S12 / MagniV MicrocontrollersのトピックSimple question! - MC9S12XEP100 https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-question-MC9S12XEP100/m-p/210431#M8700 <HTML><HEAD></HEAD><BODY><P>I just would like to know how fast the system clock is in default setting. Since the crystal oscillator providing frequency to board is only 4MHZ, i just wonder whether real system clock is 4MHZ.</P><P>And if it is, anyone know how can use more than 4MHZ, may be 16MHZ clock speed?</P></BODY></HTML> Sat, 28 May 2011 13:34:10 GMT kayji 2011-05-28T13:34:10Z Simple question! - MC9S12XEP100 https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-question-MC9S12XEP100/m-p/210431#M8700 <HTML><HEAD></HEAD><BODY><P>I just would like to know how fast the system clock is in default setting. Since the crystal oscillator providing frequency to board is only 4MHZ, i just wonder whether real system clock is 4MHZ.</P><P>And if it is, anyone know how can use more than 4MHZ, may be 16MHZ clock speed?</P></BODY></HTML> Sat, 28 May 2011 13:34:10 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-question-MC9S12XEP100/m-p/210431#M8700 kayji 2011-05-28T13:34:10Z Re: Simple question! - MC9S12XEP100 https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-question-MC9S12XEP100/m-p/210432#M8701 <HTML><HEAD></HEAD><BODY><P>hi dear,</P><P>&nbsp;</P><P>If your board has a 4MHz crystal then the bus /clock speed will be 2MHz (for XEP100). If you want 16MHz&nbsp; clock speed with the same 4MHz crystal , you may use PLL for your application.</P></BODY></HTML> Mon, 27 Jun 2011 17:41:49 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-question-MC9S12XEP100/m-p/210432#M8701 vishaka_maithil 2011-06-27T17:41:49Z