BARCODE READING DEVICE THAT CONTROLS ILLUMINATION WITHOUT SIGNALING FROM AN IMAGE SENSOR

A barcode reading device includes an image sensor comprising a photosensor array and control circuitry configured to control an exposure period for the photosensor array. The barcode reading device also includes one or more illumination sources configured to generate illumination for illuminating a target area. The barcode reading device also includes circuitry that is configured to read out image data from the photosensor array in response to a trigger signal. The circuitry is also configured to, independent of controlling the exposure period for the photosensor array, illuminate a target area by activating the one or more illumination sources in response to the trigger signal.