US 12,462,864 B2
Electronic device and operating method thereof
Kyungsoo Lee, Yongin-si (KR); and Yoonjick Lee, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Aug. 4, 2022, as Appl. No. 17/881,208.
Claims priority of application No. 10-2021-0160717 (KR), filed on Nov. 19, 2021.
Prior Publication US 2023/0162779 A1, May 25, 2023
Int. Cl. G11C 11/4074 (2006.01); G11C 7/24 (2006.01); G11C 11/4093 (2006.01); H03L 7/099 (2006.01)
CPC G11C 11/4074 (2013.01) [G11C 7/24 (2013.01); G11C 11/4093 (2013.01); H03L 7/0995 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a nonvolatile memory;
a power management integrated circuit configured to
generate operating power based on supply power received from a power source, and
generate first time information independent of the supply power based on a security timer, the security timer configured to generate the first time information based on a clock source; and
an application processor configured to
receive the operating power,
generate second time information based on a system timer using the operating power, the system timer different from the security timer, the system timer configured to generate the second time information based on the clock source,
obtain, based on generation of the operating power being interrupted, the first time information, and
output, to the nonvolatile memory, time data including the first time information and the second time information, a write command, and an address.