I2C on K66F

[a8Chcx]

Hi,

I am using K66F MCU for my controller.

My question: What is the voltage level allowed for I2C pins? Can I use the pull-up resisters to 5VDC on SDA and SCL? Or I have to use 3.3VDC for pull-up?

Thanks,

Christie

[Miguel04 · Accepted solution]

Hi @a8Chcx 

I recommend you to use a pullup to 3.3V, the FRDM-K66 uses 3.3V pullups with the ACCELEROMETER AND MAGNETOMETER internal sensors.

Best Regards, Miguel.