Coin Cell Battery Holder B400; Figure 4 - Som Current Sense Header; Table 3 - Power Header J400 Pin-Out - Intrinsyc Open-Q 2500 User Manual

Open-Q™ 2500 Development Kit User Guide
The table below summarizes the pin outs of header J400
Description
SOM power positive current sense line
SOM power negative current sense line
GND
To obtain power consumption measurements, the header is connected to a data acquisition unit (e.g.
Keithley 2701) and the voltages on the SOM_PWR_SENSE_P/N pins are captured every few
seconds over the test period (typically 30 minutes). The SOM power consumption is then calculated
as (where R = 5 milliohms):
sense
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3.7.5 Coin Cell Battery Holder B400

The coin cell holder allows the user to use a coin cell for supplying power to the SOM VCOIN
power input. It is recommended that a Panasonics ML621 series rechargeable coin cell be used (not
supplied with the development kit).

Figure 4 - SOM Current Sense Header

Table 3 - Power Header J400 Pin-out

Signal
SOM_PWR_SENSE_P
SOM_PWR_SENSE_N
GND
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J400[1]
J400[2]
J400[3]
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