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US 12,223,101 B2Granted
Hardware-based security authentication
AssigneeTexas Instruments Incorporated
InventorsGregory Allen North, Per Torstein Roine, Eric Thierry Jean Peeters
Life of this patent
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Abstract
A system includes a multiplexer, an input/output (I/O) pin, a logic circuit, and a control register. The multiplexer has multiple inputs, an output, and a selection input. The logic circuit is coupled between the multiplexer and the I/O pin. The logic circuit has a first input. The control register includes first and second bit fields corresponding to the I/O pin. The first bit field is coupled to the selection input of the multiplexer, and the second bit field is coupled to the first input of the logic circuit.
Claims20
A system comprising:
- a first logic circuit including an input and an output;
- a second logic circuit including an input and an output;
- an input/output (I/O) cell circuit including an input coupled to the output of the first logic circuit, wherein the input of the I/O cell circuit is also coupled to the output of the second logic circuit;
- and
- a control register including a first field coupled to the input of the first logic circuit, a second field coupled to the input of the second logic circuit.
2 more elements
A system comprising:
- a first logic circuit including an input and an output;
- a second logic circuit including an input and an output;
- an input/output (I/O) cell circuit including an input coupled to the output of the first logic circuit, wherein the input of the I/O cell circuit is also coupled to the output of the second logic circuit;
- an authenticator;
- and
- a control register including:
- a first field coupled to the input of the first logic circuit and coupled to the authenticator;
- a second field coupled to the input of the second logic circuit and coupled to the authenticator;
- and
- a third field coupled to the I/O cell circuit.
7 more elements
Dependencies are inferred from the claim text.