发明名称 |
Power supply monitoring method and system |
摘要 |
A device having a power supply monitoring capabilities, the device includes: a power supply unit; at least one real time clock generator counter adapted to receive a supply voltage from the power supply unit; a fixed value storage circuit that is un-accessible to software executed by a processor; wherein the fixed value storage circuit stores a fixed value; wherein the fixed value includes multiple bits; a volatile storage unit, being accessible to the processor; wherein the volatile storage unit is adapted to: (i) store a reset value after being reset; (ii) receive the fixed value during an initialization state; and (iii) store the fixed value until being reset; wherein the volatile storage unit is designed such that there is a low probability that the reset value equals the fixed value; and a comparator adapted to provide a tamper indication if the fixed value stored at the fixed value storage circuit differs from a value stored at the volatile storage unit.
|
申请公布号 |
US8245068(B2) |
申请公布日期 |
2012.08.14 |
申请号 |
US20090447395 |
申请日期 |
2009.04.27 |
申请人 |
PRIEL MICHAEL;ASHKENAZI ASAF;KUZMIN DAN;FREESCALE SEMICONDUCTOR, INC. |
发明人 |
PRIEL MICHAEL;ASHKENAZI ASAF;KUZMIN DAN |
分类号 |
G06F1/14;G06F1/30;G06F21/55;G06F21/81 |
主分类号 |
G06F1/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|