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CY4672 Reference Design Guide, Document # 001-16968 Revision ** 109
Power Considerations
8.2.2 Current Measurements
The following is the results of RDK mouse current measurement:
8.2.3 Battery Life Calculations
The following table shows the times spent in each state by the RDK mouse usage model. By substi-
tuting the current measurements in section Current Measurements, the overall average Icc for RDK
mouse can be calculated.
The RDK mouse uses two AA battery cells and enables the PMU function. Therefore, it is able to
access approximately a 2850-mAh battery capacity, which yields a battery life estimate of 292 days.
Table 8-3. RDK keyboard Power Consumption
Operation Mode
Icc (mA) with
Supply Voltage =
2.5V
Icc (mA) with
Supply Voltage =
2.8V
Average Icc
(mA)
Active mode–Move the mouse in a circle on white
paper.
86.97.5
Rest1 mode–Allow the mouse to sit idle for 1 sec-
ond after being in the active state.
2.03 1.81 1.92
Rest2 mode–Allow the mouse to sit idle for 10 sec-
onds after being in the active state.
0.16 0.15 0.16
Rest3 mode–Allow the mouse to sit idle for 10 min-
utes after being in the active state.
0.071 0.070 0.071
Not connected mode–Briefcase Mode. 0.05 0.04 0.05
Table 8-4. RDK Mouse Power Consumption
Mode Hrs/day Days Average Icc (mA) Charge (mAh)
Week day
Active 1 5 7.5 37.5
Rest1 2 5 1.92 19.2
Rest2 2 5 0.16 1.6
Rest3 19 5 0.07 6.65
Weekend Rest3 24 2 0.07 3.36
Charge Per Week (mAh) 68.3
Overall Average Icc (mA) 0.407
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