Invention Grant
- Patent Title: Method and apparatus for authorizing unlocking of a device
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Application No.: US17647744Application Date: 2022-01-12
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Publication No.: US11698974B1Publication Date: 2023-07-11
- Inventor: Minda Zhang , Tolga Nihat Aytek , Thomas Kniplitsch , Axel Dielmann
- Applicant: Marvell Asia Pte, Ltd.
- Applicant Address: SG Singapore
- Assignee: Marvell Asia Pte, Ltd.
- Current Assignee: Marvell Asia Pte, Ltd.
- Current Assignee Address: SG Singapore
- The original application number of the division: US16527302 2019.07.31
- Main IPC: H04L29/06
- IPC: H04L29/06 ; G06F21/57 ; G06F21/44

Abstract:
A programmable integrated circuit device includes a programmable core, a boot device configured to boot up the programmable core, and a one-time programmable memory module controlling life cycle states of the programmable integrated circuit device, including (i) an operational state during which programming resources of the programmable device are locked, and (ii) an inspection state in which the programming resources of the programmable device are accessible. The one-time programmable memory module is configured to allow unidirectional advance from the operational state to the inspection state, when authorized by a lock control circuit responsive to control signals from the boot device to authorize the unidirectional advance from the operational state to the inspection state. Authorization of the unidirectional advance may be limited to a time interval during a boot cycle of the programmable device. The unidirectional advance may be based on receipt of an authenticated request from a requester.
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