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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.
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.
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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.
The 28L92 is an upwardly compatible version of the 26C92, featuring selectable 8- or 16-byte transmitter and receiver FIFOs, improved support for extended data rates, and faster bus timing characteristics, making the device more suitable for use with high performance microprocessors.
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The agreements are: SPI-3 – Packet Interface for Physical and Link Layers for OC-48 (2.488 Gbit/s) [1]; SPI-4.1 – System Physical Interface Level 4 (SPI-4) Phase 1: A System Interface for Interconnection Between Physical and Link Layer, or Peer-to-Peer Entities Operating at an OC-192 Rate (10 Gbit/s).