ColdFire/68K Microcontrollers and Processors中的主题 Re: mcf52259 internal ram battery backup? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273995#M11813 <HTML><HEAD></HEAD><BODY><P>Open the Reference Manual. Type "Control-F", search for "standby" and the first match will tell you.</P><P></P><P>Tom</P></BODY></HTML> Wed, 27 Feb 2013 00:17:54 GMT TomE 2013-02-27T00:17:54Z mcf52259 internal ram battery backup? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273994#M11812 <HTML><HEAD></HEAD><BODY><P>I know that I read this somewhere but I can't find the reference for it.</P><P>A portion of the internal RAM is made non-volatile through the use of a battery connected to vstby.</P><P>I remember reading it somewhere. Does anyone know if it is the upper half or lower half that is retained?</P><P>Where is the reference for this information?</P><P>I am designing another product that may need to use this feature.</P><P>Thanks.</P></BODY></HTML> Tue, 26 Feb 2013 15:01:54 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273994#M11812 drummer 2013-02-26T15:01:54Z Re: mcf52259 internal ram battery backup? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273995#M11813 <HTML><HEAD></HEAD><BODY><P>Open the Reference Manual. Type "Control-F", search for "standby" and the first match will tell you.</P><P></P><P>Tom</P></BODY></HTML> Wed, 27 Feb 2013 00:17:54 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273995#M11813 TomE 2013-02-27T00:17:54Z Re: mcf52259 internal ram battery backup? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273996#M11814 <HTML><HEAD></HEAD><BODY><P>Thanks I knew I read it somewhere</P><P>• On-chip memories</P><P>— Up to 64-Kbyte dual-ported SRAM on CPU internal bus, supporting core, DMA, and USB</P><P>access with standby power supply support for the first 16 Kbytes</P><P><SPAN class="mce_paste_marker"></SPAN></P><P>.</P></BODY></HTML> Wed, 27 Feb 2013 14:37:17 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/mcf52259-internal-ram-battery-backup/m-p/273996#M11814 drummer 2013-02-27T14:37:17Z