Maxtor CLE12048A Application Note

Application Note:

Interfacing non-standard cameras to Matrox Pulsar

DALSA CL-E1-2048A May 29, 1996

Camera
Interface
Overview

Camera
Interface
Details

• 2048 x 1 x 8-bit

• Digital video output (RS-422)

• External sync required

• 2 modes of operation: fixed line scan rate, variable line scan rate

Mode 1: Fixed line scan rate

Video

Dalsa

CL-E1

• 2048 x 1 x 8-bit

• Digital video output (RS-422)

• DCF configured for 480 lines per virtual frame

• Line scan rate is fixed and is determined by frequency of hsync signal

• Exposure time is inversely proportional to line scan rate

• Continuous video

• Matrox Pulsar sending RS-422 hsync (EXSYNC) and RS-422 pixel clock (MCLK) signals

EXSYNC

MCLK

STROBE

Matrox Pulsar

(with PULSAR/DIG/MOD)

to camera; the hsync signal initiates line readout

• Matrox Pulsar receiving RS-422 pixel clock (STROBE @ 7.159Mhz) signal from camera

• DCF used: CLE1_L.DCF

Mode 2: Variable line scan rate

Video

EXSYNC

Dalsa

CL-E1

MCLK

STROBE

LVAL

Matrox Pulsar

(with PULSAR/DIG/MOD)

optional LCD

electronic

• 2048 x 1 x 8-bit

• Digital video output (RS-422)

• DCF configured for 480 lines per virtual frame

• Line scan rate is variable and is controlled by external trigger signal

• Exposure time is inversely proportional to line scan rate unless an LCD electronic shutter is

shutter

SHUTTER

TTL external trigger

used

• Matrox Pulsar receiving TTL external trigger

• Matrox Pulsar sending RS-422 EXPOSURE2 (EXSYNC) and RS-422 reference clock

(MCLK) signals to camera; the EXPOSURE2 signal initiates line readout

• Matrox Pulsar receiving RS-422 pixel clock (STROBE @ 7.159MHz) and RS-422 vsync

(LVAL) signals from camera

• With optional LCD electronic shutter: Matrox Pulsar sending RS-422 EXPOSURE1 signal

to camera; the EXPOSURE1 signal controls the optional LCD electronic shutter and
therefore the exposure time

• DCF used: CLE1_LS.DCF

• In addition to the DCF, PSG FPGA version 3.01 or newer is required; if this version is not

on your release of the MIL driver for Pulsar, the newest version can be found on the BBS or
at the FTP site

Application Note:

Interfacing non-standard cameras to Matrox Pulsar

DALSA CL-E1-2048A May 29, 1996

Cabling
Requirements

Mode 1: Fixed line scan rate

• PULSAR/DIG/MOD required for digital data, syncs and control signals in RS-422 format

• The connections between the 20-pin dual row connector (labeled OS1) of the camera and

the 68-pin SCSI-2 connector of the PULSAR/DIG/MOD are as follows:

DALSA CL-E1-2048A PULSAR/DIG/MOD
(20-pin dual row connector - OS1) (68-pin SCSI-2 connector)
Pin name Pin no. Pin name Pin no.

D7 1 → DATA7+ 10
D7B 2 → DATA7- 44
D6 3 → DATA6+ 11
D6B 4 → DATA6- 45
D5 5 → DATA5+ 13
D5B 6 → DATA5- 47
D4 7 → DATA4+ 14
D4B 8 → DATA4- 48
D3 9 → DATA3+ 15
D3B 10 → DATA3- 49
D2 11 → DATA2+ 16
D2B 12 → DATA2- 50
D1 13 → DATA1+ 19
D1B 14 → DATA1- 53
D0 15 → DATA0+ 20
D0B 16 → DATA0- 54
STROBE 17 → CLKIN+ 29
STROBEB 18 → CLIKIN- 63

• The connections between the DB-25 connector on the rear panel of the camera and the 68-

pin SCSI-2 connector of the PULSAR/DIG/MOD are as follows:

DALSA CL-E1-2048A PULSAR/DIG/MOD
(DB-25 male connector) (68-pin SCSI-2 connector)
Pin name Pin no. Pin name Pin no.

MCLK 6 ← CLKOUT+ 24
MCLK 19 ← CLKOUT- 58
EXSYNC 17 ← HSYNC+ 26
EXSYNC 4 ← HSYNC- 60
FOR/REV 5 ← CTRL1+ 23
FOR/REV 18 ← CTRL1- 57
GROUND 7 GROUND 1
GROUND 11 GROUND 12
GROUND 20 GROUND 34
GROUND 24 GROUND 35
POWER SUPPLY GROUND GROUND 46
POWER SUPPLY GROUND GROUND 68

NOTE: it is very important that all the GROUNDs of the camera be connected together to

the POWER SUPPLY GROUND, which in turn must be connected to the
GROUND of the Pulsar

PUL-CID-012 2

Application Note:

Interfacing non-standard cameras to Matrox Pulsar

DALSA CL-E1-2048A May 29, 1996

• The connections between the DB-25 connector on the rear panel of the camera and the

power supply are as follows:

DALSA CL-E1-2048A
(DB-25 male connector) POWER SUPPLY
Pin no. Pin name

8 +5V +5V
9 +15V
12 -5V
13 +5V
21 +15V +15V
22 -5V -5V
23 -15V -15V

Mode 2: Variable line scan rate

• IMG-7W2-TO-5BNC cable required for TTL external trigger source and

PULSAR/DIG/MOD required for digital data, syncs and control signals in RS-422 format

• The connections between the 20-pin dual row connector (labeled OS1) of the camera and

the 68-pin SCSI-2 connector of the PULSAR/DIG/MOD are as in Mode 1: fixed line scan
rate with the exception of the following:

DALSA CL-E1-2048A PULSAR/DIG/MOD
(20-pin dual row connector - OS1) (68-pin SCSI-2 connector)
Pin name Pin no. Pin name Pin no.

LVAL 19 → HSYNC+ 26
LVAL 20 → HSYNC- 60

• The connections between the DB-25 connector on the rear panel of the camera and the 68-

pin SCSI-2 connector of the PULSAR/DIG/MOD are as in Mode 1: fixed line scan rate
with the exception of the following:

DALSA CL-E1-2048A PULSAR/DIG/MOD
(DB-25 male connector) (68-pin SCSI-2 connector)
Pin name Pin no. Pin name Pin no.

EXSYNC 17 ← EXPOSURE2+ 28
EXSYNC 4 ← EXPOSURE2- 62
optional LCD elec. shutter BNC+ ← EXPOSURE1+ 30
optional LCD elec. shutter BNC- ← EXPOSURE1- 64

• The connections between the DB-25 connector on the rear panel of the camera and the

power supply are as in Mode 1: fixed line scan rate

• TTL external trigger source should be connected to the TTL Trigger Input of the IMG-

7W2-TO-5BNC cable

PUL-CID-012 3

Application Note:

Interfacing non-standard cameras to Matrox Pulsar

DALSA CL-E1-2048A May 29, 1996

Special
Considerations

Mode 1: Fixed line scan rate

• Matrox Pulsar sends the RS-422 hsync (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 hsync signal. The exposure time is
inversely proportional to the line rate

• 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 2149 pixels; this figure includes the
total number of active (2048) and blanking (101) pixels in one line of data. The clock rate
is 7.159Mhz; the line rate is therefore 3.33Khz. 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 6.88Hz. In each virtual frame

there are 484 lines, 480 of which are active. Both the number of active video lines and the
number of blanking lines can be altered by using Matrox Intellicam to modify the DCF; the
virtual frame rate will be altered accordingly. The number of blanking lines can be reduced
to no less than 1. 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)

Mode 2: Variable line scan rate

• PSG FPGA version 3.01 or newer is required

• The line rate is variable and is controlled by the external trigger signal; the exposure time is

inversely proportional to the line rate

• Once it has received the external signal to trigger, the Pulsar sends the RS-422

EXPOSURE2 (EXSYNC) signal to the camera. The camera awaits the rising edge of the
signal; a short (variable) delay thereafter, the camera sends the RS-422 LVAL signal to the
Pulsar to initiate line readout. The LVAL signal is high for the period during which a line
of data is being read out

• Trigger rate can vary between 0Hz and 0.68Khz

• Virtual frame size is 2048 x 480, with 4 lines of vertical blanking; therefore an effective

480 lines out of every 484 lines are acquired

• With an optional LCD electronic shutter, the exposure time can be controlled independently

of the external trigger signal and is set in the DCF at the hardware register level. A
hardware register editor is provided by running Intellicam with the -hwreg option
(specifically by running INTELCAM -hwreg). An additional menu item, “HW REGISTER
EDITOR”, appears on the main menu screen. The following registers are used to define
exposure timings:

CTRL_SET1CNTL
CTRL_SET1CNTH
CTRL_T1STARTL
CTRL_T1STARTH

PUL-CID-012 4

Application Note:

Interfacing non-standard cameras to Matrox Pulsar

DALSA CL-E1-2048A May 29, 1996

These last are two 16-bit registers that have been split in two: the low byte and the high
byte. To set these registers, note first that CTRL_SET1CNTL must be equal to
CTRL_T1STARTL and that CTRL_SET1CNTH must be equal to CTRL_T1STARTH;
this minimizes the delay between the time the Pulsar receives the external trigger signal and
the time it sends the hsync or EXPOSURE1 signal to the camera. These values must be in
pixels and must be set in hexadecimal; the value of each 16-bit register can vary between 0
(0000 in Hex) and 65 535 (FFFF in Hex). The default width of the EXPOSURE1 pulse for
use of this camera with an optional LCD electronic shutter is 8192 pixels, which in
hexadecimal is 2000; at a clock rate of 7.159mhz, this corresponds to an exposure time of

1.14ms. Here the low byte corresponds to 0H and the high byte to 20H. The registers are
set in the following way:

CTRL_SET1CNTL 0H
CTRL_SET1CNTH 20H
CTRL_T1STARTL 0H
CTRL_T1STARTH 20H

When computing the hardware registers, the following question may be asked: “Some
registers have been manually edited. Ok to overwrite them all? (y/n)”. Answer “no” to this
question and to all questions that follow.

IMPORTANT! Please consult Matrox Imaging Applications at 514-822-6061 before
using Matrox Intellicam in this manner.

• An RS-422 external trigger input may also be used once the following connections between

the 68-pin SCSI-2 connector of the PULSAR/DIG/MOD and the external trigger source are
made:

PULSAR/DIG/MOD External trigger source
(68-pin SCSI-2 connector)
Pin name Pin no. Pin name

TRIGGER+ 27 ← “RS-422 TRIGGER+”
TRIGGER- 61 ← “RS-422 TRIGGER-”

Use Matrox Intellicam in order to modify the DCF for an RS-422 external trigger input.
Consult the Matrox Intellicam User Guide for more information

The DCF(s) mentioned in this application note can be found on the MIL and MIL-Lite CD, or our FTP site (ftp.matrox.com). The information furnished by
Matrox Electronics System, Ltd. is believed to be accurate and reliable. Please verify all interface connections with camera documentation or manual.
Contact your local sales representative or Matrox Sales office or Matrox Imaging Applications at 514-822-6061 for assistance.

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Tel: [phone]
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PUL-CID-012 5