System Power Savings by Automatic Sleep Mode
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
This article describes a technique which conserves microcomputer power by using special low power consumption modes of operation when the computer system is inactive. This is accomplished by inclusion of plural "sleep modes" wherein the system clock is either stopped or operated at a reduced rate, provision of system instructions for in ducing these modes and use of interrupt facilities responsive to external events to return the system to its active "awake mode". The technique disclosed herein takes advantage of the fact that system power in a microcomputer environment is directly proportional to the speed of the system clock. In a battery-powered environment where most logic is complementary metal-oxide-semiconductor (CMOS), this is especially true.