Microcomputer selecting operating condition
US7581128B2 · kind B2 · utility
10Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Jun 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microcomputer includes a CPU, a program memory for storing a subroutine program, peripheral circuits, a clock circuit, and a voltage drop detection circuit. When the voltage drop detection circuit detects the voltage drop at the end of a power line, a frequency of a clock signal provided through the clock circuit to the CPU is divided down and a supply of a clock signal provided to the peripheral circuits is stopped. The CPU executes the subroutine program, thereby resuming the supply of the clock signal provided to the peripheral circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.