The Current Specification of the integrated RTC of a Intel Atom processor E3800 family is regarding the datasheet defined as follows:
See atom-e3800-family-datasheet.pdf , Rev 1.0, Page 106
Is there a more detailed specification of the typical and the max. current of the RTC? Have someone measured the typical and the max. current of the RTC?
We need a backup battery lifetime of >8 years and with 100uA RTC current a backup battery with 7Ah is needed! This is not acceptable.
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The information that may help you can be found in sections 3.3, 3.2 ,and 5; on page 15, 12, and 19 of the http://www.intel.com/content/dam/doc/application-note/ich-family-real-time-clock-accuracy-considerat... Intel(R) I/O Controller Hub [Intel(R) ICH] / Platform Controller Hub (PCH) Family Real Time Clock (RTC) Electrical, Mechanical, and Thermal Specification (EMTS) - AP-728.
Please let us know if this information is useful to you.
Thank you for your answer. The link to the document of the Intel I/O Controller Hub was useful to understand the RTC in more detail. In the latest revision of the E3800 family datasheet (Rev 3.9) I found this :
A measurement of the RTC_VCC did show a max. value of 2.8uA and with the typical value of 1uA I will do my calculations for the backup battery.
Thanks for you reply.
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