Markel 2 Posted May 16, 2017 Share Posted May 16, 2017 Hi, I have this MOSFET Power Circuitry connected to LIS3DH Accelerometer. The LIS3DH Accelerometer is connected to TI BLE CC2640R2F. The expected behaviour is if ACC_VCC is 0, it will power on the LIS3DH Accelerometer, and if ACC_VCC is 1, it will turn off the LIS3DH Accelerometer. However, if I initialize the open the I2C pins at program initialization by calling SensorI2C_open();. This is the behavior below. By normal knowledge The I2C pins connected to the LIS3DH Accelerometer should not affect the MOSFET Power Circuitry. I suspect the MOSFET Power Circuitry is wrong. Can anyone here give me tips what could be wrong. 1. Set ACC_VCC to 1, to turn off accelerometer. 2. VACC is measured at 3.2 V, which should not be. 3. Set ACC_VCC to 0, to turn on accelerometer. 4. VACC is measured at 3.2V, which is correct. Attached is the Accelerometer Circuitry.. Quote Link to post Share on other sites
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