licenses: You may select the license of your choice. English German Serial Peripheral Interface (SPI) bus Kommunikation zwischen einem Master und einem Slave
DescriptionSPI three slaves daisy chained.svg English: A Serial Peripheral Interface (SPI) bus with a single master and three slaves daisy chained together
shift-registers: one in the master and one in the slave. After 8 single-bit transfers the master and slave will have transfered each other's register value