Description of the data path
STINGRAY Technical Manual
V2.2.0
136
– (standard Update): uses the previous parameters until the update
flag is reset
– (
Quick Format Change Mode
): waits until the update flag is reset.
In the
Encapsulated Update (begin/end)
the exact sequence is:
1.
Parameter update begin (advanced feature register)
2.
Standard IIDC register update (1..N register) (standard feature register)
3.
Parameter update end (advanced feature register)
Camera timing behavior is like this:
If after end of time-out (10 seconds after
Quick Format Change Mode
) no
parameter update end
is sent, all changes will become valid.
A new write event of
parameter update begin
starts time-out again.
Parameter-List Update
In the
Parameter-List Update
mode a complete list with IIDC addresses and
values of up to 64 parameters is sent to the camera.
•
Host sends a list with parameters to the camera (advanced feature
space)
•
Microcontroller processes that list
•
All parameters will become active for the same image
•
Dependent on timing mode, the camera will:
–
Standard Format Change Mode
: use the previous parameters until
the new parameter set is copied to the FPGA
–
Quick Format Change Mode
(QFCM)
: waits until all parameters have
been copied to the FPGA and may interrupt an already started inte-
gration for a new integration with the new settings
Fast Parameter Update Timing
Quick Format Change Mode
After the parameter update stop command all
changed parameters are valid for the available
next image. Frame rate is constant.
After the parameter update start command a cur-
rent transfer is interrupted. A started exposure
will be interrupted until the next parameter
update stop command. Exposure of the next image
with new parameters is started.
There may be a gap between two succeeding
images but images are always transmitted com-
peletely.
Table 43:
Encapsulated Update (begin/end)
: comparison of standard timing and fast timing 2