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SPI bus operations: What is the difference between mode 0 and mode 3?

SPI bus operations: What is the difference between mode 0 and mode 3?

Anonymous
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Infineon SPI Flash supports SPI bus operation Mode 0 and Mode 3.

 

In SPI, there are four different clock phase and polarity combinations, known as modes. Modes 0 and 3 are two of these modes. Here are the differences between the SPI bus operations in Mode 0 and Mode 3:

Mode 0: In Mode 0, the clock starts with a low-level pulse (CPOL = 0) and data is sampled on the leading (falling) edge of the clock signal (CPHA = 0).

Data is stable on the first clock edge and changes on the second. This mode is also known as the "data on leading edge" mode.

Mode 3: In Mode 3, the clock starts with a high-level pulse (CPOL = 1) and data is sampled on the trailing (rising) edge of the clock signal (CPHA = 1).

Data changes on the first clock edge and is stable on the second. This mode is also known as the "data on trailing edge" mode.

The polarity of the clock signal and the order in which data is sampled and transferred differs from one mode to another. In Mode 0, the clock starts low, and the data is sampled on the leading edge of the clock, while in Mode 3, the clock starts high, and data is sampled on the trailing edge of the clock.

The choice of which mode to use depends on the specific application and the requirements of the system. Mode 0 is more commonly used in most cases, while Mode 3 is used in certain specialized applications where high-speed data transfer rates are required.

Translation - Japanese: Cypress SPIバス動作モードのMode 0とMode 3の違いを教えてください。- KBA203732 - Community Translated (JA)

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