46
NED
XCM2085DLMT2
UME-0059-02
4.8.3
External Trigger Exposure Mode (Trigger Level)
In external trigger exposure mode (Trigger Level), the exposure time is determined
by the high trigger pulse time, each exposure starts with the rising edge and the line
period is determined by the time rising edge to rising edge of 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 value of the trigger pulse L time (b) to less than
5
µ
s.
Table 4-8-3-1 Programmable Exposure Time (Trigger Level)
85MHz
40MHz
r Readout time
12.07
25.6
a
Trigger pulse H time
≧
11.102
≧
24.3
b
Trigger pulse L time
≧
2.100
≧
3.225
c
Trigger pulse cycle
≧
13.212
≧
27.525
(unit
：
µ
s)
Figure 4-8-3-1 External Trigger (Trigger Level) Exposure Mode
Note:
The timing of reading out does one scanning delay from the exposure.
