Altera Embedded Peripherals IP Instrukcja Użytkownika Strona 174

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Avalon-ST Multi-Channel Shared Memory FIFO
Core
17
2014.24.07
UG-01085
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Core Overview
The Avalon
®
Streaming (Avalon-ST) Multi-Channel Shared Memory FIFO core is a FIFO buffer with
Avalon-ST data interfaces. The core, which supports up to 16 channels, is a contiguous memory space
with dedicated segments of memory allocated for each channel. Data is delivered to the output interface in
the same order it was received on the input interface for a given channel.
The example below shows an example of how the core is used in a system. In this example, the core is
used to buffer data going into and coming from a four-port Triple Speed Ethernet MegaCore function. A
processor, if used, can request data for a particular channel to be delivered to the Triple Speed Ethernet
MegaCore function.
Figure 17-1: Multi-Channel Shared Memory FIFO in a System—An Example
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Rest of the
System
Altera
FPGA
M
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Port 0
Port 1
Port 2
Port 3
Channel 0
Channel 1
Channel 2
Channel 3
Processor/
Scheduler
Multi-port
Triple Speed Ethernet
Multi-Channel
Shared Memory FIFO
(Receive FIFO buffer)
From
Network
Dem
u
x
Performance and Resource Utilization
This section lists the resource utilization and performance data for various Altera device families. The
estimates are obtained by compiling the core using the Quartus
®
II software.
The table below shows the resource utilization and performance data for a Stratix II GX device
(EP2SGX130GF1508I4).
©
2014 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos are
trademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identified as
trademarks or service marks are the property of their respective holders as described at www.altera.com/common/legal.html. Altera warrants performance
of its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any
products and services at any time without notice. Altera assumes no responsibility or liability arising out of the application or use of any information,
product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised to obtain the latest version of device
specifications before relying on any published information and before placing orders for products or services.
ISO
9001:2008
Registered
www.altera.com
101 Innovation Drive, San Jose, CA 95134
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