Abstract: An optical measurement system may include a plurality of light sources and a plurality of photosensors, where the photosensors are configured to receive photons from the light sources that are reflected off objects in the surrounding environment. Photons may be stored in memory blocks corresponding to the photosensors to form histograms of the receive photons. A select circuit may be used to share memory blocks between photosensors, such that a plurality of photosensors may write to a single memory block, or a single photosensor may write to a plurality of memory blocks. Sampling clock cycles for the photosensors may be adjusted relative to the clock cycles for the memory blocks based on the select circuit output.