Power on reset circuitry for manufacturability and security using a fuse
AssigneeAltera Corporation
InventorAndy Nguyen
Life of this patent
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Abstract
Methods for controlling a Power On Reset (POR) circuit in an Integrated Circuit (IC) are presented. In one embodiment, a method includes an operation for gating a test POR signal configured to selectively disable an output of a POR circuit, and an operation for programming a fuse. The programming of the fuse includes operations for disabling the signal path of the test POR signal, and for enabling the output of the POR circuit. In another embodiment, the signal path of the test POR signal includes a pass gate, where permanently disabling the signal path is performed by disconnecting the pass gate.
Claims4
A method of operating an Integrated Circuit (IC), the method comprising:
- gating a test power-on-reset (POR) signal configured to selectively disable an output of a POR circuit;
- and
- programming a fuse, the programming of the fuse including,
- disabling a signal path of the test POR signal;
- and
- enabling the output of the POR circuit.
Dependencies are inferred from the claim text.