Serial Peripheral Interface (SPI)

wikipedia:Serial Peripheral Interface can be used to connect a wide variety of peripherals - displays, network controllers (Ethernet, CAN bus), UARTs, etc

/sys/bus/spi/devices/spi?

• SCLK: Serial Clock (output from master)
• MOSI: Master Out Slave In (data output from master)
• MISO: Master In Slave Out (data output from slave)
• SS: Slave Select (often active low, output from master)

• spi-pipe: https://manpages.debian.org/testing/spi-tools/spi-pipe.1.en.html

See also

• Firewire
• Ethernet In-Band Access (IBA)
• GPIO
• UART
• Serial Peripheral Interface (SPI), /sys/bus/spi/, Quad I/O
• Serial, SPI, virsh console
• Ethernet: MII, MDI, bonding, etherchannel, STP, ARP, MAC, STP, Jumbo frames, 802.1X, MTU, Ethernet In-Band Access (IBA), LACP, Multicast, Broadcast, SPI