S12 / MagniV MicrocontrollersのトピックReset pin on MC9S12XEQ pulls down for unknown reason https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Reset-pin-on-MC9S12XEQ-pulls-down-for-unknown-reason/m-p/265985#M9858 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I've started writing code for the MC9S12XEQ.</P><P>The code resets the COP watchdog timer by writing 0x55 and 0xAA, but for unknown reason, the RESET pin pulls down for 1.5 ms every 50 milliseconds.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>This is also happens whenever the debugger stops the MCU (which is logical, but it also happens when the debugger is not connected).</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>How can I keep the RESET pin always up?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you.</P></BODY></HTML> Sun, 14 Apr 2013 17:36:36 GMT programmer 2013-04-14T17:36:36Z Reset pin on MC9S12XEQ pulls down for unknown reason https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Reset-pin-on-MC9S12XEQ-pulls-down-for-unknown-reason/m-p/265985#M9858 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I've started writing code for the MC9S12XEQ.</P><P>The code resets the COP watchdog timer by writing 0x55 and 0xAA, but for unknown reason, the RESET pin pulls down for 1.5 ms every 50 milliseconds.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>This is also happens whenever the debugger stops the MCU (which is logical, but it also happens when the debugger is not connected).</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>How can I keep the RESET pin always up?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you.</P></BODY></HTML> Sun, 14 Apr 2013 17:36:36 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Reset-pin-on-MC9S12XEQ-pulls-down-for-unknown-reason/m-p/265985#M9858 programmer 2013-04-14T17:36:36Z Re: Reset pin on MC9S12XEQ pulls down for unknown reason https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Reset-pin-on-MC9S12XEQ-pulls-down-for-unknown-reason/m-p/265986#M9859 <HTML><HEAD></HEAD><BODY><P>S12XE pulls RESET pin low when internal reset occurs. It could be illegal address reset, COP or clock monitor reset. </P></BODY></HTML> Mon, 15 Apr 2013 11:57:25 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Reset-pin-on-MC9S12XEQ-pulls-down-for-unknown-reason/m-p/265986#M9859 kef 2013-04-15T11:57:25Z