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

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endaro

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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

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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.
 
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