S12 / MagniV Microcontrollers中的主题 Re: Need technical support in operating MC9S12XEG128CAL microcontroller at 3.3V voltage level https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Need-technical-support-in-operating-MC9S12XEG128CAL/m-p/656907#M13894 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>Regardless of the voltage level, in simple-chip mode the MCU bus frequency can be set up to 50 MHz and so the performance of the core and peripherals is not affected.</P><P>In expanded mode, however, the maximal internal bus frequency (at 3.3V) is reduced to 25 MHz, as you can see in Table A-30 in the RM.</P><P>Regarding ADC, you can measure in range of 0-5V if VDDA = VRH = 5V and run the MCU at 3.3V (VDDR = VDDX = 3.3V). See Table A-15. ATD Operating Characteristics.</P><P></P><P>Regards</P><P>Daniel</P></BODY></HTML> Thu, 16 Mar 2017 19:37:03 GMT danielmartynek 2017-03-16T19:37:03Z Need technical support in operating MC9S12XEG128CAL microcontroller at 3.3V voltage level https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Need-technical-support-in-operating-MC9S12XEG128CAL/m-p/656906#M13893 <HTML><HEAD></HEAD><BODY><P>Recently we migrated from HC12 (MC912DG128C) microcontroller to HCS12 (MC9S12XEG128CAL).</P><P>Checked the datasheet of MC9S12XEG128CAL controller and found that, this particular controller can also operate at 3.3V voltage level.</P><P>Currently we are using 5V power supply. Planned to migrate to 3.3V.</P><P>Please let me know whether this change will affect performance ?</P></BODY></HTML> Thu, 16 Mar 2017 09:47:14 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Need-technical-support-in-operating-MC9S12XEG128CAL/m-p/656906#M13893 pavithrac 2017-03-16T09:47:14Z Re: Need technical support in operating MC9S12XEG128CAL microcontroller at 3.3V voltage level https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Need-technical-support-in-operating-MC9S12XEG128CAL/m-p/656907#M13894 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>Regardless of the voltage level, in simple-chip mode the MCU bus frequency can be set up to 50 MHz and so the performance of the core and peripherals is not affected.</P><P>In expanded mode, however, the maximal internal bus frequency (at 3.3V) is reduced to 25 MHz, as you can see in Table A-30 in the RM.</P><P>Regarding ADC, you can measure in range of 0-5V if VDDA = VRH = 5V and run the MCU at 3.3V (VDDR = VDDX = 3.3V). See Table A-15. ATD Operating Characteristics.</P><P></P><P>Regards</P><P>Daniel</P></BODY></HTML> Thu, 16 Mar 2017 19:37:03 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Need-technical-support-in-operating-MC9S12XEG128CAL/m-p/656907#M13894 danielmartynek 2017-03-16T19:37:03Z