Hand Held Products IT4000 Integration Manual

Contents

Hand Held Products IT4000 Integration Manual Manual pdf 20 page image

2 - 10 IMAGETEAM™ 4X00 Series Integration ManualFTO FIFO time-out. 1=Time-out occurred.FDAV_[2:0] FIFO Channel X data received 1=Received data available for respective channel.FEMPTY_[2:0] FIFO Channel X empty. 1=Respective channel.EOL End Of Line. 1=End of line detected.PAR_ERR Parity Error in serial sync string. 1=Parity error detected.CQD Camera Interface Quick Disable. 1=Capture interface has been quick disabled.CDD Camera Interface Disable Done. 1=Capture interface has been disabled and active video frame is complete.SOF Start Of Frame. 1=Capture interface has detected the start of a frame.EOF End Of Frame. 1=Capture interface has detected the end of a frame.IFO[2:0] FIFO overrun in corresponding channel. 1=Respective FIFO channel overrun detected.d Dynamic value that changes as needed for image capture control.FLVL[2:0] FIFO level 0, 1, and 2 can be set to buffer 0 to 128, 0 to 64, and 0 to 64 bytes, respectivelyTHL_0 Threshold Level for FIFO channel 0 (DMA requests are generated when this value is reached). 00-32 bytes; 01-64bytes; 10-96 bytes; 11 - reserved.RESET_F Reset input FIFO. 0=no effect; 1=all input FIFOs (and this bit) are cleared.FEN[2:0] FIFO enable 0, 1, and 2. 0=corresponding FIFO disabled; 1=corresponding FIFO enabled.Illumination/Aimer ControlThere are two primary methods of controlling the total power draw of the illumination and aiming systems: reducing the power,or pulsing the Illumination On or Aimer On control signals.Note: Reducing the current/power also reduces the intensity of the illumination. This reduction in light levels directly impacts thereading attributes of the image module. A reduction in light levels reduces reading distance to target and DOFperformance.Aimer LEDs are typically not on for prolonged periods of time, therefore a power savings may not be seen by pulsing the AimerOn control signal.Pulsing the Illumination On signal can create a large reduction because the illumination LEDs are on during the entire frame time(24 ms to 33 ms). The control linemust be pulsed at a rate that is less than the line rate so the LEDs are flashed on and off manytimes per line, and for the same number of times each line. If this is not done, light and dark bands appear throughout the image,reducing reading and image taking performance.Aimer ModesInterleaved ModeInterleaved Mode is characterized by the illumination LEDs and aiming LEDs/Laser being turned on alternately, or in aninterleaved fashion (illumination on, aimer off/illumination off, aimer on). In this mode, the aimer flashes on and off. InterleavedMode is the most efficient for power conservation and heat reduction.CISR - Capture Interface Status Register (clear these flags by writing a one to the corresponding bit)bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0Setting X X X X X X X X X X X X X X X X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0ReservedFTORDAV_2RDAV_1RDAV_0FEMPTY_2FEMPTY_1FEMPTY_0EOLPAR_ERRCQDCDDSOFEOFIFO_2IFO_1IFO_0CIFR - Capture Interface FIFO Control Registerbit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0Setting X X 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 X X 0 1 d 0 0 1ReservedFLVL2 FLVL1 FLVL0ReservedTHL_0RESETFFEN2FEN1FEN0