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LIS2DH12 communication problem

Question asked by Michal Dubovsky on May 29, 2017
Latest reply on May 30, 2017 by Michal Dubovsky

Hello, I am using two LIS2DH12 sensors in my project. I am using I2C communication interface. The one with the address pin high (IC4, address 0b0011001x) is working OK, but the one with the address pin low (IC5, address 0b0011000x) is not communicating. It does not even ACK the address. I tried swapping the IC for a new one or even swapping the entire PCB but the problem persists. What could I be doing wrong?

 

schematic of two mems ICsoscilloscope trace of a MCU trying to communicate with the IC5

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