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Bit(s) Field Description
[6:4] multiple message
enable
This field indicates permitted values for MSI signals. For example,
if “100” is written to this field 16 MSI signals are allocated.
• 3’b000: 1 MSI allocated
• 3’b001: 2 MSI allocated
• 3’b010: 4 MSI allocated
• 3’b011: 8 MSI allocated
• 3’b100: 16 MSI allocated
• 3’b101: 32 MSI allocated
• 3’b110: Reserved
• 3’b111: Reserved
[3:1]
multiple message
capable
This field is read by system software to determine the number of
requested MSI messages.
• 3’b000: 1 MSI requested
• 3’b001: 2 MSI requested
• 3’b010: 4 MSI requested
• 3’b011: 8 MSI requested
• 3’b100: 16 MSI requested
• 3’b101: 32 MSI requested
• 3’b110: Reserved
[0] MSI Enable If set to 0, this component is not permitted to use MSI.
Related Information
• PCI Express Base Specification 2.1 or 3.0
• PCI Local Bus Specification, Rev. 3.0
Configuration Space Register Access Timing
Figure 4-8: tl_cfg_ctl Timing
The following figure shows typical traffic on the tl_cfg_ctl bus. The tl_cfg_add index increments on
the rising edge of the pld_clk. The address specifies which Configuration Space register data value is
being driven onto tl_cfg_ctl.
pld_clk
tl_cfg_add[3:0]
tl_cfg_ctl[31:0]
2 3 4 5 6 7 8 9 A B 8 9 A B C D E
00... 00... 00... 7F...
00000000 00000000
00... 00...
4-26
Configuration Space Register Access Timing
UG-01097_avmm
2014.12.15
Altera Corporation
64- or 128-Bit Avalon-MM Interface to the Application Layer
Send Feedback
- User Guide 1
- Datasheet 2
- Features 3
- Interface 4
- Release Information 7
- Device Family Support 7
- Altera FPGA 8
- Debug Features 10
- IP Core Verification 10
- Recommended Speed Grades 11
- Running Qsys 14
- Generating the Example Design 15
- Simulating Altera Designs 17
- Time TLP Type Payload 18
- TLP Header 18
- Creating a Quartus II Project 19
- Compiling the Design 19
- Programming a Device 20
- Parameter Settings 21
- Parameter Value Description 22
- Device Capabilities 25
- Error Reporting 26
- Link Capabilities 27
- MSI and MSI-X Capabilities 28
- Power Management 29
- Clock Domains on page 6-5 33
- Application Layer 34
- RX Avalon-MM Master Signals 36
- Clock Signals 41
- Signal Direction Description 42
- Variant Logical Interfaces 49
- Hard IP Status Extension 50
- Field and Bit Map 58
- 0134678951 58
- Bit(s) Field Description 59
- Serial Data Signals 60
- PIPE Interface Signals 64
- Test Signals 69
- Registers 70
- Altera-Defined VSEC Registers 78
- CvP Registers 79
- Address Range Register 83
- Bit Name Access Description 84
- Bits Name Access Description 85
- PCI Express Mailbox Registers 86
- Avalon-MM Mailbox Registers 90
- Address Name Access 91
- Description 91
- Byte Offset 91
- Register Dir Description 91
- Sending a Write TLP 97
- Root Port TLP Data Registers 99
- UG-01097_avmm 100
- 2014.12.15 100
- Related Information 101
- Bits Register Description 102
- Reset and Clocks 105
- Hard IP for PCI Express 106
- Example Design 106
- Clock Domains 109
- Data Rate Frequency 110
- Clock Summary 112
- Interrupts for Endpoints 113
- MSI/MSI‑X Support 115
- MsiIntfc_o[81:0] 116
- MsiControl_o[15:0] 116
- MsixIntfc_o[15:0] 116
- IntxReq_i 116
- IntxAck_o 116
- Error Handling 117
- Physical Layer Errors 118
- Data Link Layer Errors 118
- Transaction Layer Errors 119
- Error Type Description 120
- Status Bit Conditions 123
- IP Core Architecture 125
- Hard IP for PCI Express 126
- Top-Level Interfaces 127
- Avalon-MM Interface 127
- Clocks and Reset 127
- Transceiver Reconfiguration 127
- Interrupts 127
- Data Link Layer 128
- Altera Corporation 129
- Send Feedback 129
- Physical Layer 130
- TX Packets 131
- Avalon‑MM Bridge TLPs 135
- Byte Enable Value Description 136
- PCI Express Avalon-MM Bridge 138
- RX Block 144
- Avalon-MM RX Master Block 144
- TX Block 145
- Interrupt Handler Block 145
- Enable PLL calibration 147
- Throughput Optimization 151
- Throughput of Posted Writes 153
- Design Implementation 155
- CONF_DONE 156
- Endpoint Reset 156
- Root Port Reset 156
- SDC Timing Constraints 157
- Optional Features 159
- ECRC on the RX Path 160
- ECRC on the TX Path 161
- Debugging 163
- Setting Up Simulation 166
- Use Third-Party PCIe Analyzer 168
- BIOS Enumeration Issues 168
- Address[31:2] 169
- Figure A-6: I/O Read Request 171
- 7 6 5 4 3 2 1 0 175
- Core Config 8 4 1 175
- Additional Information 177
- Date Version Changes Made 178
- How to Contact Altera 182
- Typographic Conventions 182
- Visual Cue Meaning 183
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