topic K10D input protection diode in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332308#M15607 <HTML><HEAD></HEAD><BODY><P>The PTC1 pin on the K10D is configured for input capture function, but it also has an alternate analog function which is not used in the design.</P><P></P><P>Is the input protection to VDD through a clamping diode still available when configured for input capture, or just when the pin is configured as an analog function?</P><P></P><P>What kind of internal protection is offered on the default Port IO pins?</P><P></P><P>Thanks in advance.</P><P>Scott</P></BODY></HTML> Tue, 11 Nov 2014 21:57:39 GMT ScottKerstein 2014-11-11T21:57:39Z K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332308#M15607 <HTML><HEAD></HEAD><BODY><P>The PTC1 pin on the K10D is configured for input capture function, but it also has an alternate analog function which is not used in the design.</P><P></P><P>Is the input protection to VDD through a clamping diode still available when configured for input capture, or just when the pin is configured as an analog function?</P><P></P><P>What kind of internal protection is offered on the default Port IO pins?</P><P></P><P>Thanks in advance.</P><P>Scott</P></BODY></HTML> Tue, 11 Nov 2014 21:57:39 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332308#M15607 ScottKerstein 2014-11-11T21:57:39Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332309#M15608 <HTML><HEAD></HEAD><BODY><P>Any pin that CAN be GPIO physically does NOT have said diode to VDD, and can accept -0.3 to 5.5V at any time, in any mode.&nbsp; The protection elements do not change based on 'pin mode'</P></BODY></HTML> Wed, 12 Nov 2014 15:39:24 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332309#M15608 egoodii 2014-11-12T15:39:24Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332310#M15609 <HTML><HEAD></HEAD><BODY><P>Hi Scott,</P><P></P><P>The ESD protection circuit (clamping diode) is applied for each port IO pin, whatever it configured for input capture or analog function.</P><P><BR />Wish it helps.<BR />best regards <BR />Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 13 Nov 2014 07:52:34 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332310#M15609 Hui_Ma 2014-11-13T07:52:34Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332311#M15610 <HTML><HEAD></HEAD><BODY><P>Thanks.&nbsp; It appears the other I/O isn't protect.&nbsp; Why?</P></BODY></HTML> Thu, 13 Nov 2014 22:26:37 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332311#M15610 ScottKerstein 2014-11-13T22:26:37Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332312#M15611 <HTML><HEAD></HEAD><BODY><P>I am not sure "the other I/O" means?</P><P></P><P>Best regards,</P><P>Ma Hui</P></BODY></HTML> Fri, 14 Nov 2014 02:50:32 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332312#M15611 Hui_Ma 2014-11-14T02:50:32Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332313#M15612 <HTML><HEAD></HEAD><BODY><P>There is no diode to VDD on all GPIO-capable pins to allow 5V input signal level tolerance, irrespective of actual Vdd voltage.</P></BODY></HTML> Fri, 14 Nov 2014 03:26:50 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332313#M15612 egoodii 2014-11-14T03:26:50Z Re: K10D input protection diode https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332314#M15613 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>For the 5V tolerant I/O with special design, the diode not connect to VDD, while instead to a ESD Bus.</P><P><BR />Wish it helps.<BR />best regards <BR />Ma Hui</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 17 Nov 2014 08:29:33 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K10D-input-protection-diode/m-p/332314#M15613 Hui_Ma 2014-11-17T08:29:33Z