Chapter 1: Overview for Cyclone V Device Family
1–11
PCIe Gen1 and Gen2 Hard IP
PCIe Gen1 and Gen2 Hard IP
Cyclone V GX, GT, SX, and ST devices contain PCIe hard IP—consisting of the MAC,
data link, and transaction layers—that is designed for performance, ease-of-use, and
increased functionality. The PCIe hard IP supports PCIe Gen2 end point and root port
for x1 and x2 lanes configuration, and Gen1 end point and root port for up to x4 lane
configuration.
The PCIe endpoint support includes multifunction support for up to eight functions,
as shown in Figure 1–2. The integrated multifunction support reduces the FPGA logic
requirements by up to 20 K LEs for PCIe designs that require multiple peripherals.
Figure 1–2. PCIe Multifunction for Cyclone V Devices
External System
Cyclone V Device
Host CPU
PCIe Link
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.
FPGA GPIOs
Cyclone V devices offer highly configurable GPIOs. The following list describes the
many features of the GPIOs:
■
Programmable bus hold and weak pull-up.
■
LVDS output buffer with programmable differential output voltage (VOD) and
programmable pre-emphasis.
■
■
Dynamic on-chip parallel termination (RT OCT) for all I/O banks with OCT
calibration to limit the termination impedance variation to 15%.
On-chip dynamic termination that has the ability to swap between serial and
parallel termination, depending on whether there is read or write on a common
bus for signal integrity.
■
■
Unused voltage reference (VREF) pins that can be configured as user I/Os.
Easy timing closure support using the hard read FIFO in the input register path,
and delay-locked loop (DLL) delay chain with fine and coarse architecture.
February 2012 Altera Corporation
Cyclone V Device Handbook
Volume 1: Device Overview and Datasheet
ALTERA [ ALTERA CORPORATION ]
