Which SPI Mode is used by SigmaDSP Devices?

Document created by BrettG on Oct 3, 2012
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The SigmaDSP products (and most devices from Analog Devices with SPI ports) use SPI Mode 3, in which CPOL = 1 and CPHA = 1.

  • CPHA = 1: The data changes on the falling edge of the clock and is read/written on the rising edge of the clock.
  • CPOL = 1: When the bus is idle, the clock signal is high.


For reference:

2012.10.03 16.50.00.jpg

(image from Wikimedia Commons, http://commons.wikimedia.org)



(image from Total Phase, http://www.totalphase.com/)


This FAQ was generated from the following discussion: Looking for detailed info on adau1961 spi protocol

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