Configuration MC13xx
Users Manual Rev. 1.19
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6.12 Digital shading correction
For the best possible image quality even at the sensors clock limit, and non uniform lighting, the
MC13xx can store gray levels along one line and subtract these from all lines of an image.
To setup shading correction set: :r6[1] = 0.
Then a uniform object should be used together with the desired lighting, exposure mode and time and
lens. The lens should be closed so that the remaining light level along the center line of the image is as
close to zero as possible, but not reaching zero.
Then set :r6[1] = 1.
The gray levels along the center line of the image are saved in volatile memory and then subtracted
form all lines of the following images, as long as this bit remains set.
6.13 Digital gain
Digital gain selection is only possible with
video data width
2 x 8-Bit or 8 x 8-Bit. Out of the 10-bits
sensor data either the most significant 8 bits (gain 1), or bits 8..1 (gain 2), or the least significant 8 bits
(gain 4) are selected.
Command:
:r700x
x = 0: gain 1
x = 4: gain 2
x = 8: gain 4
6.14 External clock input
MC13xx frequency synthesizer can use the Camera Link® used to synchronize several MC13xx to one
master clock.
To activate set Bit 9 of register 7.
Command example:
:r7200
response: none
*
If the external reference clock is different from
3.6864 MHz, the codes for the clock synthesizer have
to be recalculated.
6.15 Polarity of EXP-signal
The polarity of the EXP-signal can be positive- or negative active.
Use :r7[8] to select.
Negativ = :r7[8] = 1
Positiv = :r7[8] = 0
Command example:
:r7100
Response: none