STM32WB5MMG 1LAYER LAYOUT

[Lafayette]

HY IT'S MY FIRST TIME HERE ASKING ABOUT STM32WB5MMG MCU CIRCUIT BOARD DESIGNE WITH 1 LAYER :

1 - CAN WE ATTACH ALL THE PIN FROM 61 TO 84 TO GND BECAUSE WE DON'T WANT TO USE THIS PINS ?

2 - CAN WE PLACE SOME PADS OR SENSOR(IN MY CASE ACCEL GYRO) CLOSE TO THE MCU (ON THE RIGHT LEFT TOP AND BOTTOM ) ?

3 - CAN WE CONNECT 2 SENSORS ON THE SAME I2C PINS ?

[Remy ISSALYS]

Hello,

1. Yes, you can attach all the pin that you don't used to GND, on software side it's recommended to set these pins in analog input to avoid overconsumption.
2. You can look part 6.2 Layout recommendations of DS13252.
3. Yes, I2C is a multi-master, multi-slave, synchronous, bidirectional, half-duplex serial communication bus. You can refer to this wiki page.

Best Regards