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SPI timing diagram for both clock polarities and phases. Data bits output on blue lines if CPHA=0, or on red lines if CPHA=1, and sample on opposite-colored lines. Numbers identify data bits. Z indicates high impedance. The SPI timing diagram shown is further described below: CPOL represents the polarity of the clock.
Date/Time Thumbnail Dimensions User Comment; current: 21:55, 2 August 2023: 330 × 190 (153 KB): Em3rgent0rdr: colored the MISO and MOSI numbered bit signals: 23:26, 22 July 2023
The timing diagram example on the right describes the Serial Peripheral Interface (SPI) Bus. Most SPI master nodes can set the clock polarity (CPOL) and clock phase (CPHA) with respect to the data. This timing diagram shows the clock for both values of CPOL and the values for the two data lines (MISO & MOSI) for each value of CPHA.
Date/Time Thumbnail Dimensions User Comment; current: 02:37, 20 December 2006: 430 × 250 (221 KB): Cburnett: Doh, messed up the upload. This should be the blue lined one.
This image is a derivative work of the following images: File:SPI_timing_diagram.svg licensed with Cc-by-sa-3.0-migrated, GFDL . 2006-12-20T02:37:46Z Cburnett 430x250 (226452 Bytes) Doh, messed up the upload.
Devices implementing SPI are typically specified with line rates of 700~800 Mbit/s and in some cases up to 1 Gbit/s. The latest version is SPI 4 Phase 2 also known as SPI 4.2 delivers bandwidth of up to 16 Gbit/s for a 16 bit interface. The Interlaken protocol, a close variant of SPI-5 replaced the System Packet Interface in the marketplace.
An example SPI with a master and three slave select lines. Note that all four chips share the SCLK, MISO, and MOSI lines but each slave has its own slave select. Chip select (CS) or slave select (SS) is the name of a control line in digital electronics used to select one (or a set) of integrated circuits (commonly called "chips") out of several connected to the same computer bus, usually ...
[[Category:SPI templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:SPI templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.