Microdot A Four Bit Microcontroller Designed For Distributed Low End Computing In Satellites(1st Edition)

Authors:

Anthony R Woodcock

Type:Hardcover/ PaperBack / Loose Leaf
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Book details

ISBN: 1249401100, 978-1249401100

Book publisher: Biblioscholar

Book Price $0 : As Satellites Become More Complex, The On-board Processing Capabilities Must Keep Up. Many Satellites Are An Integrated Collection Of Sensors And Actuators With Many Requiring Dedicated Real-time Control To Operate Correctly. For Single Processor Systems, Adding More Sensors Requires An Increase In Computing Power And Speed To Provide The Multi-tasking Capability Needed To Service Each Sensor. Faster Processors Are More Costly And Consume More Power, Which Can Tax A Satellite's Power Resources And May Lead To Shorter Satellite Lifetimes. Commercial-Off-The-Shelf (COTS) Electronic Components Are Usually Not Acceptable For Satellite Design Because They Have Not Been Hardened Against The Radiation Environment Of Space. An Alternative Design Approach Is To Use A Distributed Network Of Small And Low Power Microcontrollers Designed For Space To Handle The Computing Requirements Of Each Individual Sensor And Actuator. The Design Of Microdot, A Four-bit Microcontroller For Distributed Low-end Computing, Is Presented. The Design Is Based On Previous Research Completed At The Space Electronics Branch, Air Force Research Laboratory (AFRL/VSSE) At Kirtland AFB, NM, And The Air Force Institute Of Technology At Wright- Patterson AFB, OH. The Microdot Has 29 Instructions And A 1K X 4 Instruction Memory. The Distributed Computing Architecture Is Based On The Philips Semiconductor I2C Serial Bus Protocol. A Prototype Was Implemented And Tested Using An Altera Field Programmable Gate Array (FPGA). The Prototype Was Operable Up To 9.1 MHz. The Design Was Also Targeted For Fabrication Using A Radiation-hardened-by-design Gate-array Library From Mission Research Corporation. The Gate-array Library Is Designed For The TSMC 0.35 Micrometer CMOS Process.