meas_negedge :
Measurement of the time instants of an xbit-typed signal’s falling transition events.

The meas_negedge primitive measures the time instants when an xbit-typed signal in has the (N+k*P)-th falling transition after a specified delay, where k is 0, 1, 2, and so on. The output is a real-typed value indicating the absolute time of each event. The triggering count N, period P, and delay are defined by the parameters times, period, and delay, respectively. When the parameter times is less than or equal to 0, the primitive updates the measurement whenever in has a falling transition after the delay. This primitive is equivalent to the meas_edge primitive with the direction parameter set to -1.

Input/Output Terminals

Name	I/O	Type	Description
out	output	real	measurement output
in	input	xbit	input signal

Parameters

Name	Type	Default	Unit	Description
delay	real	0.0	seconds	triggering delay
times	integer	0	None	triggering count
period	integer	0	None	triggering period