The XR16V654DIV is a quad universal asynchronous receiver/transmitter (UART) with FIFOs manufactured by Exar Corporation. This device provides four independent UART channels, each capable of transmitting and receiving data asynchronously. It includes large FIFOs to minimize CPU intervention and improve data throughput.

Applications:

• Serial Communication: Connecting to serial devices such as modems, printers, and sensors.
• Embedded Systems: Interfacing with peripherals in embedded systems.
• Data Acquisition Systems: Collecting data from multiple serial sources.
• Industrial Control Systems: Communicating with industrial control devices.
• POS Systems: Connecting to serial peripherals in point-of-sale systems.

Features:

• Quad UART: Provides four independent UART channels.
• Large FIFOs: Reduces CPU overhead and improves data throughput.
• Automatic Hardware/Software Flow Control: Prevents data overflow.
• Programmable Baud Rate Generator: Supports a wide range of baud rates.
• Interrupt Generation: Notifies the CPU of important events.

Benefits:

• Increased Throughput: Large FIFOs improve data transfer rates.
• Reduced CPU Load: Automatic flow control minimizes CPU intervention.
• Versatile Communication: Supports a wide range of serial devices.
• Flexible Baud Rate Selection: Adaptable to various communication standards.

Additional Details:

The XR16V654DIV is typically available in a QFP or LQFP package. It supports various serial communication parameters, such as data bits, parity, and stop bits. The device requires a stable clock signal. The interrupt outputs can be configured to generate interrupts for various events. Consult the datasheet for detailed electrical characteristics, timing diagrams, and register descriptions. Proper configuration of the UART registers is essential for correct operation.