Currently I am investigating an issue related to measurement mode 2 with 4 cycles of averaging, expecting two stops per cycle. Looking at the data calculated by the firmware it seems like the TDC7200 skips START signal flanks when the two stop times become bigger (bigger TOF). The data is still intact and my calculations correspond to what I am seeing on my scope. However, the TDC7200 needs more measurement cycles for the same result as before. The interrupt comes later.
I use a calibration time of 10 cycles was used. I found out, that I do not have problems with START signal skips when I change this calibration time to 2 cycles. How is that possible? Does the second stop trigger a calibration in the multi-cycle averaging configuration?