InfiniBand Bus Description


Posted on Feb 6, 2014

Higher bandwidth connections are made by grouping 4 or 12 pairs together, for up to 3 GB/s full-duplex connections. InfiniBand is designed to be used over a Backplane, Copper wire or Fiber. The impedance for the PWB interface or cable interface is 100W. All inter-connections are Hot-Swappable on InfiniBand. The specification defines a data rate of 250MBytes/sec for both


InfiniBand Bus Description
Click here to download the full size of the above Circuit.

electrical and optical signaling. That`s a 2. 5GHz signaling speed using 8B/10B [10 bits = 1 byte] Each IBA Packet [InfiniBand Architecture] begins with a Start-of-Frame [SOF], and ends with an End-of-Frame [EOF]. The Header field is made up of a Routing Header and a Transport Header. The Packet Payload follows the Header field. Two different Cyclic Redundancy Code [CRC] fields follow the Payload; ICRC [Invariant CRC] and VCRC [Variant CRC]. The Invariant CRC field covers the packets that do not change from source to destination, while the Variant CRC filed covers packets from link to link. Fill frames are used between packets. The maximum allowable Deterministic Jitter [JD] from the driver is 0. 17 UI [without pre-emphasis]. The Total Jitter [JT] allowed from the driver is 0. 35 UI. They reside with in a metal case to provide EMI shielding. The thickness of the PWB isn`t really defined, as long as it resides with in the EMI defined case.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Electrical Appliance Time Controller
Audio Mixer with 2N3819
Tachless-motor-speed-controller
Triac Dimmer Circuit
Analogue to Digital Converter
Electrical Systems and Circuits
500 metre radio data link
Bandwidth reduction of DXTV video
wi fi interfacing with lpc2148 arm7 primer
Car Alarm Simulator
Battery voltage indication circuit



Top