Abstract: An electronic system such as an imaging system may include processing circuitry and memory circuitry. Data replacement circuitry may be interposed between the processing circuitry and the memory circuitry. In some implementations, the memory circuitry may be a read-only memory, and data replacement circuitry may be used to selectively replace executable firmware instructions stored on the read-only memory. The selective replacement operations may be based on an address that processing circuitry provides to access the memory circuitry. The data replacement circuitry may be implemented separately from the processing circuitry and the memory circuitry and may include a comparator block, registers, and switching circuitry.

Abstract: A system may include an imaging system coupled to a host subsystem. The imaging system may include an image sensor that provides image frames to the host subsystem. The image sensor may include a data authentication subsystem that appends corresponding authentication data to each of the image frames. Each set of authentication data may be generated based on a subset of the image frame data (e.g., corresponding to image data generated by pixels defined by a sparse region-of-interest within the pixel array). The host subsystem may securely provide region-of-interest parameters to the image sensor to update the sparse region-of-interest in an adaptive manner to account for factors such as computational load of the host subsystem and authentication coverage for the entire pixel array.

Abstract: A system may include an imaging system coupled to a host subsystem. The imaging system may include an image sensor that provides image frames to the host subsystem. The image sensor may include a data authentication subsystem that appends corresponding authentication data to each of the image frames. Each set of authentication data may be generated based on a subset of the image frame data (e.g., corresponding to image data generated by pixels defined by a sparse region-of-interest within the pixel array). The host subsystem may securely provide region-of-interest parameters to the image sensor to update the sparse region-of-interest in an adaptive manner to account for factors such as computational load of the host subsystem and authentication coverage for the entire pixel array.

Abstract: An electronic system such as an imaging system may include processing circuitry and memory circuitry. Data replacement circuitry may be interposed between the processing circuitry and the memory circuitry. In some implementations, the memory circuitry may be a read-only memory, and data replacement circuitry may be used to selectively replace executable firmware instructions stored on the read-only memory. The selective replacement operations may be based on an address that processing circuitry provides to access the memory circuitry. The data replacement circuitry may be implemented separately from the processing circuitry and the memory circuitry and may include a comparator block, registers, and switching circuitry.