Figure 1. The PCI 6156 in a Video Capture Application
If the data is not available, this long cycle starts again. Even at the point when the data becomes available, an additional
delay in getting the data still applies because the requestor has to go through the process of gaining access to the bus and
other arbitrating issues before gaining access to the data.
The PCI 6156 device, however, prohibits such delays from decreasing system performance. The requestor device on the
primary bus, rather than being retried, is allowed to hold onto the bus and wait until the data is ready on the secondary
side. When the data on the secondary side is ready, the data is delivered immediately to the requestor device, waiting on
the primary side. Because data is immediately presented to the requestor at the earliest possible time, the “no retry
penalty” flow service offered by the PCI 6156 results in reduced transaction latency and increased throughput
performance. The PLX FastLane PCI 6156 offers unparalleled PCI load support and advanced performance features,
enabling cost sensitive, space limited applications to continue to provide high quality, high performance data transmission
capability.
PLX Technology, Inc.
870 Maude Ave.
Sunnyvale, CA 94085 USA
Tel: 1-800-759-3735
Tel: 1-408-774-9060
Fax: 1-408-774-2169
Email: info@plxtech.com
Web Site: www.plxtech.com
Product Ordering Information
Part Number
PCI 6156-DA33PC
Description
PCI 6156 PCI--to-PCI Bridge Chip (PQFP)
Please visit the PLX Web site at
http://www.plxtech.com
or contact PLX sales at 408-774-9060 for more information.
© 2004 PLX Technology, Inc. All rights reserved. PLX and the PLX logo are registered trademarks of PLX Technology, Inc. All other product names that appear in this
material are for identification purposes only and are acknowledged to be trademarks or registered trademarks of their respective companies. Information supplied by PLX is
believed to be accurate and reliable, but PLX Technology, Inc. assumes no responsibility for any errors that may appear in this material. PLX Technology, Inc. reserves the
right, without notice, to make changes in product design or specification.
6156-SIL-PB-P1-1.0
03/04 200
PLX [ PLX TECHNOLOGY ]
