LPCXpresso IDEのトピック5V tolerant input https://community.nxp.com/t5/LPCXpresso-IDE/5V-tolerant-input/m-p/534940#M4357 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by 256Doofus on Wed Feb 08 14:36:01 MST 2012</STRONG><BR /><SPAN>Some question around 5V tolerant input on lpc11Cxx.</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>I do remeber that i read in the datasheet that for the input to be 5V tolerant, the powersupply to the µC need to be present. I am not able to find that anymore, so I can not pinpoint that. Can someone verify this?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>If so, normaly you have 5V first, and use a voltage regulator to get f.eks 3.3V.</SPAN><BR /><SPAN>So 5V will be present first, and 3.3V will be present some time later. </SPAN><BR /><SPAN>The consequence is that you have violated the rule over....!?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Second, does someone know how the protection circuit is implementet on the pin?</SPAN></BODY></HTML> Thu, 16 Jun 2016 03:01:40 GMT lpcware 2016-06-16T03:01:40Z 5V tolerant input https://community.nxp.com/t5/LPCXpresso-IDE/5V-tolerant-input/m-p/534940#M4357 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by 256Doofus on Wed Feb 08 14:36:01 MST 2012</STRONG><BR /><SPAN>Some question around 5V tolerant input on lpc11Cxx.</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>I do remeber that i read in the datasheet that for the input to be 5V tolerant, the powersupply to the µC need to be present. I am not able to find that anymore, so I can not pinpoint that. Can someone verify this?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>If so, normaly you have 5V first, and use a voltage regulator to get f.eks 3.3V.</SPAN><BR /><SPAN>So 5V will be present first, and 3.3V will be present some time later. </SPAN><BR /><SPAN>The consequence is that you have violated the rule over....!?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Second, does someone know how the protection circuit is implementet on the pin?</SPAN></BODY></HTML> Thu, 16 Jun 2016 03:01:40 GMT https://community.nxp.com/t5/LPCXpresso-IDE/5V-tolerant-input/m-p/534940#M4357 lpcware 2016-06-16T03:01:40Z