The MC68B50CP is an Asynchronous Communications Interface Adapter (ACIA) from Freescale Semiconductor (now NXP). It is designed to provide a flexible and cost-effective means of interfacing microprocessors to asynchronous serial data communications channels. This UART (Universal Asynchronous Receiver/Transmitter) is commonly used in embedded systems and communication devices.

Applications:

• Embedded Systems: Serial communication interface for various embedded applications.
• Computer Peripherals: Interfacing with serial devices such as modems and printers.
• Data Acquisition Systems: Serial data transmission from sensors and instruments.
• Industrial Control Systems: Communication with serial devices in industrial environments.
• Communication Devices: Implementing serial communication protocols in modems and other communication equipment.

Features:

• Asynchronous Serial Communication: Supports asynchronous data transmission.
• Programmable Data Format: Allows for flexible configuration of data word length, parity, and stop bits.
• Full-Duplex Operation: Supports simultaneous transmission and reception of data.
• Programmable Baud Rate Generator: Generates various baud rates for different communication speeds.
• Interrupt Capability: Generates interrupts to signal various events, such as data reception and transmission completion.

Benefits:

• Flexible Serial Communication: Adapts to various asynchronous serial communication protocols.
• Simplified Interface: Simplifies the interface between a microprocessor and a serial communication channel.
• Reduced Development Time: Provides a ready-to-use solution for serial communication needs.
• Improved System Performance: Enables efficient data transfer in embedded systems.
• Cost-Effective Solution: Provides a cost-effective means of implementing serial communication.

Additional Details:

The MC68B50CP requires an external clock signal to operate. Detailed specifications, including timing parameters, operating voltage, and pinout information, are available in the Freescale/NXP datasheet. The device supports various data formats, including 5, 6, 7, or 8 data bits, even, odd, or no parity, and 1 or 2 stop bits. Proper configuration of the control registers is crucial for setting up the desired communication parameters. It is often used with microcontrollers. Knowledge of UART protocols is essential for effective implementation.