EP0584739A2
Expired / Lapsed
EP
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Semiconductor integrated circuit operative in different modes
Assignee: Toshiba Corp
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Filing: 1993-08-20
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Granted: —
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Expires: 2013-08-20
Abstract
Abstract A semiconductor integrated circuit is operative in a plurality of different modes. A plurality of select signals whose number corresponds to modes selected from a plurality of different modes are outputted. In response to the select signals, it is detected whether at least two operation modes are selected simultaneously. If so, a detection signal is outputted. In response to this detection signal, the operation of the semiconductor integrated circuit is stopped. Further, in response to the select signal, the semiconductor integrated circuit is activated in a mode by means of a predetermined select signal of these select signals. Further, in response to these select signals, the selected mode can be detected.
Inventors
- 👤 Masaru Koyanagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/31701; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0763
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A semiconductor integrated circuit operative in a plurality of different modes, which comprises: means for outputting a plurality of select signals whose number corresponds to modes selected from a plurality of the different modes; means, responsive to the select signals, for detecting whether at least two operation modes are selected simultaneously and outputting a detect signal; and means, responsive to the detect signal, for stopping operation of the semiconductor integrated circuit.
Claim 2
Dependent Claim
60 words
The semiconductor integrated circuit of claim 1, wherein said detect signal outputting means comprises: a plurality of means for NANDing at least two select signals of a plurality of the select signals; and means for NANDing the output signals of a plurality of said NANDing means and outputting the detect signal when at least two operation modes are selected simultaneously.
Claim 3
Dependent Claim
50 words
The semiconductor integrated circuit of claim 1, wherein said operation stopping means comprises gating means for applying signals required for predetermined operation of the semiconductor integrated circuit, to a predetermined circuit in the semiconductor integrated circuit, said gating means stopping the gate function thereof in response to the detect signal.
Claim 4
Dependent Claim
61 words
A semiconductor integrated circuit operative in a plurality of different modes, which comprises: means for outputting a plurality of select signals whose number corresponds to modes selected from a plurality of the different modes; and means, responsive to the select signals, for activating the semiconductor integrated circuit in a mode by means of a predetermined select signal of the select signals.
Claim 5
Dependent Claim
139 words
The semiconductor integrated circuit of claim 4, wherein said activating means applies a specific select signal of a plurality of the select signals as it is, to a predetermined circuit of the semiconductor integrated circuit arranged for the operation mode corresponding to the specific select signal, and includes a plurality of means for NORing the specific select signal and a group of the predetermined number of the select signals of a plurality of the select signals, respectively; and said plural NORing means are connected to predetermined circuits of the semiconductor integrated circuits arranged for the different operation modes, in order to inhibit the select signals other than the specific signal from being applied to the predetermined circuits of the semiconductor integrated circuit arranged for the operation modes corresponding to the select signals, in response to the specific select signal.
Claim 6
Dependent Claim
47 words
A semiconductor integrated circuit operative in a plurality of different modes, which comprises: means for outputting a plurality of select signals whose number corresponds to modes selected from a plurality of the different modes; and means, responsive to the select signals, for detecting which modes are selected.
Claim 7
Dependent Claim
47 words
The semiconductor integrated circuit of claim 6, wherein said detecting means includes switching elements whose number corresponds to a plurality of different operation modes; and the selected modes are detected when said switching elements corresponding to the number of the select signals are turned on or off.
References Cited (Backward Citations)
No citation records indexed.
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