9.4.7.5 Scan Postscaler Configuration

This setting controls the interval between consecutive input scan cycles. VMxCON[SCANPS] sets the frequency of the round-robin tests; the frequency setting determines the inactive time between the round-robin test sequences.

The base duration is approximately 29 μS (34 kHz frequency) for 5 inputs, based on a 170 kHz internal clock. A value of 0b000 enables continuous, back-to-back scanning at the base duration, which is the maximum rate. One additional clock cycle is used for the WRALLOW pulse. Higher SCANPS values apply post-scaling to extend the interval between scans:

111: 16,384x base duration
...
010: 16x base duration
001: 4x base duration

This allows the scan rate to be adjusted to suit application requirements such as power consumption or processing bandwidth.