Hi, I'm looking for some clarity around hardware implementation details for the Iphone 17 Pro / Pro Max's camera sync via SMPTE ST2139.
Question 1 (Signaling) ST2139 specifies that on the USB connector, D+ (pin A6 and B6), D- (pin A7 and B7) SBU1 (A8) and SBU2 (B8) can be used for sync signals. Does the iphone 17 pro / pro-max support all of these per the standard, or only a subset of these pins for sync signaling?
Question 2 (Frame rates) Does the Iphone 17 pro / pro-max support ST2139 sync at any / all of its video rates (24, 25, 30, 60, 100, 120 fps), or only a subset of those?
Question 3 (Sync tolerances) What is the tolerance of these rates to sync variation (ie would the phone/camera accept 29.970 sync when the camera is set to 30 fps?) and what are the tolerances for jitter to maintain a good sync lock?
Thanks