Rtc Battery - Seco Smarc CSM-B79 User Manual

2.3.2 RTC Battery

For the occurrences when the System (Carrier board + SMARC
holder CN2, for the use of standard coin battery type CR2032 with a nominal capacity of 220mAh, to supply, with a 3V voltage, the Real Time Clock and CMOS
memory mounted on the SMARC ®
The batteries should only be replaced with devices of the same type. Always check the orientation before inserting and make sure that they are aligned correctly and
are not damaged or leaking.
CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.
Never allow the batteries to become short-circuited during handling.
Batteries supplied with CSM-B79 board are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out
of order CSM-B79 board, remove the batteries from the board in order to collect and dispose them according to the requirement of the same European Directive
above mentioned. Even when replacing the batteries, the disposal has to be made according to these requirements.
CN93 position RTC Battery enable
1-2 Battery connected
2-3 Battery disconnected
NO jumper Current measurement
2.3.3 Power In Voltage selector
CN8 position VDD_IN SMARC Voltage
1-2 3.0V
3-4 3.3V
5-6 4.25V
7-8 5V
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
® module) is not powered with an external power supply, on board there is a RTC Coin Cell Battery
module.
It is possible to monitor the consumption on VDD_RTC battery by removing the jumper from CN93
connector and inserting a tester in series set as ammeter between 1-2 position.
RTC battery can be enabled/disabled using dedicated jumper on CN93, which is a
standard pin header, P2.54mm, 1x3 pin.
According to SMARC
5.25V for VDD_IN.
Since the modules could be designed to work only with a fixed voltage value in this range, on CSM-B79 carrier
p/n LE008208-R.
® 2.1.1 specifications, SMARC ® modules allow a power input voltage range of 3.0V to
, type ADIMPEX
19