Electronic device and information recording method of electronic device
An electronic device includes a power supply circuit, a first counter that counts the number of times that supply of external power to the power supply circuit is stopped, a second counter that is operated by a first power and counts the number of times that generation of the plurality of kinds of power is stopped, a third counter counting the number of times that any of the plurality of kinds of power is dropped to a predetermined voltage or less, a non-volatile first memory storing status information indicating whether or not supply of the external power to the power supply circuit is properly stopped, and a fourth counter that counts the number of times that the supply of the external power to the power supply circuit is properly stopped and the number of times that the supply of the external power to the power supply circuit is abnormally stopped.
1. An electronic device comprising:
a power supply circuit configured to generate a plurality of kinds of powers from an external power;
a first counter configured to count the number of times that supply of the external power to the power supply circuit is stopped;
a second counter configured to be operated by a first power among the plurality of powers and to count the number of times that generation of the plurality of kinds of power is stopped;
a third counter configured to be operated by the first power and to count the number of times that any of the plurality of kinds of power is dropped to a predetermined voltage or less;
a non-volatile first memory storing status information indicating whether or not the supply of the external power to the power supply circuit is properly stopped and indicating whether or not the power supply circuit has properly stopped the generation of the plurality of kinds of power; and
a fourth counter configured to count, based on the status information, the number of times that the supply of the external power to the power supply circuit is properly stopped, and the number of times that the supply of the external power to the power supply circuit is abnormally stopped.
2. The electronic device according to claim 1 , wherein
the first counter is operated by the external power, and
the fourth counter is operated by the plurality of kinds of powers generated by the power supply circuit.
3. The electronic device according to claim 1 , further comprising:
a determination circuit configured to determine, based on a count value of the first counter, a count value of the second counter, a count value of the third counter, a count value of the fourth counter, and the status information, whether a cause of an operation stop of the electronic device is a proper stop of the supply of the external power to the power supply circuit, an improper stop of the supply of the external power to the power supply circuit, a proper stop of power generation of the power supply circuit, or an abnormal stop of power generation of the power supply circuit.
4. The electronic device according to claim 3 , wherein
the first memory further stores the number of times that the supply of the external power to the power supply circuit is properly stopped, the number of times that the supply of the external power to the power supply circuit is improperly stopped, the number of times that the power generation of the power supply circuit is properly stopped, and the number of times that power generation of the power supply circuit is abnormally stopped.
5. The electronic device according to claim 1 , further comprising:
a write circuit configured to write the status information into the first memory when the supply of the external power to the power supply circuit is stopped.
6. The electronic device according to claim 1 , wherein
the electronic device is connected to a host that generates the external power,
the electronic device further comprises a volatile second memory storing data transmitted from the host, and
the electronic device is configured to write the data stored in the second memory into the first memory in response to a shutdown command transmitted from the host, notify the host of write completion, write log data indicating that the shutdown command is received into the first memory, and write the status information indicating whether or not the supply of the external power to the power supply circuit is properly stopped, based on the log data at startup into the first memory.
7. An information recording method of an electronic device including a power supply circuit that generates a plurality of kinds of powers from an external power, the information recording method comprising:
counting the number of times that supply of the external power to the power supply circuit is stopped;
counting the number of times that generation of the plurality of kinds of power is stopped;
counting the number of times that any of the plurality of kinds of power drops to a predetermined voltage or less;
writing status information indicating whether or not the supply of the external power to the power supply circuit is properly stopped and indicating whether or not the power supply circuit has properly stopped generation of the plurality of kinds of power into a first memory; and
counting, based on the status information, the number of times that the supply of the external power to the power supply circuit is properly stopped and the number of times that the supply of the external power to the power supply circuit is abnormally stopped.
8. The information recording method according to claim 7 , further comprising:
determining, based on the number of times that the supply of the external power to the power supply circuit is stopped, the number of times that the generation of the plurality of kinds of power is stopped, the number of times that any of the plurality of kinds of power drops to the predetermined voltage or less, the status information, the number of times that the supply of the external power to the power supply circuit is properly stopped, and the number of times that the supply of the external power to the power supply circuit is abnormally stopped, whether a cause of an operation stop of the electronic device is a proper stop of the supply of the external power to the power supply circuit, an improper stop of the supply of the external power to the power supply circuit, a proper stop of the power generation of the power supply circuit, or an abnormal stop of the power generation of the power supply circuit.
9. The information recording method according to claim 8 , further comprising:
writing the number of times that the supply of the external power to the power supply circuit is properly stopped, the number of times that the supply of the external power to the power supply circuit is improperly stopped, the number of times that the power generation of the power supply circuit is properly stopped, and the number of times that the power generation of the power supply circuit is abnormally stopped into the first memory.
10. The information recording method according to claim 7 , further comprising:
writing the status information into the first memory when the supply of the external power to the power supply circuit is stopped.
11. The information recording method according to claim 7 , wherein
the electronic device is connected to a host that generates the external power, and
the electronic device further comprises a volatile second memory for storing data transmitted from the host, and the method further comprising:
the electronic device writing data stored in the second memory into the first memory in response to a shutdown command transmitted from the host, notifying the host of write completion, writing log data indicating that the shutdown command is received into the first memory, and writing the status information indicating whether or not the supply of the external power to the power supply circuit is properly stopped, based on the log data at startup.