# RTC and RAM backup on RCM4300

**URL:** <https://forums.digi.com/t/rtc-and-ram-backup-on-rcm4300/9405>\
**Category:** Rabbit\
**Created:** [March 14, 2010, 2:57pm UTC](https://forums.digi.com/t/rtc-and-ram-backup-on-rcm4300/9405 "2010-03-14T14:57:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hasran](https://avatars.discourse-cdn.com/v4/letter/h/7ba0ec/32.png) [@hasran](https://forums.digi.com/u/hasran)\
**Post date:** [March 14, 2010, 2:57pm UTC](https://forums.digi.com/t/rtc-and-ram-backup-on-rcm4300/9405/1 "2010-03-14T14:57:27Z")

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Hi all,

I am new to RCM4300. I have been working for few days trying to figure out why my RCM4300 does not backup RTC and RAM even battery is connected?

Any solutions, anyone?

regards

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**Author:** ![Margaret](https://avatars.discourse-cdn.com/v4/letter/m/a88e57/32.png) [@Margaret](https://forums.digi.com/u/Margaret)\
**Post date:** [March 22, 2010, 10:36pm UTC](https://forums.digi.com/t/rtc-and-ram-backup-on-rcm4300/9405/2 "2010-03-22T22:36:18Z")

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Hello, There is a Connection for user-supplied backup battery  
(to support RTC and data SRAM). If you are testing this on the Rabbit dev board, you should be able to run the RTC samples. Take a look at the RCM4300 Users manual, and the samples in the RTCLOCK folder in Dynamic C.