TI’s lockstep implementation is a 1oo1D design which is inherently less sensitive to common cause failure than 1oo2 or 2oo2 lockstep architectures. In addition TI has applied measures including temporal diversity and physical/layout diversity to further mitigate common cause failure concerns. TI has been producing products with similar lockstep architectures for many years and has yet to see a confirmed common cause CPU failure. Details of the design for mitigation of common cause failure in the lockstep diagnostic are publicly available Section 18.104.22.168 in the RM46 safety manual, which can be downloaded from http://www.ti.com/hercules (lit#SPNU551)
NASA's Orion Flight Software Production Systems Manager Darrel G. Raines joins Planet Analog Editor Steve Taranovich and Embedded.com Editor Max Maxfield to talk about embedded flight software used in Orion Spacecraft, part of NASA's Mars mission. Live radio show and live chat. Get your questions ready.
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