topic I need a sample schematic using the MC9S12DT128. My circuit I designed isn't working. in S12 / MagniV Microcontrollers https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-need-a-sample-schematic-using-the-MC9S12DT128-My-circuit-I/m-p/314737#M10355 <HTML><HEAD></HEAD><BODY><P>I designed a circuit around the MC9S12DT128BMPV. I'm using an external 16MHz clock. When I power up there are some erratic square wave signals on the I/O pins. It seems like it is going through some type of continuous reset. I have the reset line pulled high with a 5K resistor. CW with a Cyclone can't communicate. Any ideas?</P></BODY></HTML> Tue, 01 Jul 2014 20:04:56 GMT gerryhermann 2014-07-01T20:04:56Z I need a sample schematic using the MC9S12DT128. My circuit I designed isn't working. https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-need-a-sample-schematic-using-the-MC9S12DT128-My-circuit-I/m-p/314737#M10355 <HTML><HEAD></HEAD><BODY><P>I designed a circuit around the MC9S12DT128BMPV. I'm using an external 16MHz clock. When I power up there are some erratic square wave signals on the I/O pins. It seems like it is going through some type of continuous reset. I have the reset line pulled high with a 5K resistor. CW with a Cyclone can't communicate. Any ideas?</P></BODY></HTML> Tue, 01 Jul 2014 20:04:56 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-need-a-sample-schematic-using-the-MC9S12DT128-My-circuit-I/m-p/314737#M10355 gerryhermann 2014-07-01T20:04:56Z Re: I need a sample schematic using the MC9S12DT128. My circuit I designed isn't working. https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-need-a-sample-schematic-using-the-MC9S12DT128-My-circuit-I/m-p/314738#M10356 <HTML><HEAD></HEAD><BODY><P>Hi Gerry,</P><P></P><P>I would like to recommend you an app note, the AN2727 Designing Hardware for the HCS12 D-Family:</P><P><A href="http://cache.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf">cache.freescale.com/files/microcontrollers/doc/app_note/AN2727.pdf</A></P><P></P><P>Kindly go through it and check if you have anything different than stated in the app note such as:</P><P>- Power supply connections</P><P>- Control pin connections</P><P>- Oscillator options</P><P>etc.</P><P></P><P>Regards,<BR />iggi</P></BODY></HTML> Wed, 09 Jul 2014 13:01:19 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/I-need-a-sample-schematic-using-the-MC9S12DT128-My-circuit-I/m-p/314738#M10356 iggi 2014-07-09T13:01:19Z