topic Freescale Kinetis K20 based MK20FN1M0VMD12 reset state question in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426052#M24545 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am working with MK20FN1M0VMD12 K20 based processor. I am looking at the default pin assignment in the datasheet, for example the pin "PTD11" says "disabled" under default. I understand that this means the pin will be disabled on reset. How does it behave exactly? Will PTD11 be pulled up/down? What exactly does "disabled" mean? Will I need to put an external (current limiting or pull up) resistor to this pin for microcontroller safety? </P><P></P><P>Thanks for your time,</P><P>Sherry </P></BODY></HTML> Fri, 23 Oct 2015 14:35:09 GMT sherry_zahid 2015-10-23T14:35:09Z Freescale Kinetis K20 based MK20FN1M0VMD12 reset state question https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426052#M24545 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am working with MK20FN1M0VMD12 K20 based processor. I am looking at the default pin assignment in the datasheet, for example the pin "PTD11" says "disabled" under default. I understand that this means the pin will be disabled on reset. How does it behave exactly? Will PTD11 be pulled up/down? What exactly does "disabled" mean? Will I need to put an external (current limiting or pull up) resistor to this pin for microcontroller safety? </P><P></P><P>Thanks for your time,</P><P>Sherry </P></BODY></HTML> Fri, 23 Oct 2015 14:35:09 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426052#M24545 sherry_zahid 2015-10-23T14:35:09Z Re: Freescale Kinetis K20 based MK20FN1M0VMD12 reset state question https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426053#M24546 <HTML><HEAD></HEAD><BODY><P>Hi, Sherry</P><P></P><P>Disable means high-impedance. So you have leave this pin floating.</P><P></P><P>Hope my reply can help you.</P><P></P><P></P><P>Best Regards</P><P>Paul</P></BODY></HTML> Mon, 26 Oct 2015 06:35:39 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426053#M24546 Paul_Tian 2015-10-26T06:35:39Z Re: Freescale Kinetis K20 based MK20FN1M0VMD12 reset state question https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426054#M24547 <HTML><HEAD></HEAD><BODY><P>Thanks Paul</P></BODY></HTML> Mon, 26 Oct 2015 13:44:08 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Freescale-Kinetis-K20-based-MK20FN1M0VMD12-reset-state-question/m-p/426054#M24547 sherry_zahid 2015-10-26T13:44:08Z