ElectShutter
Camera Input
ExSync
Camera Input
LineValid
Camera Output
Notes specific to this mode
1 The user initiates the reset-&-integration cycle by taking the ElectShutter Camera Input high
2 The user terminates integration by taking the ElectShutter Camera Input low
3ElectShutter will not be recognized by the camera until a time "tx2p" after ExSync is brought low
4 If ElectShutter is brought high earlier than constrained above, the camera will interpret this as ElectShutter
going high "tx2p" after ExSync went high
5 Any software command setting integration time is overridden by ElectShutter Camera Input
6 If ElectShutter is still high when ExSync is taken low to initiate the next readout cycle, then integration is
immediatel
y
terminated
7 The user can read data from the CAM/CMOS - 2K.LS while LineValid is high as shown above.
Table 3.4.5 -- Mode 4: ExSync Synchronization and Electronic Shutter Control
...this mode gives the user full asynchronous hardware control over start and end of integration
with the "ElectShutter" Camera Input.
tXFR
tLinePeriod
tReadout
2048 Clock Cycles
tReset
nn+1
tWait
>tx2p
tIntegration
Data Cam era O utput
Strobe Camera Output
Line Valid Camera Output
1 2 3 2047 2048
>tMinSync
tHoldLow tHoldHigh
>tSetup
Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User’s Manual • Rev A • 23 of 41