Fairchild CAM/CMOS-2K.LS user manual ElectShutter

Figure 3.4.4 -- 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.

						tLinePeriod
	n									n+1
					tReset
		tWait					tIntegration
ElectShutter		>tx2p
Camera Input
				tHoldLow				tHoldHigh
			>tMinSync
ExSync									>tSetup
Camera Input
LineValid
Camera Output

	tReadout
	2048 Clock Cycles
tXFR	Data Camera Output

1 2 3 1023 1024

Strobe Camera Output

Line Valid Camera Output

Notes specific to this mode

1The user initiates the reset-&-integration cycle by taking the ElectShutter Camera Input high

2The 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

4If ElectShutter is brought high earlier than constrained above, the camera will interpret this as ElectShutter going high "tx2p" after ExSync went high

5Any software command setting integration time is overridden by ElectShutter Camera Input

6If ElectShutter is still high when ExSync is taken low to initiate the next readout cycle, then integration is immediately terminated

7The user can read data from the CAM/CMOS - 2K.LS while LineValid is high as shown above.

Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User’s Manual • Rev C• 24 of 42