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Small Spacecraft Missions – How About Flying a CubeSat? - page 27 / 44

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Slide 27

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Construction

Command & Data Handling (C&DH)

Processors used: 8051, AVR, PIC, MP430, x86/Pentium, etc. (all COTS parts, industrial temp range –40C to +85C

Programming & debugging environment is perhaps more important than the choice of processor, though some choices will be based on uC’s peripherals

The more data you need to process, the better the architecture needs to be

C&DH may be done on a dedicated processor or on the SC’s sole processor

Watchdogs

Internal (sw) watchdog – simple and window-style

External (hw) watchdog – independent operation

DTMF decoder system reset via GS (e.g. QuakeSat)

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