Frequency, Acceleration, and Pulse Width

In addition to returning a count value for the counter channel, extended counters measure and return the following for the counter channel:

Instantaneous and average frequency
Instantaneous and average pulse width
Instantaneous and average acceleration

Count/Direction and Quadrature mode counters measure frequency, acceleration, and pulse width based on pulses on Input A.

Up/Down Pulses mode counters measure frequency, acceleration, and pulse width based on pulses on Input A. If there are no pulses on Input A, the counter measures frequency, acceleration, and pulse width based on pulses on Input B.

If the entire period of a pulse is detected on Input B while Input A is off, the measurements are measured on input B on the rising edge of the next pulse detected on Input B.

If the measurements are performed on input B, the measurements start being performed on Input A as soon as the leading edge of a pulse on Input A is detected.

Measured frequency and pulse width are always positive numbers. The direction of the counter, however, is determined by the direction bit.

All frequency, acceleration, and pulse width measurements are measured based on the input signal. The measurements continue even if the following occur when the measurement is taken:

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