AIMS -INPUT/OUTPUT MODULE FUNCTIONAL DESCRIPTION
Two of the ARINC 429 transmit channels are sent out through relays. The other input into each relay is from the other AIMS cabinet or from another IOM in the same AIMS cabinet. The AIMS functions in the CPMs supply the relay control. The functions that supply the ARINC 429 source select logic are:
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Flight management computing function
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Central maintenance computing function
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Data conversion gateway function
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Data communication management function.
Analog and Discrete/ARINC 629 CCA
The analog and discrete/ARINC 629 CCA supplies the interface between the IOC/BIPM and the analog inputs and outputs, the discrete inputs and outputs and one ARINC 629 channel.
The analog and discrete interface supplies 76 discrete inputs. Sixteen of the inputs are wrap around discretes. The total number of discrete inputs available for other inputs is 60. The analog and discrete interface converts the discrete inputs to a digital format. The IOC/BIPM CCA transmits the digital data on the backplane data bus to the CPMs.
The analog and discrete interface supplies sixteen discrete outputs. Wrap around discrete inputs monitor the discrete outputs. The analog and discrete interface coverts the digital data from the IOC/BIPM CCA and sets the analog discrete outputs.
The analog and discrete interface supplies 11 analog inputs and converts the analog inputs to a digital format. The IOC/BIPM CCA transmits the digital data on the backplane data bus to the CPMs.
The analog and discrete interface supplies two analog outputs. It converts the digital data from the IOC/BIPM CCA and supplies the analog discrete outputs.
IOM Slot Position
The IOMs all have the same hardware and software. The IOM gets its slot identity from a ground that the cabinet supplies.
Training Information Point
At power up, the IOMs go through an initialization phase where they read their slot identity and configure themselves to the slot they are in. If you remove and install an IOM, when you reapply power to the cabinet, the IOM will go through the initialization phase.
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AIMS -CORE PROCESSOR MODULE/BASIC FUNCTIONAL DESCRIPTION
General
These are the four types of core processor modules:
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CPM/Basic
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CPM/Graphics generator (CPM/GG)
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CPM/Airplane condition monitoring function (CPM/ACMF)
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CPM/Communication (CPM/Comm).
Each CPM has the same basic hardware and some unique hardware. Each of the CPMs have the same hardware as the CPM/Basic and then some unique hardware to make it different.
The CPM/Basic does the calculations for these systems:
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Flight management computing system
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Thrust management computing system.
CPM Hardware
The core processor modules have:
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lockstep processors
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Memory devices
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Application specific integrated circuits
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Support hardware.
All of this is mounted on circuit card assemblies in the CPM.
Circuit Card Assemblies
The CPMs have internal slots for up to 7 circuit card assemblies (CCAs). The CPMs all have five basic CCAs. The remaining internal slots for CCAs contain unique CCAs to make each CPM different.
These are the five basic CCAs:
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Power supply CCA
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Backplane interface/power monitor (BIPM) CCA
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Processor CCA
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Instruction Memory CCA
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Data memory CCA.
The sixth and seventh slots have a unique CCA in some CPMs. This makes each of the four types of CPMs different.
The CPM/Basic only has the five basic CCAs. The CPM/Basic is described here.
Power Supply CCA
The power supply CCA receives 28v dc from five sources on the power backplane. The power supply CCA supplies power for these functions:
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The other CCAs
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5v dc transceiver power backplane
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2v dc termination power backplane.
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Backplane Interface/Power Monitor CCA
The backplane interface/power monitor (BIPM) CCA has two backplane interface/power monitors (BIPM) interface circuits and four transceivers.
The CPM uses the BIPMs for communication to the other CPMs and to the IOMs on the backplane data bus. The BIPM CCA also monitors the CPM power.
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