| 摘要 |
A microcomputer having a sleep mode includes first and second chips received in a single package. The first and second chips are manufactured with different manufacturing processes such that a leak current in the first chip is less than that in the second chip. When a sleep signal for putting the microcomputer in the sleep mode becomes active, data stored in the second chip is transmitted to the first chip. After the data transmission is completed, a power supply voltage supplied to the second chip is stopped and the second chip stops its operation until the sleep mode is released. The data transmission is achieved by digital logic circuits that can be easily redesigned by using a conventional automatic layout generator.
|
