Rtc Battery; Power Rails Naming Convention - Seco SBC-C90 User Manual

2.3.2

RTC Battery

For the occurrences when the module is not powered with an external power supply, on board there is a cabled coin Lithium Battery to supply, with a 3V voltage,
the Real Time Clock embedded inside the SoC.
Battery used is a cabled CR2032S-LD Lithium coin-cell battery, with a nominal capacity of 220mAh.
Battery connector - CN31
Pin Signal
1 V
RTC
2 GND
CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.
Batteries supplied with SBC-C90 are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out of order
SBC-C90, 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.
2.3.3

Power rails naming convention

In all the tables contained in this manual, Power rails are named with the following meaning:
_RUN: Switched voltages, i.e. power rails that are active only when the board is in ACPI's S0 (Working) state. Examples: +3.3V_RUN, +5V_RUN.
_ALW: Always-on voltages, i.e. power rails that are active both in ACPI's S0 (Working), S3 (Standby) and S5 (Soft Off) state. Examples: +5V_ALW, +3.3V_ALW.
_U: unswitched ACPI S3 voltages, i.e. power rails that are active both in ACPI's S0 (Working) and S3 (Standby) state. Examples: +1.5V_U
Other suffixes are used for application specific power rails, which are derived from same voltage value of voltage switched rails, if it is not differently stated (for
example, +5V is derived from +5V_RUN, and so on).
HDMI
SBC-C90
SBC-C90 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
The battery is not rechargeable and can be connected to the board using dedicated connector CN31 which is a 2-pin
p1.27 mm type HR p/n A1250WRA-S-02PNLNG1G00R or equivalent, with pinout shown in the table on the left.
In case of exhaustion, the battery 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.
Never allow the batteries to become short-circuited during handling.
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