The ST16C2550IQ48 is a dual universal asynchronous receiver/transmitter (UART) with a parallel interface, manufactured by Exar Corporation. It provides flexible solutions for serial communication needs in a variety of applications.

Applications:

• Industrial PCs and embedded systems requiring serial communication.
• Multi-port serial cards.
• Data acquisition systems.
• Point-of-sale (POS) systems.
• Networking devices.

Features:

• Dual UART channels. Each channel operates independently.
• Parallel interface for easy connection to host processors.
• Data rates up to 3 Mbps per channel.
• Programmable baud rate generator.
• 16-byte transmit and receive FIFOs to reduce CPU overhead.
• Automatic hardware and software flow control.
• Supports 5, 6, 7, or 8 data bits and 1, 1.5, or 2 stop bits.
• Parity generation and checking (odd, even, none).
• Interrupt generation for various events (transmit empty, receive data available, error conditions).
• Sleep mode for low power consumption.
• 48-pin LQFP package.

Benefits:

• Increased system performance: The large FIFOs reduce CPU intervention, allowing the host processor to focus on other tasks.
• Flexible serial communication: The programmable baud rate generator and data format options allow the device to be configured for a wide range of serial communication protocols.
• Reduced power consumption: The sleep mode minimizes power consumption when the device is not actively transmitting or receiving data.
• Easy integration: The parallel interface simplifies connection to host processors.
• Reliable data transfer: Hardware and software flow control mechanisms ensure reliable data transfer, even at high data rates.

Additional Details:

The ST16C2550IQ48 requires a 3.3V power supply. It operates over a temperature range of -40°C to +85°C. The device includes built-in loopback testing capabilities for diagnostic purposes. The parallel interface supports both Intel and Motorola bus timing. The UART provides full modem control signals, including CTS, RTS, DSR, DTR, RI, and DCD. Register access is performed via the parallel interface, using standard read and write operations. The ST16C2550IQ48 offers a robust and versatile solution for dual-channel serial communication in various embedded systems and industrial applications. It is designed to provide reliable and efficient serial data transfer, while minimizing the load on the host processor.