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370L8 - Basic Processor Design Lecture 8 Processors General...

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Basic Processor Design Lecture 8
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Processors General purpose processors Good for most tasks, maybe overkill for some, too slow for others Programmable control (defined by machine instructions in memory) Special purpose processors Necessary for applications with non-standard requirements Very high performance, regular tasks (graphics) Very low power and/or cost (watch) Special purpose may or may not be programmable
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Special Purpose Controller This lecture: Design a non-programmable controller Implement it using the components from last lecture Next lecture: Design a general purpose processor Implement it using the components from last lecture
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First: A simple device Build a custom controller for a vending machine. We could use a general purpose processor, but we might save money with a custom controller. Take coins, give drinks
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Input and Output Inputs: 10 drink selectors coin trigger refund button Outputs: 10 drink release latches Coin refund latch 10 pressure sensors
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Operation of Machine Accepts quarters only Once we get the money, they can select a drink.
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