Chapter 1 : Introduction to the HC12 Microcontroller - EngSoc
Chapter 1 : Introduction to the HC12 Microcontroller - EngSoc
Chapter 1 : Introduction to the HC12 Microcontroller - EngSoc
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The 68<strong>HC12</strong> <strong>Microcontroller</strong><br />
CPU: Microprocessor versus <strong>Microcontroller</strong><br />
• Microprocessor: processor on a single integrated chip<br />
– Intel 80x86, Mo<strong>to</strong>rola 680x0 families...<br />
• Microprocessors evolved in two general directions:<br />
– Performance: processing power, data s<strong>to</strong>rage<br />
– Integration: amount of circuits on one chip<br />
• Microcomputer: computer using microprocessor as CPU<br />
– Combines microprocessor/peripheral chips -> computer system<br />
– i.e.: PC => Intel 80x86 + memory + timer + keyboard +<br />
modem (etc.) chips<br />
• <strong>Microcontroller</strong>: computer system on a chip<br />
– Microprocessor AND peripheral functions implemented on one chip<br />
– Built-in memory and interface circuits (I/O units)<br />
H. Huang Transparency No.1-3<br />
The 68<strong>HC12</strong> <strong>Microcontroller</strong><br />
MicroComputer versus MicroController System<br />
Micro<br />
Processor<br />
CPU<br />
Memory<br />
I/O Components<br />
Power<br />
Clock<br />
Micro<br />
Processor<br />
CPU<br />
Memory<br />
I/O Components<br />
Power<br />
Clock<br />
Extended<br />
Memory<br />
O<strong>the</strong>r I/O<br />
Peripheral<br />
H. Huang Transparency No.1-4
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