Lecture 2 - The 68HC11

Lecture 2 - The 68HC11 - ECE265 ECE 265 LECTURE 2 The...

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ECE 265 – LECTURE 2 The 68HC11 3/29/2011 1 ECE265
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© Joanne E. DeGroat, OSU Lecture Overview ± The M68HC11 microcontroller ± Basic Architecture ± General Physical and Logical Structure ± Things to focus on when learning an architecture ± The physical interface ± Programmers model – next lecture ± Material from Chapter 1 3/29/2011 2 ECE265
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© Joanne E. DeGroat, OSU Why microcontrollers 3/29/2011 ECE265 3 ± Two possible approaches in design of automating equipment or devices ± Approach 1 ± A single central processor/control unit – must have an input from all sensors and wires/connection to all actuators/control devices. ± Approach 2 ± Distributed processing – each processing unit controls the operation of only a specific subsystem or function. ± Microcontrollers have made approach 2 the desirable approach.
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© Joanne E. DeGroat, OSU Examples of Applications 3/29/2011 ECE265 4 ± The modern automobile ± More than 35 microcontrollers (recently I have heard this is now >40) ² The anti-lock brakes ² The engine control ² Speed control ² Wipers ² Sound System ² Others??? ± In the home ± Microwave ± Stove ± Washer and dryer ± Thermostat for heating/cooling system ± Others? ± Entertainment systems – could have several embedded processors ± Hi-def TVs
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© Joanne E. DeGroat, OSU Uses in industry 3/29/2011 ECE265 5 ± Microcontrollers are the basic building block for data acquisition and control applications. ± To implement a complete computer system, even embedded, you need a processor, some memory, input of data, and output of some fashion. ± In a microprocessor this entails multiple components
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Lecture 2 - The 68HC11 - ECE265 ECE 265 LECTURE 2 The...

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