The PCIe hard IP supports PCIe Gen2 and Gen1 end point and root port for up to x4 lane configuration.

The PCIe Gen2 x4 support is PCIe-compatible.

The PCIe endpoint support includes multifunction support for up to eight functions, as shown in the

following figure. The integrated multifunction support reduces the FPGA logic requirements by up to

20,000 LEs for PCIe designs that require multiple peripherals.

Figure 9: PCIe Multifunction for Cyclone V Devices

PCIe Link

External System

FPGA Device

Host CPU

Root

Complex

Local

Peripheral 1

Local

Peripheral 2

The Cyclone V PCIe hard IP operates independently from the core logic. This independent operation allows

the PCIe link to wake up and complete link training in less than 100 ms while the Cyclone V device completes

loading the programming file for the rest of the device.

In addition, the PCIe hard IP in the Cyclone V device provides improved end-to-end datapath protection

using ECC.

External Memory Interface

This section provides an overview of the external memory interface in Cyclone V devices.

Hard and Soft Memory Controllers

Cyclone V devices support up to two hard memory controllers for DDR3, DDR2, and LPDDR2 SDRAM

devices. Each controller supports 8 to 32 bit components of up to 4 gigabits (Gb) in density with two chip

selects and optional ECC. For the Cyclone V SoC devices, an additional hard memory controller in the HPS

supports DDR3, DDR2, and LPDDR2 SDRAM devices.

All Cyclone V devices support soft memory controllers for DDR3, DDR2, and LPDDR2 SDRAM devices

for maximum flexibility.

External Memory Performance

Table 20: External Memory Interface Performance in Cyclone V Devices

The maximum and minimum operating frequencies depend on the memory interface standards and the supported

delay-locked loop (DLL) frequency listed in the device datasheet.

Minimum Frequency (MHz)

Maximum Frequency (MHz)

Voltage

(V)

Interface

Soft Controller

Hard Controller

303

303

400

1.5

DDR3 SDRAM

303

303

400

1.35

Altera Corporation

Cyclone V Device Overview

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External Memory Interface

CV-51001

2013.12.26