topic Re: How to access PTA2 and PTA3 pins for I2C communication on FRDM-KE02Z board? in Kinetis Microcontrollers

How to access PTA2 and PTA3 pins for I2C communication on FRDM-KE02Z board?

mstagg — Thu, 14 May 2015 15:38:01 GMT

The board uses PTA2 and PTA3 for I2C communications, but both of these pins are already used by the on-board accelerometer. PTB6 and PTB7 are the other options, but they are running an on-board clock. How can I use I2C communication on this board if all the allocated pins are already used by on-board components?

Please don't yell at me. I'm an intern.

Re: How to access PTA2 and PTA3 pins for I2C communication on FRDM-KE02Z board?

mjbcswitzerland — Fri, 15 May 2015 15:59:17 GMT

Hi Matthew

I2C is a bus that can have many devices on it so the fact that the accelerometer is connected to PA2 and PA3 don't restrict you from using the same bus lines for furter devices with difference addresses.

Regards

Mark

Kinetis: µTasker Kinetis support

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Re: How to access PTA2 and PTA3 pins for I2C communication on FRDM-KE02Z board?

kerryzhou — Mon, 18 May 2015 02:10:45 GMT

Hi Matthew Stagg,

mjbcswitzerland is correct, you still can use PTA2 and PTA3 pin, you just need to define your slave address different from the on-board acelerometer adress.

Wish it helps you!

Have a great day,

Jingjing

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