Hi all,
I have installed the LPS22HHTR on my custom circuit to communicate with a STM32F4x via I2C. I have pulled up the SCL (pin 2), SDA (pin 4), SA0 (pin 5), and CS (pin 6) lines to 3.3V via 4.7k resistors, grounded the two ground pins (8 and 9) and RES (pin 3). I have also provided a 100nF decoupling capacitor for the VDD and Vdd_IO pins and left INT_DRDY floating.
My issue right now is that when i try to call on the device using its address (0b1011101 << 1) and the HAL_I2C_IsDeviceReady() function, I am not getting a response and a NACK is thrown (I2C_FLAG_ADDR = RESET and I2C_FLAG_AF = SET). I have double checked the configuration of the circuit several times and voltages at pins but I'm still not getting a response.
I would appreciate any help as to why this is happening or if I'm doing something wrong.
