5 j21 – ser1, 6 battery and power related connectors and jumpers, 1 j22 - battery management connector – Kontron SMARC Evaluation Carrier User Manual
Page 23: J21 – ser1, Battery and power related connectors and jumpers, J22 - battery management connector
User’s Guide
23
5.5.5 J21 – SER1
Connector: JST SM05B-SRSS-TB, 1mm pitch R/A SMD header.
Pin Number
Signal
Notes
1
Serial port 1 – Receive Data
2
Serial port 1 – Transmit Data
3
Not used
4
Not used
5
Ground
5.6
Battery and Power Related Connectors and Jumpers
The SMARC Evaluation Carrier implements a flexible battery connection scheme, allowing single level single cells,
parallel single level cells, two series cells and three series cells.
Caution!
Moving between these combinations requires that the user pay close attention to the battery wiring details
and the battery jumper settings. There are hazards in getting it wrong.
5.6.1 J22 - Battery Management Connector
This connector exists so that key battery management signals are available off-board to allow engineers to prototype
an external battery charger circuit, separate from the charger circuit implemented on the Evaluation Carrier. In most
cases, this connector is not needed and can be ignored.
Connector: Molex 53261-1071, 1.25mm pitch R/A SMD header.
Pin Number
PIN Name
Notes
1
CHARGER_PRSNT#
Charger Present indication from battery
3
CHARGING#
Charging indication from battery
5
BATLOW#
Battery Low indication from battery
7
I2C_PM_CK
I2C Clock
8
I2C_PM_DAT
I2C Data
2,4,10
NC
No Connect
6,9
GND
Ground