Integrated-circuit card with active mode and low power mode

Details Integrated-circuit card with active mode and low power mode Integrated-circuit card with active mode and low power mode

1989-05-04

1992-07-07

Fleming, Michael R.

Boots, shoes, and leggings

3642731, 3649488, 364DIG1, G06F 104

Patent

active

051290910

ABSTRACT:
A semiconductor integrated-circuit card including a microprocessor having an active mode of operation capable of processing data and a low power consumption mode of operation disabled from processing data, the microprocessor being operative to (1) establish the low power consumption mode of operation in the IC card when the microprocessor is initially activated to start operation, (2) make a shift from the low power consumption mode of operation to the active mode of operation responsive to an interrupt signal from an external signal source, and (3) make a shift from the active mode of operation back to the low power consumption mode of operation upon termination of the data processing in the active mode of operation.

REFERENCES:
patent: 4317181 (1982-02-01), Teza et al.
patent: 4361873 (1982-11-01), Harper et al.
patent: 4409665 (1983-10-01), Tubbs
patent: 4698748 (1987-10-01), Juzswik et al.
patent: 4748320 (1988-05-01), Yorimoto et al.
"Hitachi Microcomputer Data Book 8-Bit Single-Chip", pp. 358/390, Feb. 1985.

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