I fiddle with a digital potentiometer MCP4131 which communicates via the SPI protocol. I've seen several tutorials in which multiple SPI devices are connected to a common Slave Select line and the bits of information overflow from the first Slave device to the second, etc.

I wonder weather would be possible to connect two MCP4131 potentiometers with a common Slave Select line, due to the fact that they have a common MISO/MOSI pin.

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So, shouldn't MISO/MOSI be in different pins, thus connect MISO of the first device to the MOSI of the second one?

I am a bit confused, so any thought would be appreciated. The following articles didn't help me understand much.

MCP4131: How to know what value resistors to use on the multiplexed SPI IO?

MCP4131 resistor on SDI/SDO multiplexed pin?


1 Answer 1


Unlike other digipots that DO have separate MOSI and MISO pins, this part cannot be simply daisy chained to save on IO pins.


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