topic Re: MCF5441x RSTOUT pin Toggles in ColdFire/68K Microcontrollers and Processors https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF5441x-RSTOUT-pin-Toggles/m-p/681492#M13248 <HTML><HEAD></HEAD><BODY><P>I would guess that the CPU is resetting. You should examine "12.3.2 Reset Status Register (RSR)" to find out why.</P><P></P><P>Maybe the Watchdog is enabled and not being serviced?</P><P></P><P>Maybe something is writing to the FRCRSTOUT bit in "12.3.1Reset Control Register (RCR)"?</P><P>Tom</P></BODY></HTML> Sun, 18 Jun 2017 23:25:51 GMT TomE 2017-06-18T23:25:51Z MCF5441x RSTOUT pin Toggles https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF5441x-RSTOUT-pin-Toggles/m-p/681491#M13247 <HTML><HEAD></HEAD><BODY><P>Does anyone have any idea why MCF5441x RSTOUT (pin L16) is toggling after RESET (pin K15) is deasserted? In roughly 10ms (milli-second) cycle time the RSTOUT pin is driven low for about 4us (micro-second).</P><P></P><P>In what situation <SPAN style="font-family: Verdana; color: #000000; font-size: 10pt;">RSTOUT (pin 16; output clock) of MCF54418 may be toggling? </SPAN><SPAN style="font-family: Verdana; color: #000000; font-size: 10pt;">In roughly 10ms (milli-second) cycle time the RSTOUT pin is driven low for about 4us (micro-second).</SPAN></P></BODY></HTML> Fri, 09 Jun 2017 07:39:40 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF5441x-RSTOUT-pin-Toggles/m-p/681491#M13247 davidwong 2017-06-09T07:39:40Z Re: MCF5441x RSTOUT pin Toggles https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF5441x-RSTOUT-pin-Toggles/m-p/681492#M13248 <HTML><HEAD></HEAD><BODY><P>I would guess that the CPU is resetting. You should examine "12.3.2 Reset Status Register (RSR)" to find out why.</P><P></P><P>Maybe the Watchdog is enabled and not being serviced?</P><P></P><P>Maybe something is writing to the FRCRSTOUT bit in "12.3.1Reset Control Register (RCR)"?</P><P>Tom</P></BODY></HTML> Sun, 18 Jun 2017 23:25:51 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF5441x-RSTOUT-pin-Toggles/m-p/681492#M13248 TomE 2017-06-18T23:25:51Z