LPC MicrocontrollersのトピックProtection diodes https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543469#M12702 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by IanB on Thu Apr 16 13:22:53 MST 2015</STRONG><BR /><SPAN>Can someone give me the circuit diagram for the protection circuitry on a GPIO pin.</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:43:03 GMT lpcware 2016-06-15T19:43:03Z Protection diodes https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543469#M12702 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by IanB on Thu Apr 16 13:22:53 MST 2015</STRONG><BR /><SPAN>Can someone give me the circuit diagram for the protection circuitry on a GPIO pin.</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:43:03 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543469#M12702 lpcware 2016-06-15T19:43:03Z Re: Protection diodes https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543470#M12703 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by R2D2 on Thu Apr 16 13:27:12 MST 2015</STRONG><BR /><SPAN>Google recommends Kevin&nbsp; :bigsmile: </SPAN><BR /><BR /><SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.kevinmfodor.com%2Fhome%2FMy-Blog%2Fmicrocontrollerinputprotectiontechniques" rel="nofollow" target="_blank">http://www.kevinmfodor.com/home/My-Blog/microcontrollerinputprotectiontechniques</A></SPAN></BODY></HTML> Wed, 15 Jun 2016 19:43:04 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543470#M12703 lpcware 2016-06-15T19:43:04Z Re: Protection diodes https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543471#M12704 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by IanB on Fri Apr 17 03:18:29 MST 2015</STRONG><BR /><SPAN>Sorry, I was too vague.</SPAN><BR /><SPAN>What I meant to ask is for a circuit diagram of the internal protection circuitry on a GPIO pin.</SPAN><BR /><BR /><SPAN>These devices are 5V tolerant, so they don't have the same protection circuitry as your bog-standard CMOS, because there is no diode to Vdd. I was wondering what was there to prevent damage from positive-going spikes. Is there a zener?</SPAN><BR /><BR /><SPAN>Not all the family is the same as LPC11xx is 5V tolerant, and LPC12xx isn't, and it has diodes from input to Vdd.</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:43:05 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Protection-diodes/m-p/543471#M12704 lpcware 2016-06-15T19:43:05Z