The VL16C451-QC, produced by VLSI Solution, is a single-channel UART (Universal Asynchronous Receiver/Transmitter) designed for facilitating serial communication. This UART enables asynchronous data transfer between a microcontroller or microprocessor and peripheral devices, thereby providing robust and efficient communication in numerous embedded systems.

Applications

• Embedded Systems: Found in a multitude of embedded applications requiring serial communication, such as point-of-sale systems, industrial automation equipment, and data logging devices.
• Serial Communication Interfaces: Integrated into devices needing to communicate via RS-232, RS-485, and other serial communication standards.
• Instrumentation and Control Systems: Used in test and measurement instruments to manage data flow and control signals.
• Networking Equipment: Commonly utilized in networking hardware to offer console access and facilitate system management.

Features

• Single-Channel UART: Supplies one dedicated channel for serial data transmission.
• Asynchronous Communication: Operates asynchronously, negating the requirement for a synchronous clock signal during data transfer.
• Programmable Baud Rate: Features a configurable baud rate generator that allows the communication speed to be adjusted to various settings.
• Data Framing Options: Accommodates a variety of data frame formats, including adjustable data bit lengths, parity settings, and configurable stop bits.
• Interrupt Generation: Generates interrupts to signal various events, such as incoming data, transmission completion, and detection of errors.
• FIFO Buffering: Implements FIFO (First-In, First-Out) buffers for both transmitting and receiving data to enhance overall data throughput and lower CPU utilization.
• Modem Control Signals: Equipped with modem control signals like RTS, CTS, DSR, DTR, and RI for executing hardware flow control.
• Loopback Testing: Includes a loopback mode designed for self-diagnostic testing and device verification.

Benefits

• Reliable Data Transmission: Provides a robust mechanism for ensuring data reliability via error detection and correction.
• Highly Configurable: Delivers extensive configuration options for the baud rate, data format, and interrupt settings, which allows for tailored performance based on specific application demands.
• Enhanced Data Throughput: FIFO buffers improve the handling and transmission of data bursts, leading to improved throughput.
• Reduced CPU Load: The use of interrupt generation and FIFO buffers significantly reduces CPU intervention, freeing up processing capacity for other computational tasks.
• Simplified Integration: Specifically engineered for simple integration into diverse embedded systems that utilize standard serial communication protocols.
• Hardware Flow Control Support: Modem control signals provide hardware flow control, which is vital for avoiding data loss at higher communication speeds.

Additional Details

The VL16C451-QC typically operates with a power supply of either 3.3V or 5V. It is commonly packaged as a QFP (Quad Flat Package), facilitating easy surface mounting on a Printed Circuit Board (PCB). The UART supports multiple data formats that include 5, 6, 7, or 8 data bits, and various parity options such as odd, even, or no parity. The baud rate is programmable using an internal generator, accommodating various communication speeds from standard rates to custom configurations. The FIFO buffers usually have a size of 16 bytes or more to optimize data management. Comprehensive datasheets are available and contain detailed information about pin configurations, electrical characteristics, and interface programming specifications.