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EP0349726A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Integrated-circuit card with a low power consumption mode

Assignee: Toppan Inc
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Filing: 1989-05-05
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Granted: —
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Expires: 2009-05-05
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Abstract

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.

Inventors

  • 👤 Yoshikazu C/O Toppan Printer Co.Ltd. Yorimoto
  • 👤 Masashi C/O Toppan Printer Co.Ltd. Takahashi
  • 👤 Seiji C/O Toppan Printer Co.Ltd. Hirano

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 10:12
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3206; G06F1/3215; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 154 words
A semiconductor integrated-circuit card including a data processing means having an active mode of operation capable of processing data and a low power consumption mode of operation disabled from processing data, said data processing means being characterized by a) first mode shift means responsive to activation of said data processing means for establishing said low power consumption mode of operation in the IC card when the data processing means is initially activated to start operation, b) second mode shift means responsive to an interrupt signal from an external signal source for making a shift from said low power consumption mode of operation to said active mode of operation and enabling said data processing means to process data, and c) third mode shift means for making a shift from said active mode of operation back to said low power consumption mode of operation upon termination of the data processing in said active mode of operation.

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