Features List

• 8 Port SPI Multiplexer for the Raspberry Pi
• Connects to the SPI pins on the Raspberry Pi
• Supports SPI Star and Daisy-chain topologies
• 3.3V Power from the Raspberry Pi
  • 50 mA limit from Raspberry Pi
• 40-pin Raspberry Pi connector

SPI Star Topology

• MISO from all slaves are wired together
• MOSI, SCLK is sent out to all ports
• SS (Slave Select) is separate for each of the 8 ports
• A0-A2 lines from Raspberry Pi control the port number

SPI Daisy-Chain Topology

• MOSI / MISO from all slaves are connected in series
• SCLK is sent out to all ports
• Individual (Slave Select) is separate for each daisy-chain
• A0-A2 lines from Raspberry Pi control the port number

Why did you make it?

Somebody asked me to make one. It seemed like a good idea. SPI with only one chip select seems pretty limiting,

What makes it special?

It's pretty simple to program. Set the three address bits and do an SPI transmission as usual.