Editing Serial Peripheral Interface (section)

==Alternative terminology==
Various alternative abbreviations for the four common SPI signals are used. (This section omits overbars indicating active-low.)

* Serial clock
** SCK, SCLK, CLK, SCL
* Master Out Slave In (MOSI)
** SIMO, MTSR, SPID - correspond to MOSI on both master and slave devices, connects to each other
** SDI, DI, DIN, SI, SDA - on slave devices; various abbreviations for ''serial data in''; connects to MOSI on master
** SDO, DO, DOUT, SO - on master devices; various abbreviations for ''serial data out''; connects to MOSI on slave
** COPI, PICO for ''peripheral'' and ''controller'',<ref name="OSHWA">{{Cite web |url=https://www.oshwa.org/a-resolution-to-redefine-spi-signal-names/ |title=SPI; OSHWA. |access-date=2023-06-02 |archive-date=2021-01-27 |archive-url=https://web.archive.org/web/20210127234925/https://www.oshwa.org/a-resolution-to-redefine-spi-signal-names |url-status=dead }}</ref><ref name=":5">{{Cite web| title=Product Overview - Translate Voltages for SPI | url=https://www.ti.com/lit/an/scea091a/scea091a.pdf | archive-url=https://web.archive.org/web/20220317120519/https://www.ti.com/lit/an/scea091a/scea091a.pdf | archive-date=2022-03-17}}</ref> or COTI for ''controller'' and ''target''<ref name=":1">{{Cite web |title=Serial Peripheral Interface (SPI) Devices |url=https://www.nxp.com/products/interfaces/ic-spi-i3c-interface-devices/www.nxp.com/pages/:SPI |url-status=live |archive-url=https://web.archive.org/web/20230601020101/https://www.nxp.com/products/interfaces/ic-spi-i3c-interface-devices/spi-interface-devices:SPI |archive-date=2023-06-01 |access-date=2023-07-22 |website=[[NXP]]}}</ref>
* Master In Slave Out (MISO)
** SOMI, MRST, SPIQ - correspond to MISO on both master and slave devices, connects to each other
** SDO, DO, DOUT, SO - on slave devices; connects to MISO on master
** SDI, DI, DIN, SI - on master devices; connects to MISO on slave
** CIPO, POCI,<ref name="OSHWA" /><ref name=":5" /> or CITO<ref name=":1" />
* Slave Select (SS)
** Chip select (CS)
** CE (chip enable)
** Historical: SSEL, NSS, /SS, SS#

[[Microchip Technology|Microchip]] uses ''host'' and ''client'' though keeps the abbreviation MOSI and MISO.<ref>{{Cite web |last=Stoicescu |first=Alin |title=Getting Started with Serial Peripheral Interface (SPI) |url=https://onlinedocs.microchip.com/pr/GUID-EF58F3A9-B49B-4C31-A7EC-B71EBB831870-en-US-5/index.html |url-status=live |archive-url=https://web.archive.org/web/20231221205244/https://onlinedocs.microchip.com/pr/GUID-EF58F3A9-B49B-4C31-A7EC-B71EBB831870-en-US-5/index.html |archive-date=2023-12-21 |access-date=2023-12-21 |website=[[Microchip Technology]]}}</ref>