The XR16L651CM is a single-channel Universal Asynchronous Receiver/Transmitter (UART) with a 64-byte FIFO, manufactured by Exar Corporation. It's designed to bridge the serial communication gap between a host system and peripheral devices. It is commonly used in embedded systems, data acquisition systems, and other applications that require reliable serial communication.

Applications

• Serial ports in embedded systems
• Point-of-sale (POS) terminals
• Industrial control systems
• Data acquisition systems
• Modems and other communication devices

Features

• Single UART channel
• 64-byte transmit and receive FIFOs
• Data rates up to 5 Mbps
• Automatic hardware/software flow control
• Programmable transmit and receive FIFO trigger levels
• Internal loop-back diagnostics

Benefits

• Efficient data handling: Large FIFOs reduce CPU overhead by allowing the UART to handle more data without interrupting the host processor.
• High-speed communication: Supports data rates up to 5 Mbps, enabling fast and reliable data transfer.
• Flexible flow control: Automatic hardware/software flow control prevents data loss by managing the data flow between the UART and the peripheral device.
• Easy integration: Programmable FIFO trigger levels and internal loop-back diagnostics simplify system integration and debugging.
• Versatile application: Suitable for a wide range of applications due to its flexible features and high performance.

Additional Details

The XR16L651CM supports various serial communication parameters, including data bits, stop bits, and parity. It also includes interrupt capabilities for efficient data handling. The device is typically packaged in a QFP package, which allows for easy mounting on a printed circuit board. It operates on a supply voltage of 3.3V or 5V. The XR16L651CM integrates a fractional baud rate generator that provides a wide range of baud rates. This feature is very important for applications that do not have standard crystal frequencies.