Hot Swapping in I2C?

[chandu.kurapati]

Can devices be added and removed while the system is running (Hot swapping) in I2C ?

if it is possible, why it is possible only for I2C protocol? any specality for I2C Protocol?

can any one explain about it????????????????????????????


Thanks & Reagrds,
Chandu.Kurapati.

 

[Easyrider83]

Sure, it is possible. If device not sending ACK during address stage, that means that it is not accessible or removed.

 

[xenos]

During removal/placement the data and clock values may be corrupted, at least some devices will lose syncronisation..
Error checking and correction is not implemented, so error packets may be received and used from various devices.
The IIC protocol also, hasn't got a standard recovery procedure.

It is not recommended to use it that way.

 

[xenos]

There was a (hardware) extra layer with IC like TCA4311, to solve the data corruption problem.