I'm trying to understand how FSIN works. The Hardware Message Syncing page says that it is a rising edge signal at the start of the capture frame. However the diagram lower on this page shows FSIN goes high at the same time as the strobe signal goes low, which suggests that it's high at the end of the frame. I would have thought it is high at the beginning of the strobe signal/frame exposure start.
Is the diagram incorrect or am I misunderstanding something?