ColdFire/68K Microcontrollers and ProcessorsのトピックMCF52259 battery backed up RAM section https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161393#M5129 <HTML><HEAD></HEAD><BODY><P>I read somewhere that half of the internal ram may be preserved with a battery during power down.</P><P>I have searched through my documentation for this but can't find anything.</P><P>Is this true or am I dreaming?</P><P>If so, what half is preserved?</P></BODY></HTML> Wed, 09 May 2012 23:06:48 GMT drummer 2012-05-09T23:06:48Z MCF52259 battery backed up RAM section https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161393#M5129 <HTML><HEAD></HEAD><BODY><P>I read somewhere that half of the internal ram may be preserved with a battery during power down.</P><P>I have searched through my documentation for this but can't find anything.</P><P>Is this true or am I dreaming?</P><P>If so, what half is preserved?</P></BODY></HTML> Wed, 09 May 2012 23:06:48 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161393#M5129 drummer 2012-05-09T23:06:48Z Re: MCF52259 battery backed up RAM section https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161394#M5130 <HTML><HEAD></HEAD><BODY><P>Hi</P><P>&nbsp;</P><P>"Vstby backs up the first 16K of SRAM and the RTC when the main power is shut down".</P><P>&nbsp;</P><P>See <A __default_attr="51895" class="jive_macro jive_macro_thread default_title" href="https://community.freescale.com/thread/51895" jivemacro="thread" title="https://community.freescale.com/thread/51895">https://community.freescale.com/thread/51895</A> and also page 5 of the Data Sheet for the M52259.</P><P>&nbsp;</P><P>Regards</P><P>&nbsp;</P><P>Mark</P><P>&nbsp;</P></BODY></HTML> Thu, 10 May 2012 05:21:58 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161394#M5130 mjbcswitzerland 2012-05-10T05:21:58Z Re: MCF52259 battery backed up RAM section https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161395#M5131 <HTML><HEAD></HEAD><BODY><P>Thanks !</P></BODY></HTML> Wed, 16 May 2012 22:59:31 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/MCF52259-battery-backed-up-RAM-section/m-p/161395#M5131 drummer 2012-05-16T22:59:31Z