FRDM-STBC-AGM01 voltage

[def152]

Hi,

I managed to get the board working but there is one thing that bothers me. Arduino is a 5V device but max VDD for FXAS21002C and FXOS8700CQ is 3.3V. So the SDA and SCL (or SCLK and MOSI) coming from arduino is 5V. I read the datasheet but there is no info about 5V tolarance. Can it damage in any way FXAS21002C or FXOS8700CQ?

[anthonyduhamel]

Hi Karol,

I²C pin (SDA and SCL)  are usually "open drain", and pull up resistors are required to make the communication works. So you would be able to drive the board with 2 pull up resistors connected to 3.3V.

Please check out the following webpage: Arduino Playground - I2CBi-directionalLevelShifter

Thanks,

Anthony