Dalsa 1M75-SA User Manual page 37

1M28 and 1M75 User's Manual
To test the interface reliability, a 10 bit Linear Feedback Shift Register (LFSR) is
implemented. A LFSR is a sequential shift register with combinational feedback logic
around it that causes it to pseudo-randomly cycle through a sequence of binary values. It
is reset at every line start. Thus it is possible to compare the incoming signal with an
internally generated one to count the transmission errors.
Table 14: Mode Register 1 (Register address REGADDR = 7D = 07H)
Register address 7 - MODE1_REG
Bit
0 to 3
4
5
6
7
!
WARNING: Do not modify Mode Register 1 (bits 0 to 3). If corruption occurs, write in default values or contact
DALSA. Modifying these values may result in a malfunction or limited functioning of the camera.
You should use the LSFR test pattern for data path integrity. Alternately, you can turn on
the dummy line. With the help of the dummy line, the transfer of data from the camera to
the framegrabber card can be easily tested.
When bits 5 to 7 are switched on (or off), a possible bias re-tuning of the video amplifier is
required. Typically this involves adjustment to the camera's offset level.
Register address 08H and 09H (Interface DAC)
The registers 08H and 09H are used for the DAC access and for adjustments to the camera
in the various operating modes.
WARNING: Do not modify these values. An incorrect value can cause a malfunction of the camera!
Register address 0AH and 0BH
The registers 0AH and 0BH are NOT used.
Register address 0CH to 0EH (Mode register extended functions)
The registers 12 – 14 contain extended functions for camera adjustment.
Table 15: Mode register 2 (Register address REGADDR = 12D = 0CH)
Register address 12 - MODE2_REG
Bit
0
1
2
3
4
DALSA
PRELIMINARY
Name Description
Reserved Do not change
EN_DUMMY = 1 Ł Dummy line on = 0 Ł Dummy line off
SKIM_IMAGE0 = 1 Ł Skim voltage 0 on, = 0 Ł Skim voltage 0 off 0
SKIM_IMAGE1 = 1 Ł Skim voltage 1 on, = 0 Ł Skim voltage 1 off 0
HIGH_GAIN = 1 Ł Gain by 4, = 0 Ł gain by 1
Name
SYNC_EXTERN
CONST_FRAMERATE
FLIP_IMAGE
EN_MROI
EN_LINE_HOPPING
Description
= 1 Ł external synchronisation
= 1 Ł constant frame rate (in free running
mode)
= 1 Ł output picture upside-down
= 1 Ł Activate MROI Mode
= 1 Ł Switch on line hopping
37
Default
0
0
0
Default
0
1
0
0
0
03-32-00525-03