| 摘要 |
<p>The present invention teaches a system having reduced quiescent current drawn from a power supply. The system comprises a device having a status. Moreover, the system comprises a microcontroller, having an active and a sleep mode of operation, for polling the status of the device during the active mode, initiating a function in response to a change in the status during the active mode, and for conserving quiescent current drawn from the power supply during the sleep mode. According to the present invention, the microcontroller generates an output signal at a first voltage level during the active mode and generates the output signal at a second voltage level during the sleep mode. The microcontroller, additionally, comprises a sensor for switching the microcontroller from the sleep mode to the active mode. Furthermore, the system comprises a storage device for charging to the first voltage level during the active mode, and for discharging to a third voltage level during the sleep mode for triggering the sensor to switch from the sleep mode to the active mode.</p> |
