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Figure 4-4: Legacy Interrupt Deassertion
clk
IntxReq_i
IntAck_o
Physical Layer Interface Signals
Altera provides an integrated solution with the Transaction, Data Link and Physical Layers. The IP
Parameter Editor generates a SERDES variation file, <variation>_serdes.v or .vhd , in addition to the Hard
IP variation file, <variation>.v or .vhd. The SERDES entity is included in the library files for PCI Express.
Transceiver Reconfiguration
Dynamic reconfiguration compensates for variations due to process, voltage and temperature (PVT).
Among the analog settings that you can reconfigure are V
OD
, pre-emphasis, and equalization.
You can use the Altera Transceiver Reconfiguration Controller to dynamically reconfigure analog
settings. For Gen2 operation, you must turn on Enable duty cycle calibration in the Transceiver Reconfi‐
guration Controller GUI. Arria V devices require duty cycle calibration (DCD) for data rates greater than
4.9152 Gbps. For more information about instantiating the Altera Transceiver Reconfiguration Controller
IP core refer to Hard IP Reconfiguration .
Table 4-8: Transceiver Control Signals
In this table, <n> is the number of interfaces required.
Signal Name Direction Description
reconfig_from_
xcvr[(<n>46)-1:0]
Output Reconfiguration signals to the Transceiver Reconfiguration
Controller.
reconfig_to_xcvr[(<n>
70)-1:0]
Input Reconfiguration signals from the Transceiver Reconfiguration
Controller.
busy_xcvr_reconfig
Input When asserted, indicates that the a reconfiguration operation is
in progress.
reconfig_clk_locked
Output When asserted, indicates that the PLL that provides the fixed
clock required for transceiver initialization is locked. The
Application Layer should be held in reset until reconfig_clk_
locked is asserted.
The following table shows the number of logical reconfiguration and physical interfaces required for
various configurations. The Quartus II Fitter merges logical interfaces to minimize the number of physical
interfaces configured in the hardware. Typically, one logical interface is required for each channel and one
for each PLL.
UG-01105_avmm
2014.12.15
Physical Layer Interface Signals
4-15
Interfaces and Signal Descriptions
Altera Corporation
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- User Guide 1
- Datasheet 2
- Features 3
- Release Information 6
- Device Family Support 6
- Altera FPGA 7
- IP Core Verification 9
- Debug Features 9
- Recommended Speed Grades 10
- Hard IP for PCI Express 12
- Running Qsys 13
- Generating the Example Design 14
- Programming a Device 18
- Quartus II Programmer 19
- Parameter Settings 20
- Parameter Value Description 21
- Device Capabilities 23
- Error Reporting 24
- Link Capabilities 25
- MSI and MSI-X Capabilities 25
- Power Management 27
- Subscribe 31
- RX Avalon-MM Master Signals 33
- Clock Signals 38
- Reset Signals 38
- Signal Direction Description 39
- Hard IP Status 40
- IntxReq_i 44
- IntAck_o 44
- Hard IP Status Extension 46
- Field and Bit Map 54
- 0134678951 54
- Serial Interface Signals 55
- 9 Ch 18 Ch 56
- Variant Data CMU Clock 57
- PIPE Interface Signals 58
- Test Signals 62
- Registers 63
- Altera-Defined VSEC Registers 71
- CvP Registers 72
- Address Range Register 76
- Bit Name Access Description 77
- Bits Name Access Description 78
- PCI Express Mailbox Registers 79
- Avalon-MM Mailbox Registers 83
- Address Name Access 84
- Description 84
- Byte Offset 84
- Register Dir Description 84
- Sending a Write TLP 90
- Root Port TLP Data Registers 92
- Bits Register Description 95
- Reset and Clocks 98
- Example Design 99
- UG-01105_avmm 100
- 2014.12.15 100
- Clock Domains 102
- Data Rate Frequency 103
- Related Information 103
- Clock Summary 104
- Interrupts for Endpoints 105
- MSI/MSI‑X Support 107
- Qsys System 108
- Error Handling 109
- Physical Layer Errors 110
- Data Link Layer Errors 110
- Transaction Layer Errors 111
- Error Type Description 112
- Status Bit Conditions 115
- IP Core Architecture 117
- Hard IP for PCI Express 118
- Clocks and Reset 119
- Transceiver Reconfiguration 119
- Interrupts 119
- Data Link Layer 120
- Altera Corporation 121
- Send Feedback 121
- Physical Layer 122
- TX Packets 123
- Avalon‑MM Bridge TLPs 127
- Byte Enable Value Description 128
- PCI Express Avalon-MM Bridge 130
- RX Block 136
- Avalon-MM RX Master Block 136
- TX Block 137
- Interrupt Handler Block 137
- Design Implementation 139
- Making Pin Assignments 140
- Optional Features 141
- ECRC on the RX Path 142
- ECRC on the TX Path 143
- Enable PLL calibration 145
- Debugging 148
- Setting Up Simulation 149
- Use Third-Party PCIe Analyzer 150
- BIOS Enumeration Issues 151
- Address[31:2] 152
- Figure A-6: I/O Read Request 154
- 7 6 5 4 3 2 1 0 158
- Core Config 8 4 1 158
- Additional Information 160
- Date Version Changes Made 161
- How to Contact Altera 163
- Typographic Conventions 164
- Visual Cue Meaning 165
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