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RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 113
8.2 Camera Link
Channel Format
The Camera Link base mode, used on the
RMV, can transfer pixel data in 8, 10, 12 bit depths
and in one or two channels. Two channel mode
allows for a transfer clock frequency 1/2 of the sin-
gle channel mode. Because two channel mode
outputs two pixels per clock the DVAL signal does
cannot correctly specify valid data in all modes.
For example when binning the image the
DVAL signal is used to validate the summed pixel
data. In two channel mode the DVAL signal cannot
specify which of the two channels has valid or inva-
lid data. Thus single channel mode is preferred.
Serial Commands
Target
Index
Command
R/W
Description
04
01
Channels
W
0x0000 = Single channel output
0x0001 = Dual channel output
0x0002 = Normal order dual channel
0x0003 = Swapped order dual channel
Quick FAQ’s:
►Don’t confuse Single/Dual Channel with Single/
Dual CCD tap modes.
►Single channel output requires a pixel clock of
twice the frequency of the dual channel mode.
►Some PCI Camera Link cards have a maximum
pixel clock frequency of 66Mhz. With an RMV
camera operating in two tap mode at 40Mhz the
pixel rate is 80Mhz, greater than the card can han-
dle. The camera must be operated in dual channel
mode with these cards.
►DVAL = Data VALid: This Camera Link signal indi-
cates when pixel data is valid with a clock.
►LVAL = Line VALid: This Camera Link signal indi-
cates when pixel data is valid with a line.
►FVAL = Frame VALid: This Camera Link signal
indicates when line data is valid with a Frame.
►In two channel mode the two channels can be
swapped. This feature allows the camera to adapt
to the capture device.
A A A A A A
CCD
Sensor
Tap
Reorder
Image
Process
Camera
Link
Format
Single or Dual
channel output
Pixel Sample to Camera Link data path
A
B
Single channel
output
Dual channel
output
A B A B A B