AMX DESIGN XPRESS V 1.5 - PROGRAMMER GUIDE User's Guide Page 11

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Chapter 1: Datasheet 1–3
Features
December 2013 Altera Corporation Cyclone V Hard IP for PCI Express
User Guide
f The purpose of the Cyclone V Hard IP for PCI Express User Guide is to explain how to
use the Cyclone V Hard IP for PCI Express and not to explain the PCI Express
protocol. Although there is inevitable overlap between these two purposes, this
document should be used in conjunction with an understanding of the following PCI
Express specifications: PHY Interface for the PCI Express Architecture PCI Express 2.0 and
PCI Express Base Specification 2.1.
Transaction Layer Packet Types (TLP) (3)
Memory Read Request
Memory Read Request-Locked
Memory Write Request
I/O Read Request
I/O Write Request
Configuration Read Request
(Root Port)
Configuration Write Request
(Root Port)
Message Request
Message Request with Data
Payload
Completion without Data
Completion with data
Completion for Locked Read
without Data
Memory Read Request
Memory Write Request
Configuration Read Request
(Root Port)
Configuration Write Request
(Root Port)
Message Request
Message Request with Data
Payload
Completion without Data
Completion with Data
Memory Read Request (single
dword)
Memory Write Request (single
dword)
Maximum payload size 128–512 bytes 128–256 bytes
Number of tags supported for non-posted
requests
32 or 64 8
62.5 MHz clock Supported Supported
Multi-function
Supports up to 8 functions Supports single function only
Polarity inversion of PIPE interface signals Supported Supported
ECRC forwarding on RX and TX Supported Not supported
Expansion ROM Supported Not supported
Number of MSI requests 16 1, 2, 4, 8, or 16
MSI-X Supported Supported
Multiple MSI, MSI-X, and INTx Not Supported Supported
Legacy interrupts Supported Supported
Notes to Table 1–2:
(1) Not recommended for new designs.
(2) ×2 is supported by down training from ×4 or ×8 lanes.
(3) Refer to Appendix A, Transaction Layer Packet (TLP) Header Formats for the layout of TLP headers.
Table 1–1. Differences in Features Available Using the Avalon-MM and Avalon-ST Interfaces (Part 2 of 2)
Feature Avalon-ST Interface Avalon-MM Interface
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