Maxtor CLC31024N Application Note
Application Note:
Interfacing non-standard cameras to Matrox Pulsar
DALSA CL-C3-1024N June 11, 1997
Camera
Descriptions
Interface Modes
Camera
Interface
Briefs
• 1024 x 1 x 8-bit
• 1 channel digital video output (RS-422)
• Max. data rate is 20MHz
• External sync required
• Exposure control
• Fixed line scan rate and variable line scan rate
Mode 1: Fixed line scan rate
DALSA
CL-C3-1024N
• 1024 x 1 x 8-bit
• Digital video output (RS-422).
• DCF configured for 512 lines per virtual frame.
• Line scan rate is fixed and is determined by frequency of EXSYNC signal.
• Matrox Pulsar sending RS-422 EXPOSURE1 (PRIN), RS-422 EXPOSURE2 (EXSYNC)
Video
PRIN
EXSYNC
MCLK
STROBE
LVAL
Matrox Pulsar
(with PULSAR/DIG/MOD)
and RS-422 Reference clock (MCLK) signals to camera; the EXPOSURE1 and
EXPOSURE2 signals control the exposure time and initiates line readout.
• Matrox Pulsar receiving RS-422 pixel clock (STROBE @ 15 MHz) and RS-422 VSYNC
(LVAL) signals from camera; the LVAL signal indicates valid lines (pixels).
• DCF used: CLC3NDEL.DCF
Mode 2: Variable line scan rate
DALSA
CL-C3-1024N
• 1024 x 1 x 8-bit
• 1 channel digital video output (RS-422).
• DCF configured for 512 lines per virtual frame.
• Line scan rate is variable and is controlled by external trigger signal
• Matrox Pulsar receiving TTL external trigger.
• Matrox Pulsar sending RS-422 EXPOSURE1 (PRIN), RS-422 EXPOSURE2 (EXSYNC)
Video
PRIN
EXSYNC
MCLK
STROBE
LVAL
TTL external trigger
Matrox Pulsar
(with PULSAR/DIG/MOD)
and RS-422 reference clock (MCLK) signals to camera; the EXPOSURE1 and
EXPOSURE2 signals control the exposure time and initiates line readout.
• Matrox Pulsar receiving RS-422 pixel clock (STROBE @ 15 MHz) and RS-422 vsync
(LVAL) signals from camera; the LVAL signal indicates valid lines (pixels).
• DCF used: CLC3NDAL.DCF
Application Note:
Interfacing non-standard cameras to Matrox Pulsar
DALSA CL-C3-1024N June 11, 1997
Camera
Interface
Details
Mode 1: Fixed line scan rate
• The Matrox Pulsar sends the RS-422 EXPOSURE1 (EXSYNC) signal to the camera; the
camera awaits the rising edge of the signal and after a short (constant) delay initiates line
readout. The line rate is fixed and is determined by the frequency of the EXSYNC signal.
• The HSYNC parameter in the DCF specifies the line rate of the camera and therefore the
exposure time. The total line time is currently set to 1045 pixels. The clock rate is 15 Mhz;
the line rate is therefore 3.5KHz. The line rate of the camera, and therefore the exposure
time, can be modified in the DCF using Matrox Intellicam. Consult the Matrox Intellicam
User Guide for more information.
• The virtual frame rate for the current settings of the DCF is 287µs x 512 = 146.9µs =
6.8Hz. In each virtual frame there are 512 active lines. The host buffer of the Matrox
Pulsar can grab images of up to 2048 x 2048 (4MB) and the display buffer can grab
images of up to 2048 x 1024 (2MB)
• The time between the rising edge of the EXPOSURE1 and EXPOSURE2 signals is the
exposure time. In order to select the exposure time, the width and deployment time of each
EXPOSURE 1 and EXPOSURE 2 must be set in Matrox Intellicam.
T1
287µµs
EXPOSURE 1 (PRIN)
EXPOSURE 2 (EXSYNC)
286µµs
T2
200µµs
534ns
PUL-CID-041
68.27µµs
HSYNC (LVAL)
Line rate
287
1
µ=s
KHz3.5
=
Mode 2: Variable line scan rate
• PSG FPGA version 3.01 or newer is required.
• Line rate is variable and is controlled by the external trigger signal.
• Virtual frame size for this DCF is 1024 x 1 x 512
• Once it has received the external signal to trigger, the Matrox Pulsar sends the RS-422
EXPOSURE1 (PRIN) signal to the camera to initiate exposure. The Matrox Pulsar will
send the RS-422 EXPOSURE2 (EXSYNC) signal to the camera following a delay that is
equal to the desired exposure time. A short (variable) delay after receiving the
EXPOSURE2 pulse, the camera sends the RS-422 LVAL signal to the Matrox Pulsar to
indicate line readout (line valid).
2
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