The MC705C9ACFNER is an 8-bit microcontroller manufactured by Motorola/Freescale (now NXP). It is a member of the M6805 family of microcontrollers and designed for a wide range of embedded control applications. It is characterized by its on-chip peripherals and memory configuration optimized for cost-effectiveness and versatility. The device is suited for applications needing a compact and integrated solution.

Applications

• Consumer Electronics: Remote controls, toys, and simple appliances.
• Automotive: Dashboard controls, and simple automotive electronics.
• Industrial Control: Process control and monitoring systems, and motor control applications.
• Medical Devices: Simple medical instrumentation and monitoring.
• Security Systems: Alarm systems and access control systems.

Features

• 8-bit CPU (M6805 core): Provides efficient processing capabilities for control-oriented applications.
• 2 KB of ROM: For storing program code.
• 112 Bytes of RAM: For data storage and manipulation.
• 16 Bidirectional I/O Pins: Allowing for flexible connection to external devices and sensors.
• 8-bit Timer with Prescaler: Allows for precise timing and control of external events.
• On-Chip Oscillator: Simplifies the design by eliminating the need for an external oscillator.

Benefits

• Cost-effective: Ideal for high-volume applications.
• Small size: The compact package allows for use in space-constrained applications.
• Integrated Peripherals: Reduces external component count, simplifying the design.
• Easy to Program: Utilizes a straightforward instruction set, making it accessible for development.
• Versatile: Suitable for a wide range of embedded applications.

Additional Details

The MC705C9ACFNER operates at a clock frequency up to 2.1 MHz. It offers power-saving modes to minimize power consumption in battery-powered applications. The on-chip timer with prescaler enhances the control and timing capabilities. The ROM is pre-programmed and typically requires a custom mask programmed by the manufacturer. Its operating voltage is typically 5V. The combination of internal memory, I/O ports, and timer makes it a suitable choice for various embedded control scenarios. The low power consumption and integrated features make it suitable for low-power applications where external components must be minimized. The architecture is designed to be robust and reliable for use in various environments.