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Figure 29. Integration Priority Mode Synchronization
Readout Priority.
This mode is used to synchronize the
readout
of scene information. This mode is useful
for downstream signal processing elements that either need to control when data is sent or need a fixed
relationship between the sync and when data is available.
Referring to Figure 30, below, the external frame sync initiates the readout period of the FPA. While not
immediately apparent, it also initiates the start of the integration period at a time calculated by the camera
which is approximately the time required for readout, less the user selected integration time.
At the end of the integration period, the FPA readout process is automatically started but the camera halts
this
immediately prior to the appearance of the first valid pixel.
At this point, the lockout period ends and
the camera will accept another sync. When the sync is received, the data readout process continues with
the readout of the first valid pixel, the lockout period begins, and at a later time, the integration period starts
again.
Frame Sync
FPA integrate
FPA readout
Integration peri od
Lockout
LVAL (Camera Link)
Data Output
# columns
line overhead
FPA integrate
data delay
FVAL (Camera Link)
