Maximum number of SPI slaves

[Sugiyama_DME]

Hi,

How many SPI slaves can I connect to nRF52832 as an SPI master?

I would like to know the maximum number of SPI slaves which can be connected to nRF52832 as an SPI master.

I am using nRF52832 as an SPI master.

I would like to implement SPI communication with an SPI master and five SPI slaves on PCB.

I am concerned whether SPI communication works fine by connecting many SPI slaves to nRF52832 as an SPI master or not.

Best regards,

[Kenneth]

How many SPI slaves can I connect to nRF52832 as an SPI master?

This is really only limited by the amount of gpio's you have available to use as chip select pin, the chip select pin is used to choose the slave SPI you are writing/reading to. So if you want to have 5 SPI slaves, then you need a total of 5 chip select + 3 spi (clock, miso, mosi).

[Sugiyama_DME]

Hi, Kenneth,

Thank you for your help.

> This is really only limited by the amount of gpio's you have available to use as chip select pin, the chip select pin is used to choose the slave SPI you are writing/reading to. So if you want to have 5 SPI slaves, then you need a total of 5 chip select + 3 spi (clock, miso, mosi).

I understood your reply.

Best regards, 

Sugiyama_DME