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Microprocessor Week 2: CH2 Circuit and Operation
This document discusses the circuit and operation of the MCS51 microcontroller system. It describes the pin configuration including power, ground, crystal oscillator, reset and external access pins. It also covers the machine cycle, ports, input and output devices like LEDs and switches. Finally, it provides the homework assignment to draw a schematic of an MCS51 system circuit with a reset switch, 8 LED display and 4 push button switches identifying all component IDs, pin numbers, names and values.
Microprocessor Week 2: CH2 Circuit and Operation
- 1. Chapter 2: Circuitand System Operation
- 2.
- 3. • Pin configuration –Power – Ground – System Clock (18, 19 Crystal pin) • Operation Sample Add A, R1 • Machine Cycle is package of clock signal – Reset – External Access (/EA) • Port • Schematic • Machine Cycle
- 4. Pin 40: PowerSupply Handout Chapter 2
- 5. Pin 20: Ground HandoutChapter 2
- 6. Pin 18, 19:Crystal Handout Chapter 2
- 7. Pin 31: ExternalAccess Handout Chapter 2
- 8. Pin 9: Reset HandoutChapter 2
- 9. Port • 32 I/OLines • Bidirectional Property • Bit-Addressable port Property • Pulled-up Resister pin (Port 1, 2 and 3) • Open collector pin
- 10. Port 0 • HandoutChapter 2
- 11. Port 1 • HandoutChapter 2
- 12. Port 2 • HandoutChapter 2
- 13. Port 3 • HandoutChapter 2
- 14. Basic Output Device •LED https://en.wikipedia.org/wiki/Light-emitting_diode
- 15. Basic Input Device •Switch http://www.digibay.in/158-momentary-tactile-dip-push-button-switch
- 16.
- 17. Homework 1 • Drawschematic of MCS51 System circuit with following specification. – Reset Switch – Connect with 8 Display LEDs – Connect with 4 Push button switches Check list: Identify Component ID for every devices in the diagram (such as U1, SW1, SW2, LED1, LED2) Identify all used Pin Number Identify all used Pin Name Specify Component's value Specify Voltage of Power Supply Note: Submit Homework BEFORE the next class start.