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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) The anti-lock brakes The engine control Speed control Wipers Sound System 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 on a printed circuit board such as a PC motherboard.
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