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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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4513 Fiches technique(PDF) 74 Page - Renesas Technology Corp |
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4513 Fiches technique(HTML) 74 Page - Renesas Technology Corp |
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74 / 210 page  4513/4514 Group User’s Manual HARDWARE 1-61 16 Voltage comparator function When the voltage comparator function is valid with the voltage comparator control register Q3, it is operating even in the RAM back-up mode. Accordingly, be careful about such state because it causes the increase of the operation current in the RAM back- up mode. In order to reduce the operation current in the RAM back-up mode, invalidate (bits 2 and 3 of register Q3 = “0”) the voltage comparator function by software before the POF instruction is ex- ecuted. Also, while the voltage comparator function is valid, current is al- ways consumed by voltage comparator. On the system required for the low-power dissipation, invalidate the voltage comparator when it is unused by software. Register Q3 Bits 0 and 1 of register Q3 can be only read. Note that they can- not be written. Reading the comparison result of voltage comparator Read the voltage comparator comparison result from register Q3 after the voltage comparator response time (max. 20 µs) is passed from the voltage comparator function become valid. 17 18 LIST OF PRECAUTIONS |
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