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Power Considerations
8.1.3Battery Life Calculations
The following table shows the times spent in each state by the RDK keyboard usage model. By sub- stituting the current measurements in section Current Measurements on page 107, the overall aver- age Icc for RDK keyboard can be calculated.
Table
| Mode | Hrs/day | Days | Average Icc (mA) | Charge (mAh) | |
Week day | Active | 4 | 5 | 0.89 | 17.8 | |
Idle | 20 | 5 | 0.04 | 4 | ||
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Weekend | Idle | 24 | 2 | 0.04 | 1.92 | |
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Charge Per Week (mAh) |
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| 23.72 | ||
Overall Average Icc (mA) |
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| 0.141 |
The RDK keyboard uses two AA battery cells and enables the PMU function. Therefore, it is able to access approximately a
8.2RDK Mouse
8.2.1Usage Model
The following usage model are considered for the RDK mouse.
■1 hour per day with the 3030/3040 sensor in ‘active’ state.
■2 hours per day with the 3030/3040 sensor in ‘rest1’ state.
■2 hours per day with the 3030/3040 sensor in ‘rest2’ state.
■19 hours per day with the 3030/3040 sensor in ‘rest3’ state.
■5 days per week as above, 2 days per week 24 hours in ‘rest3’ state.
108 | CY4672 Reference Design Guide, Document # |
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