Altera V-Series Avalon-MM DMA Manual do Utilizador Página 117
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PIPE
The PIPE interface implements the Intel-designed PIPE interface specification. You can use this parallel
interface to speed simulation; however, you cannot use the PIPE interface in actual hardware.
• The Gen1, Gen2, and Gen3 simulation models support PIPE and serial simulation.
• For Gen3, the Altera BFM bypasses Gen3 Phase 2 and Phase 3 Equalization. However, Gen3 variants
can perform Phase 2 and Phase 3 equalization if instructed by a third-party BFM.
Related Information
PIPE Interface Signals on page 4-33
Data Link Layer
The Data Link Layer is located between the Transaction Layer and the Physical Layer. It maintains packet
integrity and communicates (by DLL packet transmission) at the PCI Express link level (as opposed to
component communication by TLP transmission in the interconnect fabric).
The DLL implements the following functions:
• Link management through the reception and transmission of DLL packets (DLLP), which are used for
the following functions:
• Power management of DLLP reception and transmission
• To transmit and receive ACK/NACK packets
• Data integrity through generation and checking of CRCs for TLPs and DLLPs
• TLP retransmission in case of NAK DLLP reception using the retry buffer
• Management of the retry buffer
• Link retraining requests in case of error through the Link Training and Status State Machine
(LTSSM) of the Physical Layer
8-4
PIPE
UG-01154
2014.12.18
Altera Corporation
IP Core Architecture
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- User Guide 1
- Features 3
- Interface 5
- Release Information 8
- Example Designs 9
- Debug Features 9
- IP Core Verification 9
- Related Information 10
- Altera Corporation 11
- Datasheet 11
- Send Feedback 11
- Parameter Value 17
- Directory Description 18
- Time TLP Type Payload 18
- TLP Header 18
- Creating a Quartus II Project 19
- Compiling the Design 20
- Parameter Settings 22
- Parameter Value Description 23
- Device Capabilities 28
- Error Reporting 28
- Link Capabilities 29
- MSI and MSI-X Capabilities 29
- Power Management 30
- PCIe Address Space Settings 31
- RX Master Module 36
- TX Slave Module 38
- Signal Name Directio 39
- Description 39
- Bits Name Description 41
- Clock Signals 45
- Signal Direction Description 46
- MSI Interrupts for Endpoints 51
- Serial Data Signals 53
- 9 Ch 18 Ch 54
- PIPE Interface Signals 64
- Test Signals 68
- Registers 70
- Altera-Defined VSEC Registers 77
- CvP Registers 78
- Bits Register Description 82
- Register Access Description 86
- Read DMA Example 91
- Byte Offset 95
- Register Dir Description 95
- Reset and Clocks 100
- Example Design 101
- Hard IP for PCI Express 101
- UG-01154 102
- 2014.12.18 102
- Clock Domains 104
- Data Rate Frequency 105
- Clock Summary 106
- Error Handling 107
- Physical Layer Errors 108
- Data Link Layer Errors 108
- Transaction Layer Errors 109
- Error Type Description 110
- Status Bit Conditions 112
- IP Core Architecture 114
- Hard IP for PCI Express 115
- Top-Level Interfaces 116
- Avalon-MM DMA Interface 116
- Clocks and Reset 116
- Transceiver Reconfiguration 116
- Interrupts 116
- Data Link Layer 117
- Physical Layer 119
- TX Packets 120
- Altera FPGA 122
- Qsys System 123
- Subscribe 125
- Address[31:2] 130
- Figure A-6: I/O Read Request 132
- Additional Information 136
- Date Version Changes Made 137
- How to Contact Altera 139
- Typographic Conventions 140
- Visual Cue Meaning 141
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