Daisy chain circuit topology

[engr_joni_ee]

I am wondering if I2C bus is a kind of daisy chain topology in which we have one master and multiple slave devices ? or how we can explain daisy chain topology ?

 

[FvM]

Daisy chain involves a series connection where the output of one device is feeding the next in line. E.g. SPI can optionally use daisy chain configuration for data. Clock and chip select are wired in parallel.

I2C can't use daisy chain topology because data line is bidirectional.

--- Updated Nov 1, 2023 ---

See https://en.wikipedia.org/wiki/Network_topology#Daisy_chain

 

[engr_joni_ee]

This means that daisy chain topology is like series connection.

 

[betwixt]

Daisy chain is where you put information in at one end of the chain and each device passes it on to the next until the end of the chain is reached.

As FvM states, it is difficult if not impossible to daisy chain I2C devices because the lines are both bidirectional so cannot 'pass through' to or from another device without the signals clashing. When multiple I2C devices share the same wires they are in parallel, not daisy chained and the individual device is selected on the bus by recognizing it's address bits sent from the master.

Brian.