[SOLVED] I2c and SPI Maximum num of device can connect

[arunbharathi.arasu]

hi friends,

Any one tel me , What is the maximum num of device can connect in I2c, and SPI.

Thanks in advance.

 

[endaro]

Hello, in I2C you can use 128 devices and in SPI the theoretical max is 4 devices but using mux and binary decode you can use a lot of them.

 

[Gorgon]

In SPI the only real limit is the transfer speed needed, since you normally use the same data and clock line for all devices.

Each device will need a separate strobe or select line, but as already said, that can be decoded by multiplexers.

 

[arunbharathi.arasu]

hi,

Thank you very much....