S12 / MagniV MicrocontrollersのトピックRe: I/O Pin protection https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-O-Pin-protection/m-p/127793#M763 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;A good resource is AN2727 which talks about good hardware practice. <A href="http://www.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf" rel="nofollow" target="_blank">http://www.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf</A></DIV><DIV>&nbsp;If you 'exceed' VDD or GND then you will create injection currents for which there are specs and these are also discussed in the app note.</DIV></BODY></HTML> Fri, 03 Mar 2006 01:31:04 GMT Steve 2006-03-03T01:31:04Z I/O Pin protection https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-O-Pin-protection/m-p/127792#M762 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I have a question about the I/O pin protection og HCS12 microcontrollers. I am designing additional board which will be used along the CARDS12 board from elektronikladen, and I want to make some interface circuit for I/O pins protection.</SPAN><BR /><SPAN>Does anybody know that HCS12 I/O pins are already protected by diodes (connected to GND and VCC) for protection against overvoltage?</SPAN><BR /><BR /><SPAN>Thanks for any answer,</SPAN></BODY></HTML> Thu, 02 Mar 2006 21:37:21 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-O-Pin-protection/m-p/127792#M762 LBdgWgt 2006-03-02T21:37:21Z Re: I/O Pin protection https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-O-Pin-protection/m-p/127793#M763 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;A good resource is AN2727 which talks about good hardware practice. <A href="http://www.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf" rel="nofollow" target="_blank">http://www.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf</A></DIV><DIV>&nbsp;If you 'exceed' VDD or GND then you will create injection currents for which there are specs and these are also discussed in the app note.</DIV></BODY></HTML> Fri, 03 Mar 2006 01:31:04 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-O-Pin-protection/m-p/127793#M763 Steve 2006-03-03T01:31:04Z