 1 Wait signal.
- ALTMEMPHY IP User Guide 1
- Contents 3
- Chapter 7. Latency 5
- Chapter 8. Timing Diagrams 5
- 1. About This IP 7
- Release Information 8
- Device Family Support 8
- Features 9
- Unsupported Features 10
- MegaCore Verification 10
- Resource Utilization 11
- System Requirements 12
- Installation and Licensing 13
- 1–8 Chapter 1: About This IP 14
- 2. Getting Started 15
- SOPC Builder Flow 16
- Qsys Flow 18
- Completing the Qsys System 19
- Specifying Parameters 20
- HardCopy Guidelines 21
- Generated Files 22
- 3. Parameter Settings 27
- Memory Settings 28
- ALTMEMPHY Parameter Settings 29
- Note to Table 3–3: 32
- Note to Table 3–5: 34
- PHY Settings 36
- Board Settings 38
- ■ Memory Settings 39
- ■ PHY Settings 39
- ■ Board Settings 39
- ■ Controller Settings 39
- Controller Settings 40
- 4. Compiling and Simulating 43
- Compiling the Design 44
- Simulating the Design 46
- Block Description 48
- Calibration 49
- Address and Command Datapath 49
- ), or the inverted 50
- Clock and Reset Management 51
- Notes to Table 5–4: 54
- Note to Table 5–2: 57
- Cyclone III Devices 59
- Read Datapath 66
- Note to Figure 5–6: 68
- Note to Figure 5–8: 70
- Devices 71
- GX Devices 72
- ALTMEMPHY Signals 73
- Notes to Table 5–5: 74
- Note to Table 5–5: 77
- Notes to Table 5–7: 79
- PHY-to-Controller Interfaces 80
- Altera Device 81
- -- a --b 82
- Figure 5–15. Full-Rate Reads 83
- Figure 5–16. Half-Rate Reads 83
- Notes to Figure 5–17: 85
- Notes to Figure 5–18: 86
- Notes to Figure 5–19: 87
- Notes to Figure 5–20: 88
- Preliminary Steps 89
- Design Considerations 89
- Clocks and Resets 89
- Using a Custom Controller 90
- Partial Write Operations 92
- 6. Functional Description— 95
- Avalon-ST Input Interface 96
- Command Generator 96
- Timing Bank Pool 96
- Arbitration Rules 97
- CSR Interface 98
- Data Reordering 98
- Pre-emptive Bank Management 98
- Quasi-1T and Quasi-2T 98
- User Autoprecharge Commands 98
- User-Controlled Self-Refresh 99
- DDR2 SDRAM 100
- Partial Writes 101
- Partial Bursts 102
- External Interfaces 103
- Memory Side-Band Signals 104
- Top-Level Signals Description 105
- ■ Full rate controllers 107
- ■ Half rate controllers 107
- Sequence of Operations 111
- Read Command 112
- Read-Modify-Write Command 112
- Example Top-Level File 113
- Example Driver 114
- Register Maps 116
- Controller Register Map 118
- 7. Latency 123
- 7–2 Chapter 7: Latency 124
- Note to Table 7–2: 125
- SDRAM values 126
- Handbook 127
- 7–6 Chapter 7: Latency 128
- 8. Timing Diagrams 129
- Half-Rate Read 130
- Half-Rate Write 132
- Full-Rate Read 134
- Full-Rate Write 136
- Additional Information 139
- Typographic Conventions 140
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