How many Max Slaves in SPI

Posted on February 02, 2018 at 10:19

In SPI protocol, how many maximum slaves can I connect to master(nucleo STM32F103RB)?

#stm32f103rb #spi-communication #nucleo-stm

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Senior III

Posted on February 02, 2018 at 11:52

Basically, SPI was intended as point-to-point protocol, i.e. one master, one slave.

You can add more slaves by using more or less elaborate Slave-Select mechanisms, that selects one slave out of <n>.

However, when using software slave select, you might run into trouble using interrupts or DMA for transfers.

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