Dalsa 1M28-SA User Manual page 45

1M28, 1M75, and 1M150 User's Manual
Register address 13 - MODE3_REG
Bit
4
5
6
7
Table 20: Mode Register 4 (Register address REGADDR = 14D = 0EH)
Register address 14 - MODE4_REG
Bit
0
1 to 7
Bits 1 to 3 in mode register 3 determine the trigger modes in Slave mode (when using an
EXSYNC). To activate the trigger modes, you have to set bit 0 = 1 in mode register 2. You can
only select of the two trigger modes. If the slave modes are not activated when the camera is using
an EXSYNC, registers 15-17 determine the camera's exposure time. See the next section for
details on registers 15-17.
Bit 4 in mode register 3 activates the signal SHUTTER. With the Camera Link interface, this bit is
deactivated so that DVAL=1, corresponding to the Camera Link standard.
Bit 5 in mode register 3 activates the preload of line addresses, minimizing the line delay and
allowing very high frame rates to be achieved. Be aware that preloading line addresses in the
middle of a line limits where you can place a region of interest. To circumvent this limitation, you
need to deactivate the preload and increase the line delay register 32 to a value greater than 32.
Registers 15-17 (Exposure Time)
The exposure time is stored in three (15 – 17) 8 bit registers (24 bits total).
The exposure time is set in increments of the pixel clock. For the 1M28, each increment is 35ns;
for the 1M75, each increment is 50ns; and for the 1M150, each increment is 25ns. The final
exposure time can be calculated by changing the stored binary value to a decimal value and
multiplying by the time of the appropriate increment for your camera.
Registers 18-20 (LinLog2)
The LinLog2 time constant is implemented as a 24 bit register (registers 18-20), similar to the
exposure time. The LinLog2 time constant must always be smaller than the exposure time.
Registers 21-23 (Frame Time)
The frame time is set by registers 21-23. This value is set in increments of the pixel clock (35ns for
1M28, 50ns for 1M75, and 25ns for 1M150). The frame time is used to keep the frame rate
constant, independent of the exposure time.
time. Invalid values must be prevented via software.
DALSA
PRELIMINARY
Name
OSURE
EN_SHUTTER
EN_PRELOAD
EN_LINE_RESET
Not Used
Name
SLAVE_ACTIVE
Not used
Description
edge EXSYNC Signal = EXSYNC and EXPOSURE
on, falling edge EXSYNC Signal = Exposure off
= 1 SHUTTER Signal active, for CameraLink
standard set 0 DVAL = 1
= 1 Enable line preload
= 1 Enable line reset at the middle of a line
0
Description
= 1 Enable asynchronous serial communications
interface to ADC module
-
NOTE: The frame rate sets the maximum exposure
45
Default
0
1
0
0
Default
0
0
03-32-00525-04