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limit on chip select pins for a microcontroller to be used in SPI communication?

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myatham

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Hi,
Is there any limit how many chip selects an SPI module in a microcontroller supports if i use GPIOs for chip select pins?
 

Tahmid

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The limit is the number of GPIO pins you can use - that which you have available or by increasing count by using shift register, port expander, etc. Just don't place the devices too far away.

Hope this helps.
Tahmid.
 

doraemon

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Hello!
Just don't place the devices too far away
Would be good to explain what you mean by too far away.
Is it 20 cm? 1m? 100 m? 1km?

Dora.
 

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