Tiered Access to On Chip Features
First Claim
1. An apparatus comprising:
- a fuse array; and
a controller to limit access to said fuse array, said controller to provide at least two tiers of access, to different information, each tier requiring a different password.
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Accused Products
Abstract
In accordance with some embodiments, multiple blind debug passwords are provided. Each of a plurality of interested entities may have its own password and each password may unlock a specific set of features offered by an integrated circuit. In some embodiments each entity does not know the other passwords of the other entities. Potentially interested entities include an integrated circuit end customer, the original equipment manufacturer, the entity that provided the features to the integrated circuit and a conditional access provider. All debug features may be controlled solely via access to the debug tiers which are accessed by multiple debug passwords. Lower tier passwords are required in order to access higher tiers. Debug features may be separated into multiple tiers with more intrusive access requiring multiple debug passwords in order to gain access.
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Citations
27 Claims
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1. An apparatus comprising:
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a fuse array; and a controller to limit access to said fuse array, said controller to provide at least two tiers of access, to different information, each tier requiring a different password. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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providing at least two tiers of access to a fuse array, each tier storing different information; and requiring a different password for each tier. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. One or more non-transitory computer readable media storing instructions executed by a processor to perform a sequence comprising:
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providing at least two tiers of access to a fuse array, each tier storing different information; and requiring a different password for each tier. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification