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O que (quem) é USART - definição
SERIAL INTERFACE DEVICE THAT CAN BE PROGRAMMED TO COMMUNICATE ASYNCHRONOUSLY OR SYNCHRONOUSLY
USART; Universal Synchronous/Asynchronous Receiver/Transmitter
USART
Universal Synchronous Asynchronous Receiver / Transmitter (Reference: IC)
Universal synchronous and asynchronous receiver-transmitter
A universal synchronous and asynchronous receiver-transmitter (USART, programmable communications interface or PCI) is a type of a serial interface device that can be programmed to communicate asynchronously or synchronously. See universal asynchronous receiver-transmitter (UART) for a discussion of the asynchronous capabilities of these devices.
UART
![Example of a UART frame. In this diagram, one [[byte]] is sent, consisting of a start bit, followed by eight data bits (D0-7), and two stop bit, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties. The "stop bit" is actually a "stop period"; the stop period of the transmitter may be arbitrarily long. It cannot be shorter than a specified amount, usually 1 to 2 bit times. The receiver requires a shorter stop period than the transmitter. At the end of each data frame, the receiver stops briefly to wait for the next start bit. It is this difference which keeps the transmitter and receiver synchronized.
BCLK = Base Clock](https://commons.wikimedia.org/wiki/Special:FilePath/UART-signal.png?width=200 "Example of a UART frame. In this diagram, one [[byte]] is sent, consisting of a start bit, followed by eight data bits (D0-7), and two stop bit, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties. The \"stop bit\" is actually a \"stop period\"; the stop period of the transmitter may be arbitrarily long. It cannot be shorter than a specified amount, usually 1 to 2 bit times. The receiver requires a shorter stop period than the transmitter. At the end of each data frame, the receiver stops briefly to wait for the next start bit. It is this difference which keeps the transmitter and receiver synchronized.
BCLK = Base Clock")
COMPUTER HARDWARE DEVICE
UART; Serial uart; UART overrun; Uart; Universal asynchronous receiver transmitter; Serial Communication Interface; 16450; Serial Communication Controller; Universal asynchronous receiver/transmitter; 16C450; 16450 UART; 16450 (UART); NS16450; PC16450C; Serial communication interface; Motorola 6850
Universal Asynchronous Receive and Transmit
Wikipédia
Universal synchronous and asynchronous receiver-transmitter
A universal synchronous and asynchronous receiver-transmitter (USART, programmable communications interface or PCI) is a type of a serial interface device that can be programmed to communicate asynchronously or synchronously. See universal asynchronous receiver-transmitter (UART) for a discussion of the asynchronous capabilities of these devices.
