Description
The Trusted CI has part number T8151B. T8151 is an earlier part number for the same module. Later modules have 100BaseT Ethernet but not 10Base2, as below, have a faster processor, a single printed circuit board (PCB) and also keep a backup system event log. The module has a Motorola Power PC Processor. Bootstrap software is stored on Erasable Programmable Read Only Memory (EPROM). Operational firmware is stored in flash memory and may be upgraded via the Front Panel Port. The Trusted Operating System is used on both the TMR Processor and CI. The real time kernel is a high speed, high functionality kernel made for fault tolerant distributed systems. The kernel provides basic services (such as memory management) and interference free software environments. A module watchdog monitors processor operation and the power supply unit (PSU) output voltages. The module is supplied with a dual redundant +24 Vdc power feed from the chassis backplane. An on-board power supply unit provides voltage conversion, supply conditioning and protection. The Trusted CI communicates with the Trusted TMR Processor via the triplicated InterModule Bus. When polled by the Trusted TMR Processor, the module’s bus interface votes the data 2 out of 3 (2oo3) from the Inter-Module Bus and transmits back its reply via all three Inter-Module Bus channels. The remainder of the Communications Interface is simple
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