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DS2438EVKIT+
REAL-TIME METERS
The Meters Screen displays the latest real-time measurements of battery voltage, temperature, current and
remaining capacity (ICA) with both analog meter readouts and digital values. Also displayed on the Meters Screen
are the values in the Charge Current Accumulator (CCA), Discharge Current Accumulator (DCA), Elapsed Time
Meter, Disconnect (DIS) Timestamp Register, End-of-Charge (EOC) Timestamp Register, and Status Register. The
64-bit ROM ID of the DS2438 is also displayed at the bottom right portion of this screen.
SETTING THE ELAPSED TIME METER
The Elapsed Time Meter (ETM) in the DS2438 is a 32-bit seconds counter that starts counting from zero when a
power supply is connected to the part. The DS2438 EV kit software reads this 32-bit value and formats it into years,
days, hours, minutes, and seconds. To set the ETM, press the Set Elapsed Time button and then enter the
appropriate years, days, hours, minutes and seconds information in the Set Elapsed Time Meter window. The
evaluation kit software reformats this information into a 32-bit binary value and writes that value to the DS2438.
Pressing the Reset button in the Set Elapsed Time Meter window clears ETM fields.
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