Control chip and system using the same for power saving

摘要

A control chip for power saving is provided. The control chip is configured to operatively receive a first voltage and a first bias voltage. The control chip includes a microcontroller unit and a low power module. The low power module is coupled to the microcontroller unit. The microcontroller unit receives the first voltage to control the operation of at least one component under an operating mode and to stop receiving the first voltage under a power saving mode. The low power module operatively receives the first bias voltage. When the microcontroller unit switches from the operating mode to the power saving mode, the low power module operatively generates a first control signal to cause the microcontroller unit to stop receiving the first voltage. When the low power module detects a trigger signal, the power module operatively generates a second control signal to cause the microcontroller unit to continue receiving the first voltage.

主权项

1. A control chip for power saving, operable to receive a first voltage generated from a switching regulator and a first bias voltage generated from a voltage biasing circuit, the control chip comprising:
a microcontroller unit, operatively receiving the first voltage for controlling the operation of at least one component under an operating mode, and stopping receiving the first voltage under a power saving mode; and a low power module coupled to the microcontroller unit, operatively receiving the first bias voltage; wherein the low power module operatively generates a first control signal to turn off the switching regulator to stop the microcontroller unit from receiving the first voltage when the microcontroller unit has switched from the operating mode to the power saving mode; the low power module operatively generates a second control signal responsive to a trigger signal to turn on the switching regulator to cause the microcontroller unit to continue receiving the first voltage.