MC68711E20CFNE3

Overview

• Category: Microcontroller
• Use: Control and processing of electronic devices
• Characteristics: High-performance, low-power consumption, integrated peripherals
• Package: 84-pin PLCC (Plastic Leaded Chip Carrier)
• Essence: Integrated microcontroller with on-chip memory and peripherals
• Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

• Architecture: 8-bit
• CPU Speed: 2 MHz
• Program Memory Size: 20 KB
• RAM Size: 512 bytes
• Number of I/O Pins: 38
• Operating Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC68711E20CFNE3 microcontroller has a total of 84 pins. The pin configuration is as follows:

1. VDD - Power supply voltage
2. VSS - Ground
3. XTAL - Crystal oscillator input
4. EXTAL - Crystal oscillator output
5. RESET - Reset input
6. IRQ - Interrupt request input
7. PA0-PA7 - General-purpose I/O pins
8. PB0-PB7 - General-purpose I/O pins
9. PC0-PC7 - General-purpose I/O pins
10. PD0-PD7 - General-purpose I/O pins
11. PE0-PE7 - General-purpose I/O pins
12. PF0-PF7 - General-purpose I/O pins
13. PG0-PG7 - General-purpose I/O pins
14. PH0-PH7 - General-purpose I/O pins
15. PJ0-PJ7 - General-purpose I/O pins
16. PK0-PK7 - General-purpose I/O pins
17. PL0-PL7 - General-purpose I/O pins
18. PM0-PM7 - General-purpose I/O pins
19. PN0-PN7 - General-purpose I/O pins
20. PP0-PP7 - General-purpose I/O pins
21. PQ0-PQ7 - General-purpose I/O pins
22. PR0-PR7 - General-purpose I/O pins
23. PS0-PS7 - General-purpose I/O pins
24. PT0-PT7 - General-purpose I/O pins
25. PU0-PU7 - General-purpose I/O pins
26. PV0-PV7 - General-purpose I/O pins
27. PW0-PW7 - General-purpose I/O pins
28. PX0-PX7 - General-purpose I/O pins
29. PY0-PY7 - General-purpose I/O pins
30. PZ0-PZ7 - General-purpose I/O pins
31. PALE - Address latch enable
32. PSEN - Program store enable
33. RDY - Ready input
34. E - Chip enable
35. RW - Read/Write control
36. RS - Register select
37. DB0-DB7 - Data bus
38. VBAT - Backup battery voltage

Functional Features

• Integrated CPU, memory, and peripherals on a single chip
• High-performance 8-bit architecture for efficient processing
• Low-power consumption for extended battery life
• On-chip memory for program storage and data handling
• Integrated peripherals such as timers, UART, and I/O ports
• Flexible I/O configuration for interfacing with external devices
• Interrupt capability for real-time event handling
• Built-in clock oscillator for accurate timing

Advantages and Disadvantages

Advantages

• Compact and integrated design reduces component count and board space
• Low-power consumption extends battery life in portable applications
• High-performance architecture enables efficient processing
• Integrated peripherals simplify system design and reduce external components
• Flexible I/O configuration allows for versatile interfacing options

Disadvantages

• Limited program memory size may restrict the complexity of applications
• Relatively low CPU speed compared to modern microcontrollers
• Availability and support may vary due to the age of the product

Working Principles

The MC68711E20CFNE3 microcontroller operates based on an 8-bit architecture. It executes instructions stored in its program memory, processes data using its integrated CPU, and interacts with external devices through its I/O pins. The microcontroller's clock oscillator provides timing signals for synchronization.

Upon power-up or reset, the microcontroller initializes its internal registers and peripherals. It then enters a loop where it fetches instructions from the program memory, decodes them, and executes the corresponding operations. The microcontroller can respond to interrupts from external sources, allowing it to handle real-time events efficiently.

Application Field Plans

The MC68711E20CFNE3 microcontroller finds applications in various fields, including