Structures and control processes for efficient generation of different test clocking sequences, controls and other test signals in scan designs with multiple partitions, and devices, systems and processes of making
First Claim
1. A scannable integrated circuit comprising:
- a functional integrated circuit having scan chains;
multiple scan decompressors, each operable to supply scan bits to some of the scan chains;
a shared scan-programmable control circuit;
a tree circuit coupled with the functional integrated circuit, the shared scan-programmable control circuit coupled to control the tree circuit; and
a selective coupling circuit operable to provide selective coupling with said shared scan-programmable control circuit for scan programming through any of said multiple scan decompressors.
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Accused Products
Abstract
A scannable integrated circuit (100) including a functional integrated circuit (P1, P2) having scan chains, multiple scan decompressors (120.1, 120.2), each operable to supply scan bits to some of the scan chains (101.k, 102.k), a shared scan-programmable control circuit (110, 300), a tree circuit (400) coupled with the functional integrated circuit (P1, P2), the shared scan-programmable control circuit (110, 300) coupled to control the tree circuit (400), and a selective coupling circuit (180) operable to provide selective coupling with the shared scan-programmable control circuit (110, 300) for scan programming through any of the multiple scan decompressors (120.1, 120.2). Other circuits, devices, systems, and processes of operation and manufacture are disclosed.
35 Citations
46 Claims
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1. A scannable integrated circuit comprising:
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a functional integrated circuit having scan chains; multiple scan decompressors, each operable to supply scan bits to some of the scan chains; a shared scan-programmable control circuit; a tree circuit coupled with the functional integrated circuit, the shared scan-programmable control circuit coupled to control the tree circuit; and a selective coupling circuit operable to provide selective coupling with said shared scan-programmable control circuit for scan programming through any of said multiple scan decompressors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A process for utilizing a plurality of test patterns in an integrated circuit having multiple partitions and scan chains therein, the process comprising:
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decompressing such test patterns to provide decompressed test patterns; partition-specifically supplying bits to a plurality of the partitions via scan-in of the scan chains therein using parts of the decompressed test patterns; and routing in at least another part of the decompressed test patterns as programming bits to a shared control circuit, regardless of which test pattern in the plurality, to control a tree circuit that is coupled to the plurality of the partitions. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A process of manufacturing an integrated circuit comprising using fabrication equipment to make an integrated circuit having functional circuitry with scan chains, multiple scan decompressors each operable to supply scan bits to some of the scan chains, a shared scan-programmable control circuit, a tree circuit coupled with the functional circuitry, the control circuit coupled to control the tree circuit, and a selective coupling circuit operable to provide coupling of said shared scan-programmable control circuit for scan programming through any selected one of said multiple scan decompressors.
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46. A telecommunications device comprising:
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a printed circuit board; a first integrated circuit having functional circuitry with scan chains, multiple scan decompressors each operable to supply scan bits to some of the scan chains, a shared scan-programmable control circuit, a tree circuit coupled with the functional circuitry, the control circuit coupled to control the tree circuit, and a selective coupling circuit operable to provide coupling of said shared scan-programmable control circuit for scan programming through any selected one of said multiple scan decompressors; and a modem integrated circuit electrically coupled with said first integrated circuit and to said printed circuit board.
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Specification