EP0310377A2
Expired / Lapsed
EP
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Programmable input/output circuit
Assignee: JFE Steel Corp
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Filing: 1988-09-29
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Granted: —
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Expires: 2008-09-29
Abstract
Abstract In a programmable input/output circuit connected to an input terminal or an output terminal of an integrated circuit, a desirable combination from signals including a signal of the input terminal (1), an input or output signal of a storage element (2, 3, 4), an input or output signal of a combinational logic circuit (15), and input or output signal of another selector and the like is selected by use of at least one programmable selector (6, 7, 8, 9, 10, 11, 12, 14), processed and output into the output terminal (13), so that an input or output circuit for performing a desirable signal process can be provided. Further, at least one dynamic selector circuit (22) is provided, so that an output signal from another input/output circuit can be input into the storage element (2) and an output signal from the storage element (2) can be supplied to another input/output circuit.
Inventors
- 👤 Keiichi C/O Technical Research Division Kawana
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/173; G; G01; G01R; G01R29/00; G01R29/02; G01R29/027; G01R29/0273; H03K19/1733; H03K19/1735; H03K19/1736; H03K5/00; H03K5/125; H03K5/1252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A programmable input/output circuit connected to an input terminal or an output terminal of an integrated circuit, comprising: at least one input terminal (1); at least one storage element (2, 3, 4); at least one combinational logic circuit (5); at least one output terminal (13); and at least one programmable selector (6, 7, 8, 9, 10, 11, 12, 14); wherein: two or more signals from signals including at least a signal from said input terminal, an output signal from said storage element and an output signal from said combinational logic circuit are connected to input terminals of said selector; and an output selected by said selector is connected to any one of output or input terminals including at least an input terminal of said storage element, an input terminal of said combinational logic circuit and said output terminal.
Claim 2
Dependent Claim
138 words
A programmable input/output circuit connected to an input terminal or an output terminal of an integrated circuit, comprising: at least one input terminal (1); at least one storage element (2, 3, 4); at least one combinational logic circuit (5); at least one output terminal (13); and at least one programmable selector (6, 7, 8, 9, 10, 11, 12, 14); wherein: two or more signals from signals including at least a signal from said input terminal, an output signal from said storage element and an output signal from said combinational logic circuit are connected to input terminals of said selector; and an output selected by said selector is connected to any one of output or input terminals including at least an input terminal of said storage element, an input terminal of said combinational logic circuit and said output terminal.
Claim 3
Dependent Claim
36 words
The programmable input/output circuit as set forth in claim 1, wherein said selector (6) selects one signal from signals including a signal of said input terminal (1) and an output signal of said storage element (2).
Claim 4
Dependent Claim
26 words
The programmable input/output circuit as set forth in claim 1, wherein said selector (7, 9, 10) selects one clock signal from a plurality of clock signals.
Claim 5
Dependent Claim
40 words
The programmable input/output circuit as set forth in claim 1, wherein said selector (8) selects one signal from signals including an output signal from said storage element (2) and an output signal from a selector (6) at the former stage.
Claim 6
Dependent Claim
28 words
The programmable input/output circuit as set forth in claim 1, wherein said selector (11) selects one signal from a plurality of output singals from said storage element (2).
Claim 7
Dependent Claim
45 words
The programmable input/output circuit as set forth in claim 1, wherein said selector (14) selects one signal from signals including a signal of said input terminal (1), an output signal of said storage element (2,4) and an output signal of said combinational logic circuit (5).
Claim 8
Dependent Claim
113 words
An input/output circuit connected to an input terminal or an output terminal of an integrated circuit, including: at least one input terminal (1); at least one storage element (2, 3, 4); at least one output terminal (13); at least one programmable selector (6, 7, 8, 9, 10, 11, 12, 14); and at least one dynamic selector circuit (22); wherein: said dynamic selector circuit (22) supplies a signal selected from signals including at least an output signal from another input/output circuit and a signal from said input terminal (1) to an input terminal of said storage element (2); and an output signal from said storage element (2) can be supplied to another input/output circuit.
Claim 9
Dependent Claim
113 words
An input/output circuit connected to an input terminal or an output terminal of an integrated circuit, including: at least one input terminal (1); at least one storage element (2, 3, 4); at least one output terminal (13); at least one programmable selector (6, 7, 8, 9, 10, 11, 12, 14); and at least one dynamic selector circuit (22); wherein: said dynamic selector circuit (22) supplies a signal selected from signals including at least an output signal from another input/output circuit and a signal from said input terminal (1) to an input terminal of said storage element (2); and an output signal from said storage element (2) can be supplied to another input/output circuit.
Claim 10
Dependent Claim
29 words
The programmable input/output circuit as set forth in claim 7, wherein said dynamic selector circuit (22) inputs a selected signal into a storage element (2) at the first stage.
Claim 11
Dependent Claim
24 words
The programmable input/output circuit as set forth in claim 7, wherein said dynamic selector circuit (22) inputs a selected signal into said selector (6).
References Cited (Backward Citations)
No citation records indexed.
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