Switch 2 (S2) can only connect to ground ... Scenario 4 – Bus Pirate interfacing a 1-wire or I2C bus between 1.8volts and 5volts 1-wire and I2C are bi-directional, open collector buses.

Remember – an I2C bus can be scanned ... Hosts often run at 100kHz, but it’s common that you can up the frequency and switch it into 400kHz; however, there’s hosts that are hardwired ...

I2C is a two-wire, bidirectional bus protocol that enables effective communication between one master (or multiple masters) and one or more slave devices. It is a straightforward, half-Duplex, ...

The SPI controller supports full-duplex communication at speeds up to 10 MB/s, operating as either a controller or a target on a single-controller bus with a four-wire ... lets system developers ...