Hitachi HV-F22F Operation Manual page 56

(2) External trigger operating mode: Mode 1
When external trigger signal is high
active, after the trigger signal rise, the
flash signal start/end can be set to
determine the flash time.
At the flash signal falling edge, the
internal VD signal is reset and the video
data are transmitted.
Trigger pulse width > 43us
External Trigger
(High active)
minimum period = 1V
Exposure A
Internal VD
Internal Video
VD : 3H=126us
blank : 18 to 19H = 801us
Buffer Memory Write
DATA transfer
(YUV 16bit)
External Trigger
1H(cam)=
42us
Internal HD
6 to 7H(cam) = 253 to 295us
Internal VD
Exposure
4.0us 30us
Internal Video
Buffer Memory Write
DATA transfer
1 Frame = 33.3ms 30FPS
A B
A
Delay: 1250us
A
1Frame=66.6ms The highest transmission
15FPS
Frame reset
3H(cam) = 126us
12H(cam) = 506us
Delay: 1250us
DATA transfer START: 2.1ms
C D
speed: 69ms
A
A
42