FRDM-K28F by NXP Semiconductors Design and production,in Spot sales,And can pass Purchasing。FRDM-K28F Price reference $ 45.000000。FRDM-K28F - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information FRDM-K28F Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial