glossary:glossary_u
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glossary:glossary_u [2013/04/07 08:57] – created Anotheran | glossary:glossary_u [2021/03/21 01:41] – [UART] tgerbic | ||
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+ | =====UART or USART===== | ||
+ | **U**niversal **A**synchronous **R**eceiver / **T**ransmitter | ||
+ | | ||
+ | **U**niversal **A**synchronous / **S**ynchronous **R**eceiver / **T**ransmitter | ||
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+ | A UART is a logic IC that typically converts parallel data to an asynchronous (async) serial stream or its reverse. Some UARTs also incorporate data buffers, serial clock circuits and control line logic/ | ||
+ | In addition to the UART, there is a similar IC called a USART. This IC also includes additional circuitry to support synchronous (sync) serial communications. | ||
+ | |||
+ | The terms async and sync serial differ in the way they are transmitted. Sync serial has the transmitter and receiver clocked at exactly the same rate so it is clear where every bit of data is located in the serial stream. | ||
+ | Async serial differs in that the transmitter and receiver only need to be close in clock speed and the receiver samples the incoming data stream to determine where the start of the serial data occurs and where the data bits are. | ||
===== Unregulated power supply ===== | ===== Unregulated power supply ===== | ||
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- | The shorthand term used to denote a standard Universal Serial Bus developed to allow the interconnection of many peripheral devices such as mice, keyboards, joysticks, scanners etc., to a computer such as IBM compatible and Apple PCs. Developed by collaboration amongst leading companies in the computer and electronics industry, the specifications are standardised | + | The shorthand term used to denote a standard Universal Serial Bus developed to allow the interconnection of many peripheral devices such as mice, keyboards, joysticks, scanners etc., to a computer such as IBM compatible and Apple PCs. Developed by collaboration amongst leading companies in the computer and electronics industry, the specifications are standardized |
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+ | USB interface include at least two data lines and two power lines. This allows not only data transfer but a power connection for a device plugged into the USB port. | ||
+ | \\ [[http:// | ||
glossary/glossary_u.txt · Last modified: 2021/09/24 02:59 by Wayne