49
NED
XCM4040DLMT4
UME-0048-03
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.
Table 4-8-3-1 Programmable Exposure Time (Trigger Level)
r
Readout time
4096pixels_4tap
25.6
4096pixels_2tap
51.2
2048pixels_2tap
25.6
4096pixels_4tap
（
TypeB
）
25.6
a
Trigger pulse High time
4096pixels_4tap
≧
24.6
4096pixels_2tap
≧
50.2
2048pixels_2tap
≧
24.6
4096pixels_4tap
（
TypeB
）
≧
24.6
b
Trigger pulse Low time
≧
3.225
c
Trigger pulse cycle
4096pixels_4tap
≧
27.825
4096pixels_2tap
≧
53.425
2048pixels_2tap
≧
27.825
4096pixels_4tap
（
TypeB
）
≧
27.825
(unit
：
µs)
Figure 4-8-3-1 External Trigger (Trigger Level) Exposure Mode
at 4096pixels_4tap
Note:
The timing of reading out does one scanning delay from the exposure.
