https://gunkies.org/w/index.php?title=Shift_register&feed=atom&action=historyShift register - Revision history2024-03-29T08:42:13ZRevision history for this page on the wikiMediaWiki 1.30.0https://gunkies.org/w/index.php?title=Shift_register&diff=23811&oldid=prevJnc: Good summary2021-08-04T18:43:28Z<p>Good summary</p>
<p><b>New page</b></p><div>A '''shift register''' is a [[logic]] element consisting of a number of storage elements (usually [[flip-flop|latches]]) arranged in a linear array; information, once in the array, can then be shifted (hence the name) along it. The array has two [[interface]]s; input and output. Either can be [[parallel]] (which allows the entire array to be loaded at once), or [[serial]], with information being entered or removed at one end of the array. The choice of input and output means will depend on the purpose of the shift register. For instance, a shift register in a [[Central Processing Unit|CPU]], used for arithmetic purposes, would typically be both loaded and read in parallel.<br />
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Another common use of a shift register is to take data being sent between two subsystems in serial form, using a single [[conductor]] (down which information is sent a bit at a time), and transforming it into a parallel form for use; this will require a shift register with serial input and parallel output. The reverse transformation, allowing information to be sent out of a subsystem over a single serial link, is also seen. In the early days of computers, when logic was extremely expensive, the additional cost of multiple conductors (for parallel transmission) could avoid the need for extra logic (and also yielded higher performance); now, when gates are essentially free, minimizing the number of connections is more important.<br />
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[[Category: Hardware Basics]]</div>Jnc