Not all timed counter operations require a sample clock. For example, a simple buffered pulse width measurement latches in data on each edge of a pulse. For this measurement, the measured signal determines when data is latched in. These operations are referred to as implicit timed operations. However, many of the same measurements can be clocked at an interval with a sample clock. These are referred to as sample clocked operations. The following table shows the different options for the different measurements.
|Measurement||Implicit Timing Support||Sample Clocked Timing Support|
|Buffered Edge Count||No||Yes|
|Buffered Pulse Width||Yes||Yes|
|Buffered Two-Signal Edge Separation||Yes||Yes|