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Serial interface of ADXL355

Question asked by Mochi on Oct 15, 2017
Latest reply on Oct 19, 2017 by Mochi

Please tell me about the serial interface of ADXL355 if you like.
The data sheet is "The 4-wire serial interface communicates in either the SPI or I2C protocol. It affectively autodetects the format being used, requiring no configuration control to select the format."(Rev. 0 | Page 25 of 42)
My customers are very cautious.
My customer wants to connect MPU and ADXL355 with SPI.
However, they are worried that the automatic mechanism incorrectly connects to the I2C format.
Please tell me how the mechanism discriminates between I2C and SPI to make them feel secure.

Best regards