The S80C31BH is an 8-bit microcontroller manufactured by Rochester Electronics. As a part of the MCS-51 family, it’s a ROM-less version which necessitates external memory for program storage. Rochester Electronics specializes in manufacturing and distributing end-of-life and mature semiconductors, so this part is likely a recreation of the original Intel design. The 'BH' suffix may denote a specific package type or temperature range specification.

Applications

• Industrial Control Systems: Controlling machinery, automating processes, and monitoring sensors in industrial environments.
• Embedded Systems: Used in a wide variety of embedded systems, including consumer electronics, automotive applications, and industrial equipment.
• Instrumentation: Implemented in test equipment, measurement devices, and laboratory instruments.
• Robotics: Controlling motors, reading sensors, and performing calculations in robotic systems.
• Communication Equipment: Found in communication devices, such as modems and network interfaces.

Features

• 8-bit Architecture: Efficiently processes data for a wide range of control applications.
• 128 Bytes of On-Chip RAM: Provides temporary storage for data and variables during program execution.
• Four 8-bit I/O Ports: Offers versatile input and output capabilities for interfacing with external peripherals and devices.
• Two 16-bit Timer/Counters: Facilitates timing, counting, and pulse generation for various applications.
• Full-Duplex UART: Enables asynchronous serial communication for data exchange with other devices.

Benefits

• Reliable Performance: Proven architecture delivers consistent and dependable performance.
• Wide Availability: Rochester Electronics ensures ongoing availability of this microcontroller, even after the original manufacturer discontinues production.
• Easy to Program: Well-established instruction set and readily available development tools make programming relatively straightforward.
• Versatile I/O Capabilities: Four 8-bit I/O ports offer flexibility in interfacing with a variety of external devices.
• Cost-Effective Solution: Provides a cost-effective solution for many embedded control applications.

Additional Details

The S80C31BH from Rochester Electronics requires external memory (ROM or EPROM) for program storage. It supports a variety of interrupt sources and features a built-in oscillator. The device is typically packaged in a 40-pin DIP (Dual In-line Package) or a surface-mount package. It operates on a 5V power supply. While it is a mature product, it continues to be supported with development tools and resources, making it a viable option for legacy designs or applications where a simple, reliable microcontroller is needed. Because it is manufactured by Rochester Electronics, it provides a reliable source of this part even when other manufacturers no longer offer it. Specifications should be verified with the Rochester Electronics datasheet.