Smart Battery Sm Bus Connector; Coin Cell Battery Holder - Seco CCHPC-C78-C User Manual

Smart Battery SM Bus Connector

Smart Battery SM Bus Connector
Pin Signal Pin
1 SMB_CLK
2 SMB_DAT
+3.3V_ALW
SB_SMB_DAT: Smart Battery System Management bus bidirectional data line, +3.3V_ALW
SMB_ALERT#: System Management Bus Alert, active low input to the module that can be used to generate an Interrupt or to wake the system

Coin cell battery holder

For the occurrences when the System (Carrier board + installed module) is not powered with an external power supply, on board there is a RTC Coin Cell Battery
holder CN9, 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 COM Express module.
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 this product are compliant to requirements of European Directive
2006/66/EC regarding batteries and accumulators. When putting out of order this product, 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.
JP36 position RTC Battery enable
1-2 Battery disconnected
2-3 Battery connected
NO jumper Current measurement
Alternatively, the consumption on VCC_RTC can be monitored by connecting an Ampere meter between pin 1 and 2 of RTC Battery Sense Connector CN5.
CN5 is a dedicated 2 position Wire to Board Terminal Block, type Wurth p/n 691210910002
CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
The SM bus coming from the installed module is carried directly both to the Feature
CN29
header (see par.Errore. L'origine riferimento non è stata trovata.) and to a JST 4-
pin connector CN29, p/n B4B-PH-K-S(LF)(SN), or equivalent, which can be used for
Signal
the connection of external Smart battery controllers. Pinout as indicated in the left
3 SMB_ALERT#
table.
4 GND
SB_SMB_CLK: Smart Battery System Management bus bidirectional clock line,
derived by SMB_CK signal
RTC battery can be enabled/disabled using dedicated jumper on JP36, which is a
standard pin header, P2.54mm, 1x3 pin.
It is possible to monitor the consumption on VCC_RTC battery by removing the jumper from JP36
connector and connecting an Ampere meter to the pins 2-3.
derived by SMB_DAT signal
18