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ETRA SOM/ETRA Hardware/Peripherals/Real Time Clock

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== Real Time Clock ==

''TBD: se è presente un RTC specifico nel prodotto, riportare le ceratteristiche''

''TBD: di seguito un esempio dell'RTC del modulo Bora''

This chapter describes the technical specifications and features for the RTC component on the ETRA module.

=== Features ===

An on-board Maxim Integrated DS3232 device provides a very accurate, temperature-compensated real-time clock (RTC) resource with:
* Temperature-compensated crystal oscillator
* Date, time and calendar
* Alarm capability
* Backup power from external battery
* ±3.5ppm accuracy from -40°C to +85°C
* 236 Bytes of Battery-Backed SRAM
* I²C Interface
Backup power is provided through the RTC_VBAT signal:

* on Bora it is connected to J2.113
* on Bora Lite it is connected to J1.22

If not used, RTC_VBAT must be externally connected to GND. For a detailed description of RTC characteristics, please refer to the DS3232 datasheet.

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[[Category:ETRA]]
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