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8.3.3
Pulse generators (20 bit x 4)
There are 4 pulse generators (designated 0 through 3) that can be used to create various timing
scenarios by programming start point, endpoint, length and repeats.
The following drawing is an example of settings.
FVAL is used for the input of a pulse generator 0 and the clock, after the rising edge of FVAL,
counts 100 clocks for the high period of the pulse and 102 clocks for the pulse length.
As 2400 is for Clock Pre-scaler, the output of the 12 bit counter is 25 KHz, which is 40µs.
Thus, pulse generator 0 creates a 4 ms pulse.
Pulse Generator 0
IN
(FVAL )
Clock IN
Clock Source=Pixel Clock ( 60MHz)
Clock Pre-scaler = 2400 ⇒ 25KHz
Start Point = 0
Pulse Generator 0
OUT
(GPIO Port 1 )
The following shows JAI SDK Camera Control Tool for setting Pulse Generators.
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Start Point
Start Point
End Point
End Point
Length
Length
Pulse Generator Clear = 4: Rising Edge
0
1
2
3
1/25KHz = 40µs
1
Length = 102
19
99 100 101 102 103
End Point = 100
2
Repeat counter: 0 to 255
=0: Continuously repeated
1
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