NED
SUi7440
UME-0031-03
34
The video output phase is shown below.
無効
1
7400-2
7400-1
2
3
7400
無効
無効
無効
無効
無効
無効
無効
XClk
(40M)
DVAL
VIDEO
LVAL
7400CK
7408CK
2CK
Figure 4-7-2 Video Output Phase
FVAL = 0 (low level) fixed
4.8
Exposure Mode and Timing Chart
The camera has two exposure modes. The overview of each mode and the timing are
as follows.
4.8.1 Free Run Exposure Mode
In free-run exposure mode, the camera generates its own internal control signal based
on two programmable parameters, exposure time and readout time. The range of
programmable exposure time and the timing chart of the exposure and the readout are
shown below.
Exposure
Readout
(LVAL)
(1)
(2)
(3)
(4)
(5)
p
r
scan
(1)
(2)
(3)
(4)
Figure 4-8-1-1 Free Run Exposure Mode
The scan cycle (Programmable setting) can be set in the range 191.92
µ
s
~
20.97ms
(4798
~
524288CK
)
Scan Rate calculating formula Scan Rate
(
us
)=
Clocks
x
0.04
Invalid Invalid Invalid Invalid
Invalid Invalid Invalid Invalid