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Chapter 1 mA-1302/mA-1305 Overview
Principles of Operation
Chassis Backplane
The Chassis Backplane is largely a passive interconnect that provides power, timing,
trigger and local bus inter-connectivity for Chassis and shelf modules. The Chassis
Backplane provides Intelligent Platform Management Bus (IPMB) connectivity to all
instrument slots and has an Intelligent Platform Management Controller (IPMC) to provide
backplane connectivity information to the Chassis Shelf Manager. Additionally, the
Chassis Backplane provides two distinct starfabrics originating from the System Module
and driven to all instrument slots.
The Chassis Backplane expands upon the AXIe-1.0 Base Architecture specification by
providing three additional full fabric channels from the system slot fabric hub, providing a
total of sixteen transceiver lanes to each instrument slot. The System Module utilizes these
transceiver lanes for PCIe switch fabric connectivity. The additional three fabric channels
provides higher system bandwidths and/or protocol options beyond the base specification.
The Chassis Backplane also provides connectivity for the full 62-signal pair local bus
channels. The Chassis Backplane's operational functions include housing several signal
buffers and identification memory devices.
Page 1-4
mA-1302/mA-1305 AXIe Chassis Operation Manual
Rev. D0
April 2020
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