Altera V-Series Avalon-MM DMA Instrukcja Użytkownika Strona 49
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Signal Direction Description
int_status[3:0]
Output These signals drive legacy interrupts to the Application Layer as
follows:
• int_status[0]: interrupt signal A
• int_status[1]: interrupt signal B
• int_status[2]: interrupt signal C
• int_status[3]: interrupt signal D
ko_cpl_spc_data[11:0]
Output The Application Layer can use this signal to build circuitry to
prevent RX buffer overflow for completion data. Endpoints must
advertise infinite space for completion data; however, RX buffer
space is finite. ko_cpl_spc_data is a static signal that reflects the
total number of 16 byte completion data units that can be stored
in the completion RX buffer.
ko_cpl_spc_
header[7:0]
Output The Application Layer can use this signal to build circuitry to
prevent RX buffer overflow for completion headers. Endpoints
must advertise infinite space for completion headers; however,
RX buffer space is finite. ko_cpl_spc_header is a static signal
that indicates the total number of completion headers that can be
stored in the RX buffer.
l2_exit
Output L2 exit. This signal is active low and otherwise remains high. It is
asserted for one cycle (changing value from 1 to 0 and back to 1)
after the LTSSM transitions from l2.idle to detect. When this
pulse is asserted, the Application Layer should generate an
internal reset signal that is asserted for at least 32 cycles.
lane_act[3:0] Output Lane Active Mode: This signal indicates the number of lanes that
configured during link training. The following encodings are
defined:
• 4’b0001: 1 lane
• 4’b0010: 2 lanes
• 4’b0100: 4 lanes
• 4’b1000: 8 lanes
ltssmstate[4:0]
Output LTSSM state: The LTSSM state machine encoding defines the
following states:
• 00000: Detect.Quiet
• 00001: Detect.Active
• 00010: Polling.Active
• 00011: Polling.Compliance
• 00100: Polling.Configuration
• 00101: Polling.Speed
4-18
Reset, Status, and Link Training Signals
UG-01154
2014.12.18
Altera Corporation
Interfaces and Signal Descriptions
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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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