SPI modes

SPIS supports SPI modes [0..3]. Modes CPOL and CPHA are set in the CONFIG register.

Table 1. SPI modes

Mode	Clock polarity (CPOL)	Clock phase (CPHA)
SPI_MODE0	0 (Active High)	0 (Sample on Leading)
SPI_MODE1	0 (Active High)	1 (Sample on Trailing)
SPI_MODE2	1 (Active Low)	0 (Sample on Leading)
SPI_MODE3	1 (Active Low)	1 (Sample on Trailing)