PCI6156 Datasheet, PDF (1/2 Pages) PLX Technology – Synchronous, 32-bit, 33MHz PCI-to-PCI Bridge for Video Capture Applications

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PCI 6156
Connectivity
ƒ Support for up to ten PCI Masters
ƒ Synchronous Primary &
Secondary PCI Bus Operation
ƒ PCI revision 2.2 with VPD
support
ƒ Provides programmable
arbitration support for up to ten
bus masters on the secondary
interface
ƒ Five buffered secondary PCI
clock outputs
o Supports 32-bit I/O Address
range
o Supports 64-bit Memory
Address range
o ISA-Aware mode for legacy
support in the first 64 KB of
I/O Address range
o VGA addressing and VGA
palette snooping support
ƒ Supports 3.3V PCI with 5V
tolerant I/O
ƒ Industry-standard 206-pin Plastic
Quad Flat Pack (PQFP) package
Synchronous, 32-bit, 33MHz PCI-to-PCI Bridge for Video Capture Applications
Industry’s First and Only PCI-to-PCI Bridge that Supports up
to Ten PCI Devices
The PLX FastLane™ PCI 6156 PCI-to-PCI
Bridge is a 32-bit, 33MHz device capable of
supporting up to ten PCI devices. Targeted at the
video capture and surveillance add-in card
markets, the PCI 6156 brings unprecedented bridging, through support of the
greatest number of PCI loads, as well as cost savings and increased
performance, to OEM systems.
Total System Cost Savings
The PLX FastLane PCI 6156 reduces total system cost for OEM developers
because rather than needing two cards to support a large number of camera
feeds, only one card is needed. As an example, the typical PCI-to-PCI Bridge
supports four PCI loads. In order to support 8-10 cameras, at least two or
perhaps three, different cards need to be installed in order to address the load
requirements and stay within the PCI load tolerance. But with the FastLane
PCI 6156, only one card is required to support all ten cameras, thus reducing
the overall system add-in card cost by 50%-66%!
The additional cameras on a single card also provides for more system
efficiency. Since the PCI 6156 allows more cameras to be supported on a
single card, more cameras can be accommodated per system. Most surveillance
systems have six slots per system. Each slot can now host, rather than four
cameras, up to ten cameras each. This provides an increased system efficiency
of 40%. This efficiency equates to an overall reduced system cost, as only one,
rather than multiple, surveillance systems are required to support up to 60
cameras.
Performance
The PLX FastLane PCI 6156 offers increased PCI
throughput performance. The PCI 6156 optimizes
performance with “no retry penalty” flow and
uninterrupted zero wait state bursts (for up to
1KB packets). The no retry penalty flow
feature prohibits a requesting device from
being held off from the bus, and “re-tried”
while the PCI Bridge pursues the request
on the secondary bus. A typical retry
policy results in increased overall latency,
as the requesting device will have to continue to retry
the bus, wait until it gains access to the bus, and then subsequently get the data,
once the data is available.