3: Open-Q 845 µSOM Development Kit
Open-Q 845 µSOM Development Kit User Guide
20
Function
DIP
Switch
Description
Notes
use of the ‘fake’ 10K thermistor on the
carrier board.
For battery powered dev kit, set switch
to open / OFF if thermistor is included on
the battery pack. Otherwise keep switch
closed / ON.
BATTERY ID
S301-2
Informs the 845 µSOM whether a valid
battery is connected. The setting is used as
input to enable or disable battery charging.
For DC power dev kit, set switch to
closed / ON (default) to disable battery
charging.
For battery power dev kit, set switch to
open / OFF to enable battery charging.
3.7.3.3
DC Power Input Jack J400 (1)
For a DC powered Open-Q 845 µSOM Development Kit, the DC power input jack J400 (see location in
figure above) is used to connect to the i12V DC power supply. The 845 carrier board includes
circuitry to convert the +12V input into different voltage rails that are needed by 845 µSOM and carrier
board peripherals.
3.7.3.4
Battery Connector J300 (3)
For a battery powered Open-Q 845 µSOM Development Kit, the battery connector J300 (see location in
figure above) is used for connection to the battery. The table below describes the pinout of the battery
connector. For more information on powering the development kit from a battery, including selecting a
battery pack, see reference document R-6.
Table 5. Battery Connector J300 Pinout
Pin No
Signal
Description
1
GND
System ground, Battery Negative Wire
2
GND
System ground, Battery Negative Wire
3
BATT_THERM_CONN
10K Thermistor
4
BATT_ID_CONN
ID Resistor (optional)
5
VBATT_CONN
Battery Positive Wire
6
VBATT_CONN
Battery Positive Wire
3.7.4
SOM Current Sense Header J301 (35)
The SOM Current Sense header, J301, can be used to monitor the SOM’s current consumption on the
main SOM_SYS_PWR power rail. A close up of the J301 (PWR PROBE) location is shown below.
