Time of flight sensing unit having reconfigurable or logic

An electronic device, comprising:

• a time of flight sensing unit comprising:
• a ranging laser configured to emit ranging light toward a scene;
• a reflected light detector configured to detect ranging light that has reflected from the scene, wherein the reflected light detector comprises:
• a plurality of photodetection regions, each photodetection region being comprised of a plurality of macropixels arranged into an array, each macropixel comprising:
• an array of photodiodes;
• and
• OR logic circuitry configured to receive outputs of the array of photodiodes as input, and generate a detection signal as a function of a logic OR operation between the outputs of the array of photodiodes;
• and
• wherein each macropixel has associated therewith:
• output combining logic;
• and
• selection circuitry comprising:
• horizontal selection circuitry configured to selectively pass the detection signal to the output combining logic or to output combining logic of at least one horizontally neighboring macropixel of the plurality thereof;
• and
• vertical selection circuitry configured to selectively pass the detection signal to the output combining logic or to output combining logic of at least one vertically neighboring macropixel of the plurality thereof;
• wherein the output combining logic comprises:
• horizontal combining logic having inputs coupled to the selection circuitry and to the selection circuitry of the at least one horizontally neighboring macropixel, and being configured to generate an output detection signal as a function of logically combining outputs of the selection circuitry and the selection circuitry of the at least one horizontally neighboring macropixel;
• and
• vertical combining logic having inputs coupled to the selection circuitry and to the selection circuitry of the at least one vertically neighboring macropixel, and being configured to generate an output detection signal as a function of logically combining outputs of the selection circuitry and the selection circuitry of the at least one vertically neighboring macropixel;
• and
• timing circuitry configured to determine distances to various points of the scene based upon elapsed time between emitting of the ranging light and detection of the ranging light that has reflected from the scene by the plurality of photodetection regions.