Bridge modules expand CompactPCI backplanes

Novel cPCI backplane bridge modules permit 33 and 66MHz systems to be expanded across two or even three backplanes, with automatic detection of 32/64bit systems, and support for 3.3 and 5V input.

Novel cPCI backplane bridge modules permit 33 and 66MHz systems to be expanded across two or even three backplanes, with automatic detection of 32/64bit systems, and support for 3.3 and 5V input.

The eight-layer bridge modules are available with the wide range of Elma 3U and 6U CompactPCI backplanes, enabling both two-backplane configurations (7 + 3-7 slot), and up to 21 slots with three backplanes.

Special application support is available for three-backplane 66MHz versions.

For maximum flexibility, system slots on the right or left are supported.

All slots are fully accessible from the front.

JTAG boundary scan connections are provided, and on-board regulation means that no 3.3V connection is required.

The left and right system slot versions are keyed to avoid incorrect fitting, and suit both 3 and 6U formats.

Because the modules plug behind the backplane, all backplane slots are fully accessible from the front, minimising system size.

The 64bit cPCI bridge module automatically adjusts for any combination of 3.3 and 5V input either side of the bridge, and the optional 66MHz version can include a simple SMD configuration switch to link 66MHz primary backplanes to 33 or 66MHz backplanes.

Elma currently offers up to five-slot 66MHz cPCI backplanes, enabling the support of 66MHz bridged solutions on request.

Seven clock signals and arbitration for seven secondary devices is built-in to the 95.1 x 79mm modules, which are available as part of a configured backplane subsystem.

By using multiple capacitor types distributed across the backplane, together with Elma's proven backplane routing expertise, crosstalk has been virtually eliminated, and extremely low RF radiation has been achieved in these 0-70C-rated active modules.

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