42
NED
XCM2080SAT4
/
XCM2040SAT4
UME-0006-04
4.9.1.1 Programmable exposure setting time and calculation of scan cycle
Calculation 1) P = Counter ÷ {Clock ÷ 2 ÷ Dividing}
Calculation 2) S = P + [{P 6} ÷ {Clock ÷ 2 ÷ Dividing}]
P
Programmable exposure time (
μs)
S
Scan rate (
μs)
Clock
80 / 40(MHz)
Padding
20
（
fixed
）
Dividing
2 / 4
Counter
134
～
32767
(Example) In case of Camera is
”XCM2080SAT4” and commando is ”int
□
2
□
1000
”
Clock = 80
，
Dividing = 2
，
Counter = 1000
Programmable exposure time (
μs) = 1000 ÷ {80 ÷ 2 ÷ 2} = 50
Scan rate (
μs) = 50 + [{20 + 6} ÷ {80 ÷ 2 ÷ 2} = 51.3
4.9.2
External Trigger
Exposure Mode (
External trigger edge
)
In external trigger exposure mode (Trigger Edge), the exposure time is determined
by the setting for the line period parameter, each exposure starts with the rising edge
and the line period is determined by the time from rising edge to rising edge of the
internal control signal. The range of programmable exposure time, the timing chart of
the exposure and the readout are shown below.
Table 4-9-2-1 Programmable Exposure Time
Item
symbol
XCM2080SAT4
XCM2040SAT4
Programmable
exposure time
P
6.7
～
3276.7(4TAP)
13.4
～
3276.7 (2TAP)
13.4
～
6553.4(4TAP)
26.8
～
6553.4 (2TAP)
Readout time
R
6.4(2K 4TAP, 1K 2TAP)
12.8(2K 2TAP)
12.8(2K 4TAP, 1K 2TAP)
25.6(2K 2TAP)
Scan Rate
S
8
～
3279.3(4TAP)
14.7
～
3279.3 (2TAP)
16
～
6558.6(4TAP)
29.4
～
6558.6(2TAP)
Trigger pulse H time
T1
≧
0.05
≧
0.1
Trigger pulse L time
T2
≧
0.05
≧
0.1
Trigger pulse cycle
T3
≧
S
≧
S
(unit::
μs)
