The PL-D732/734 series are global shutter cameras that allow overlapped exposure of one frame while reading out another. Thus, the maximum frame rate is determined by the greater of the exposure time or readout time, plus some frame overhead time. Readout of frame N must be complete just before exposure of frame N+1 is complete, at which point frame N+1 is “transferred” to the readout nodes in the sensor. This transfer is known as the Frame Overhead Time (FOT).
The maxFrameRate can be calculated as follows:
maxFrameRate = 1/minFrameTime minFrameTime = FOT + MAX(readoutTime, exposureTime) The readoutTime of the PL-D732/734 series can be calculated as follows: readOutTime = rowTime * (height /decimation) Where: rowTime = (maxwidth / decimation) * clkPeriod / numLVDStaps + rowOverheadTime height – the ROI height chosen maxwidth – 2048 decimation – the amount of vertical DECIMATION being applied at the sensor (default is 1 for no decimation) numLVDStaps – 8 clkPeriod = 1 / 48.0 MHz rowOverheadTime = 2 * clkPeriod