Micro Controller Unit (MCU) Capable of Increasing Data Retention Time and Method of Driving the MCU
AssigneeSamsung Electronics Co., Ltd.
InventorEung Man Kim
Life of this patent
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Abstract
A method of operating a micro controller unit including maintaining a stop mode operation when a battery level detected n response to a first interrupt signal input from an external source is in a predetermined low voltage level range during the stop mode operation, and performing a normal operation corresponding to a second interrupt signal input from the external when a battery voltage level detected in response to the second interrupt signal is higher than the highest voltage level belonging to the predetermined low voltage level range.
Claims14
A method of operating a micro controller unit comprising:
- maintaining a stop mode operation, using the micro controller unit, when a battery level detected in response to a first interrupt signal from an external source is in a predetermined low voltage level range during the stop mode operation;
- and
- performing a normal operation, using the micro controller unit, corresponding to a second interrupt signal from the external source without performing a reset operation, when a battery voltage level detected in response to the second interrupt signal is higher than a highest voltage level belonging to the predetermined low voltage level range.
The method of claim 11 further comprising maintaining the stop mode operation using the micro controller unit when the battery voltage level detected in response to the second interrupt signal is in the predetermined low voltage level range.
A method of operating a micro controller unit, the method comprising:
- detecting a battery voltage level supplied from an external source in response to a first interrupt signal input from the external source;
- performing a stop operation when a detected battery voltage level is in a predetermined voltage level range;
- re-detecting a battery voltage level supplied from the external source in response to a second interrupt signal from the external source, during the stop operation;
- and
- performing a normal operation corresponding to the second interrupt signal when the re-detected battery voltage level is higher than a highest voltage level belonging to the predetermined voltage level range.
A micro controller unit comprising:
- a low voltage detection block detecting a battery voltage level supplied from an external source in response to an interrupt signal and outputting an operation mode control signal on the basis of a detected battery voltage level;
- and
- a reset signal generation unit generating a system reset signal on the basis of the operation mode control signal,
- wherein the low voltage detection block generates the operation mode control signal for disabling the reset signal generation unit, when the detected battery voltage level is in a predetermined voltage level range.
An electronic device comprising:
- a battery power unit supplying a battery voltage;
- and
- a micro controller unit operating using the battery voltage supplied from the battery power unit,
- wherein the micro controller unit comprises:
- a low voltage detection block detecting a battery voltage level supplied from an external source in response to an interrupt signal and outputting an operation mode control signal according to a detected battery voltage level;
- and
- a reset signal generation unit generating a system reset signal according to the operation mode control signal,
- wherein the low voltage detection block generates the operation mode control signal for disabling the reset signal generation unit, when the detected battery voltage level is in a predetermined voltage level range
Dependencies are inferred from the claim text.