Pike Technical Manual
V5.2.0
180
Description of the data path
•
New:
Quick Format Change Mode
In the following you find a short description of both timing modes:
Standard Parameter Update Timing
The
Standard Parameter Update Timing
keeps the frame rate constant and does
not create any gaps between two image transfers via bus (precondition: expo-
sure (shutter) time must be smaller than transfer time).
•
Frame rate / transfer rate is always constant
(if shutter time
transfer time)
•
Delay from shutter update until change takes place is always 2 frames
(delay from update command reception by FPGA and not by microcontrol-
ler)
•
Parameters sent to the camera faster than max. frame rate are no longer
stored in a FIFO. The last sent parameter will be activated for the next
image. All others will be dropped. This ensures that the last image is shot
with the last shutter setting.
New: Quick Format Change Mode (QFCM)
The
Quick Format Change Mode
creates gaps between two images. Current
exposure is interrupted and the new exposure is started immediately with new
parameters if during exposure (integration/shutter) an new shutter command is
received.
•
Frame rate / transfer rate can be
interrupted.
This is shown in the diagram
below whenever FVal goes low after a reception of a new shutter command
while Sync was low.
•
Shutter will be interrupted, if the update command is received while cam-
era integrates
•
Delay from shutter update until change takes place is always 1 frame (the
delay is calculated from update command reception by FPGA and not by
microcontroller)
Figure 104:
Quick Format Change Mode
