GETTING STARTED
picasso
TM
cPCI-LS
User Manual
- 9 -
1.3.2
Exposure header
The exposure outputs on the AIA-connector can be used in two ways:
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Software triggered.
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Hardware triggered via exposure header.
Software or hardware triggered is software controlled.
EXPO0 can be used in two ways in bought modes, EXPO1 only in operating MODE 1.
EXPO1 has the function of a general purpose output in MODE 0.
In the software trigger mode you can select active-low or active-high. This depends on the
camera being used. Active-low or active-high means that the camera is exposing its CCD-sensor
during this time. The time lenght of the active status is also software adjustable. The minimum
exposure time is 6.375 µS and the maximum exposure time is 419 mS.
For the hardware trigger mode you should use the exposure header. In this mode the TTL signal
is given on the EXPO input and send to EXPO0 and EXPO1.
In Figure 3 you see a close-up of the Exposure header. The pin connections are listed in Table 2.
There are a couple of ways to regenerate to the EXPO (EXPO0 and EXPO1) outputs.
This depends on the method being used, see figures below:
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EXPO output is directly EXPO input
-
EXPO output is the invertion of EXPO input
Figure 3: Close-up of the
Exposure header
Header 2X5
Pins
EXPO Input
1
VCC, 250 mA
2
GND
4,6,8,10
Reserved
3,5,7,9
Table 2
EXPO input
EXPO output
EXPO output inverted
EXPO input
2
4
6
8
10
1
3
5
7
9
