Fairchild CAM/CMOS-2K.LS user manual ExSync Camera Input LineValid Camera Output

Figure 3.4.3 -- Mode 3: ExSync Synchronization with Programmable Integration Time

...Mode 3 is similar to Mode 2...

...the differences are that the reset-&-integration cycle is initiated when ExSync is taken low...

				...and the duration of integration
						tLinePeriod
n								n+1
	tReset3				tIntegration
						software
			user-set with command
			tHoldLow				tHoldHigh
		>tMinSync
							>tSetup

ExSync

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 reset-and-integration cycle is initiated by ExSync being taken low by the user; this has the effect of starting integration as soon as possible at the beginning of the line period

2ExSync must be returned high at least "tSetup" prior to taking it low again to signal the end of the line period

3The user sets integration time "tIntegration" with the software command set

4The 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• 23 of 42