Pin Connections for I2C interface with FXAS21002C and FXOS8700C sensors

[akshayingle]

Hi I am new to IMU sensors, I am using BRKT-STBC-AGM01 breakout board and trying to interface my MCU with the board. I am confused regarding the pin connections. 

first I am trying to interface Gyro sensor using I2C - FXAS21002C, later I will be interfacing FXOS8700C. 

The pin connections I have used for Gyroscope

Sensor Pin        MCU Pins

VDDIO                VDD

VDD                    VDD

SCL                    SCL 

SDA                   SDA

GND                  GND 

Am I missing anything else regarding pin connections? I haven't used interrupt pins yet. I want to operate the sensors in active mode. 

Kindly guide me 

[TomasVaverka]

Hi Akshay,

Please see below the schematic and pinout diagram.

So you need to connect the following pins to your MCU:

SCL1 - J3.4

SDA1 - J3.5

VDD_21002 - J3.7

VDDIO_21002 - J3.9

GND - J4.5

RST_21002 - J4.7 - connect to VDDIO_21002 if not used by your MCU

Note that the default 7-bit I2C slave address is 0x20 as SA0_MISO pin is tied to GND.

You might find useful also my simple bare-metal example project available here.

Hope it helps.

Best regards,

Tomas