Cpol

Serial Peripheral Interface Bus - Operation - Data Transmission - Clock Polarity and Phase
... Block Guide names these two options as CPOL and CPHA respectively, and most vendors have adopted that convention ... At CPOL=0 the base value of the clock is zero For CPHA=0, data is captured on the clock's rising edge (low→high transition) and data is propagated on a falling edge (high→low clock transition) ... At CPOL=1 the base value of the clock is one (inversion of CPOL=0) For CPHA=0, data is captured on clock's falling edge and data is propagated on a rising edge ...

Digital Timing Diagram - Example: SPI Bus Timing
... Most SPI master nodes have the ability to 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 as well as the values for the two data lines (MISO MOSI) for each value of CPHA ... SPI operates in the following way The master determines an appropriate CPOL CPHA value The master pulls down the slave select (SS) line for a specific slave chip The ...

Code Project Open License
... The Code Project Open License (CPOL) is a software license published by The Code Project, a community site for software developers ... The Code Project has a comparison of the CPOL to open-source licenses on their site ... The CPOL is strictly for source code that is gratis, but is not recognized as a free or open license by the Free Software Foundation due to the restrictions within the CPOL forbidding ...

Serial Peripheral Interface Bus - Operation - Data Transmission - Mode Numbers
... to as modes which are commonly numbered according to the following convention, with CPOL as the high order bit and CPHA as the low order bit Mode CPOL CPHA 1 ... Another commonly used ... the value '(0, 1)' would indicate CPOL=0 and CPHA=1 ...