Clock signal is a square-wave oscillating digital signal. We can define a clock signal as a particular type of signal that oscillates between a high and a low state.
What is clock phase and clock polarity ? What is difference between clock phase and clock polarity?

 

Hello,

Will this page help?
http://dlnware.com/dll/Clock-Phase-and-Polarity

Bertus

 

N.B. For a single, stand-alone, clock signal the terms only have a well defined meaning within the context of the SPI (Serial Peripheral Interface) specification. It has to do with when data is valid and which edge of the clock is to be used in performing bus operations. Outside of that specification the terms have no particular meaning.

 

Clock polarity is either High or Low, and Phase relates to whether the data is clocked on the Rising edge or Falling..