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RIALTO SBC/Interfaces and Connectors/RTC

2,101 bytes added, 12 January
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== RTC ==

=== Description ===

RIALTO SBC uses an external I2C RTC device, i.e. M41T83SQA6F.

An external lithium battery (like Panasonic [https://industrial.panasonic.com/ww/products/batteries/secondary-batteries/coin_rechargeable_lithium/models/ML2020 ML-1220/V1AN] rechargeable battery) can be optionally mounted on RIALTO SBC.


[[File:RIALTO_SBC-Battery-connector.png|thumb|center| 500px|RTC Lithium battery]]

===Signals ===

The following table describes the interface signals:

{| class="wikitable"
! latexfontsize="scriptsize"| Pin#
! latexfontsize="scriptsize"| Pin name
! latexfontsize="scriptsize"| Pin function
! latexfontsize="scriptsize"| Pin Notes
|-
| 1 || RTC_LICELL || VBAT || coin cell battery network has to be properly configured for lithium battery recharge current
|-
| 2 || GND|| Ground ||
|}

=== Device mapping ===
RTC is mapped to <code>/dev/rtc0</code> device in Linux.

=== Device usage ===

The peripheral can be accessed through the <code>date</code> and <code>hwclock</code> linux commands.

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[[Category:RIALTO SBC]]
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