Configuration MC130x
Users Manual Rev. 2.1
6.6.2 Type of exposure
The MC130x can expose the images synchronous with or without
an electronic shutter, or asynchronous with a programmable inter-
nal timer or by pulse width control of the trigger pulse. Bits 7..4 of
registers r6 define exposure type: (
:r6[7..4]
).
table 6
r6
Bits
7 6 5 4
Camera
stop
x x x 0
Synchronous
0 0 0 1
Synchronous, with electr. shutter
0 0 1 1
Asynchronous, pulse width
1 0 1 1
Asynchronous,
timer
1 1 1 1
:r6[7..4] and type of exposure
6.6.3 Synchronous operation without shutter
Without electronic shutter the exposure time depends on the frame
rate. As frame size can be chosen arbitrarily, the frame rate can be
calculated from the time per one line (see Tab. 5).
6.6.4 Synchronous operation with shutter
In the sensor is implemented a freeze frame shutter, which allows
to reduce the exposure time in steps of one line.
Exposure time t
B
:
t
B
= (r1+r3-r2)
•
t
ZZ
)- t
ZZ
/2
with r2 < r1+r3
t
B
...
exposure time in s
r1
...
value
of
register
1
r2
...
value
of
register
2
r3
...
value
of
register
3
30