M68HC05 Family — Understanding Small Microcontrollers
M68HC05 Family — Understanding Small Microcontrollers
M68HC05 Family — Understanding Small Microcontrollers
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Freescale Semiconductor, Inc...<br />
List of Figures<br />
Freescale Semiconductor, Inc.<br />
Figure Title Page<br />
30 Example Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138<br />
31 Flowchart and Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . .140<br />
32 Delay Routine Flowchart and Mnemonics . . . . . . . . . . . . .141<br />
33 Explanation of Assembler Listing . . . . . . . . . . . . . . . . . . . .145<br />
34 Syntax of an S1 Record . . . . . . . . . . . . . . . . . . . . . . . . . . .148<br />
35 S-Record File for Example Program . . . . . . . . . . . . . . . . .148<br />
36 Four Ways to Check a Switch . . . . . . . . . . . . . . . . . . . . . .153<br />
37 Flowchart of Main Paced Loop. . . . . . . . . . . . . . . . . . . . . .166<br />
38 Flowchart of RTI Service Routine. . . . . . . . . . . . . . . . . . . .167<br />
39 15-Stage Multifunction Timer Block Diagram . . . . . . . . . . .185<br />
40 PWM Waveforms with Various Duty Cycles. . . . . . . . . . . .187<br />
41 Portion of the MC68HC705J1A Timer . . . . . . . . . . . . . . . .188<br />
42 PWM With 16 Discrete Duty Cycle Outputs . . . . . . . . . . . .189<br />
43 Each TOF Interrupt Sliced into 16 Separate<br />
Time Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191<br />
44 Timer Interrupt Service Routine . . . . . . . . . . . . . . . . . . . . .192<br />
45 Real-Time Interrupt Routine Flowchart . . . . . . . . . . . . . . .193<br />
46 Timer Overflow Interrupt Flowchart . . . . . . . . . . . . . . . . . .194<br />
47 Motor Speed Controlled by a Variable Resistor . . . . . . . . .199<br />
48 Motor Speed Controlled by a Transistor. . . . . . . . . . . . . . .199<br />
49 Transistor Used as an Electronic Switch . . . . . . . . . . . . . .200<br />
50 PWM Waveforms with 50 and 80 Percent<br />
Duty Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201<br />
51 Power Section of the Motor Speed Control Circuit. . . . . . .203<br />
52 Microcontroller Section of the Motor<br />
Speed Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . .203<br />
53 Revised RTI Routine Flowchar. . . . . . . . . . . . . . . . . . . . . .205<br />
54 Flowchart for Main Program Loop . . . . . . . . . . . . . . . . . . .206<br />
55 Flowchart for MotorOn/Off Routine . . . . . . . . . . . . . . . . . .208<br />
56 Flowchart for Motor Speed-Up Routine . . . . . . . . . . . . . . .209<br />
57 Flowchart for Motor Speed-Down Routine . . . . . . . . . . . . .209<br />
<strong>M68HC05</strong> <strong>Family</strong> <strong>—</strong> <strong>Understanding</strong> <strong>Small</strong> <strong>Microcontrollers</strong> <strong>—</strong> Rev. 2.0<br />
14 List of Figures<br />
For More Information On This Product,<br />
Go to: www.freescale.com<br />
MOTOROLA
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