SP-20000M-PMCL / SP-20000C-PMCL
- 59 -
7.5.6 GPIO TTL output timing if Trigger Overlap is Readout
(a)
(b)
(c)
(d)
(e)
(f)
(h)
(i)
(j)
(k)
Frame Start
Trigger
Frame
Trigger Wait
Frame Active
Exposure
Active
FVAL Active
(g)
(l)
Fig. 28 GPIO timing (Overlap = Readout)
Table - 39
GPIO output timing(Reference) (80 MHz, EPS Trigger, Trigger Overlap = Readout )
Description
1X8-1Y
1X4-1Y
1X2
–
1Y
Note
(a)
Frame Start Trigger
to
Frame Trigger Waite Falling Edge
810 ns
810 ns
1.010 us
(b)
Exposure Active Falling Edge
to
FVAL Rising Edge
320 us
(320 us)
328 us
(328 us)
656 us
(656 us)
Varies by Tap Geometry setting.
(c)
Frame Active Falling Edge
to
Frame Trigger Wait Rising Edge
7.15 us
7.15 us
7.15 us
Phase if [Exposure Time] is set to 10us
(d)
Exposure Active
8.93 us
(10.28 us)
8.93 us
(10.28 us)
9.00 us
(10.33 us)
If [Exposure Time] is 10,
( ) is Exposure Active which is assigned
to Camera Link Spare Bit
(e)
FVAL Active
31.42 ms
62.84 ms
125.69 ms
If Binning off and [Height]=3840,
(Will be changed by Height setting)
(f)
Frame Active
31.75 ms
63.18 ms
126.36 ms
If [Exposure Mode] is Timed
(g)
Exposure Active Falling Edge
to
Frame Trigger Wait Rising Edge
241.03 us
231.84 us
470.81 us
(h)
Frame Active Falling Edge
to
FVAL Falling Edge
1.10 us
1.27 us
370 ns
This will be different by Binning or ROI
setting. Frame Active End Edge against
FVAL Active End is shifted by approx.
2us.
(i)
Frame Trigger wait Falling Edge
to
Frame Active Rising Edge
1.22 us
1.22 us
1.22 us
(j)
Frame Active Rising Edge
to
Exposure Active Rising Edge
0 ns
0 ns
0 ns
(k)
Frame Start Trigger
to
Exposure Active Rising Edge
2.04 us
(470 ns)
2.04 us
(470 ns)
1.01 us
(660 ns)
Exposure Active at TTL I/F
( ) is if comparing with Exposure Active
which is assigned to Camera Link Spare
Bit
(l)
Exposure Active Rising Edge
Variableness
31.50 ms
62.93 ms
125.87 ms
Varies by [Exposure Time] setting
Exposure Active Start Edge:
CL/TTL out phase
difference
1.58 us
1.58 us
1.58 us
Exposure Active End Edge:
CL/TTL out phase
difference
230 ns
230 ns
230 ns
Note: The timing in this table is in the condition that the trigger pulse is not input during the video readout from the previous
trigger. This is for the explanation of the phase relation between Frame Trigger Wait and Frame Active.
Frame Start -Trigger Mode =
“
On
”
Exposure Mode =
“
Timed
”
Trigger Overlap =
“
Readout
”
Starting position of Frame Trigger Active at EPS Trigger
/ [Trigger Overlap] =
“Readout” setting.
The starting position will vary until [Exposure Time] value
exceeds ([FVAL]+[Exposure Active End Edge ~ FVAL Active
Start Edge]-158).
[FVAL]+[Exposure Active End Edge ~ FVAL Active Start Edge]
is a constant value. If [Exposure Time] is smaller than this
constant value, the overlap period is shorter and if [Exposure
Time] is larger than this constant value, the overlap period is
longer.