UART (Universal Asynchronous Receiver Transmitter)
It is software that directly interacts with your hardware to enable serial communications to other devices.
A "PCI Simple Communications Controller" is usually a PCI modem, but it can be other, sometimes unlikely devices, such as an audio or serial device.
RS-485 is a two wire serial protocol.
UART
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Peter W. Gofton has written: 'Mastering UNIX serial communications' -- subject(s): Operating systems (Computers), UNIX (Computer file) 'Mastering serial communications' -- subject(s): Digital communications, IBM Personal Computer, Programming
Universal Asynchronous Reciever Transmitter (UART) controls the speed of Serial Ports on Computers.
Synchronous serial transmission
fsb...front serial bus
UART
UART (universal asynchronous receiver-transmitter) refers to the logic on the motherboard that controls the serial ports on the board, and is sometimes referred to as the UART 16550.
A dual UART (Universal Asynchronous Receiver-Transmitter) is a hardware component that allows communication with two serial devices simultaneously. It enables the simultaneous transmission and reception of data over two separate UART channels, improving efficiency in applications that require multiple serial connections, such as embedded systems. Typically, it is used in microcontrollers and devices that need to manage multiple serial data streams without interference.