45
NED
XCM2085DLMT2
UME-0059-02
4.8.2 External Trigger Exposure Mode (External trigger edge)
In external trigger exposure mode (Trigger Edge), the exposure time is determined
by the setting through serial communication, each exposure starts with the rising
edge and the line period is determined by the time from rising edge to rising edge of
the trigger pulse. The range of programmable exposure time, the timing chart of the
exposure and the readout are shown below.
Note:
We recommend that you set the values for the trigger pulse cycle(c) and the
exposure time(p) so that the value of the difference is less than 5
µ
s.
Table 4-8-2-1 Programmable Exposure Time(Trigger Edge)
85MHz
40MHz
p Programmable exposure
time
11.082
～
12336.176
24.3
～
12336.176
r Readout time
12.07
25.6
a Trigger pulse H time
≧
0.024
≧
0.024
b Trigger pulse L time
≧
0.024
≧
0.024
c Trigger pulse cycle
≧
13.212
≧
27.525
(unit
：
µ
s)
Figure 4-8-2-1 External Trigger (Trigger Edge) Exposure Mode
Note:
The timing of reading out does one scanning delay from the exposure.
Readout
