Universal synchronous and asynchronous receiver-transmitter: Difference between revisions

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[[File:USART.png | thumb | right | alt=An example of a USART | An example of a USART]]A '''universal synchronous and asynchronous receiver-transmitter''' ('''USART''', '''programmable communications interface''' or '''PCI''')<ref>{{Cite web |date=2017-12-04 |title=8251A-Programmable Communication Interface Notes - Computer Science Engineering (CSE) |url=https://edurev.in/studytube/8251A-Programmable-Communication-Interface-Micropr/75b44fe5-ea73-4bc7-88e4-4a74b1f65084_t |access-date=2022-07-02 |website=EDUREV.IN |language=en}}</ref> 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.

== Purpose and history ==

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|Zilog

|"SIO" Z8440&ndash;4/Z84C40&ndash;4

|Serial communicationsinput/output controller

|Zilog #ps0183, Z8440/1/2/3/4 and Z84C40/1/2/3/4 data sheet<ref name="zilog_com-ps0183">{{cite web|title=Zilog Product specification Z8440/1/2/4, Z84C40/1/2/3/4. Serial input/output controller|url=http://www.zilog.com/docs/z80/ps0183.pdf}} 090529 zilog.com</ref>

|-