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Active Mode
Here is a chart showing the active mode power advantage of the C8051F9xx family compared to another “low power” MCU. These values are obtained by determining the power consumption as it relates to the frequency sensitivity. The chart is a representation of the power at the rated voltage with values normalized to the highest power consumption. For example, looking at the first MCU with a 2.5V supply and a frequency sensitivity of 305µA/MHz, the power consumed is 763µW/MHz (2.5V * 305µA/MHz). The C8051F9xx devices have an active mode power consumption across the entire operating supply voltage range of 160µA/MHz. As can be seen from the table, all of these factors lead to a much more efficient system, and in this case the poser consumption is cut in half from the initial condition.
PTM Published on: 2011-01-25