\item bit 1: set this bit to reset the input trigger counters
\item bit 2: \verb|s_calibrate_delay|
\end{itemize}
\item[InvertEdgeW] Bottom 6 bits control what counts as leading edge of pulse. Set bit to 0 to trigger on low voltage to high voltage (e.g. TTL pulses). Set bit to 1 to trigger on high voltage to low voltage (e.g. NIM pulses, PMT pulses)
\item[SerdesRstR] Read register for the SerDes control.
\item[ThrCount0R] Read register. Returns the number of pulses above threshold for the trigger input.
\item[ThrCount1R] Read register. Returns the number of pulses above threshold for the trigger input.
