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An asynchronous communication service or application does not require a constant bit rate. [2] Examples are file transfer, email and the World Wide Web. An example of the opposite, a synchronous communication service, is realtime streaming media, for example IP telephony, IPTV and video conferencing.
The primary focus of this article is asynchronous control in digital electronic systems. [1] [2] In a synchronous system, operations (instructions, calculations, logic, etc.) are coordinated by one, or more, centralized clock signals. An asynchronous system, in contrast, has no global clock. Asynchronous systems do not depend on strict arrival ...
Asynchronous method dispatch (AMD), a data communication method used when there is a need for the server side to handle a large number of long lasting client requests. [3] Using synchronous method dispatch (SMD), this scenario may turn the server into an unavailable busy state resulting in a connection failure response caused by a network ...
Asynchrony (computer programming), the occurrence of events independent of the main program flow, and ways to deal with such events Async/await; Asynchronous system, a system having no global clock, instead operating under distributed control Asynchronous circuit, a sequential digital logic circuit not governed by a clock circuit or signal
The asynchronous signalling methods use only one signal. The receiver uses transitions on that signal to figure out the transmitter bit rate ("autobaud") and timing, and set a local clock to the proper timing, typically using a phase-locked loop (PLL) to synchronize with the transmission rate. A pulse from the local clock indicates when another ...
Since transmission of a single or multiple characters may take a long time relative to CPU speeds, a UART maintains a flag showing busy status so that the host system knows if there is at least one character in the transmit buffer or shift register; "ready for next character(s)" may also be signaled with an interrupt.
Asynchronous reprojection is a class of computer graphics technologies aimed ensuring a virtual reality headset's responsiveness to user motion even when the GPU isn't able to keep up with the headset's target frame rate. [1]
If the system incorporates a buffer between processes (e.g., a Unix shell pipe), then data will accumulate and be processed at the reader's maximum rate. There are some circumstances in which this is a desirable characteristic (e.g. piping a file over SSH , or if all data in the set is important, and the reader's output does not need to be ...