NXP Semiconductors Kinetis KE1xZ256, Reference Manual

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NOTE
The sample input must be high for ≥ 2.5 CMP bus clock cycles
to ensure no sampling event is missed.
37.7.6 Windowed/Resampled mode (# 6)
The following figure uses the same input stimulus shown in Figure 37-10 , and adds
resampling of COUTA to generate COUT. Samples are taken at the time points indicated
by the arrows in the figure. Again, prop delays and latency are ignored for the sake of
clarity.
This example was generated solely to demonstrate operation of the comparator in
windowed/resampled mode, and does not reflect any specific application. Depending
upon the sampling rate and window placement, COUT may not see zero-crossing events
detected by the analog comparator. Sampling period and/or window placement must be
carefully considered for a given application.
WINDOW
COUTA
COUT
CMPO
Minus input
Plus input
Figure 37-12. Windowed/resampled mode operation
This mode of operation results in an unfiltered string of comparator samples where the
interval between the samples is determined by FPR[FILT_PER] and the bus clock rate.
Configuration for this mode is virtually identical to that for the Windowed/Filtered Mode
shown in the next section. The only difference is that the value of C0[FILTER_CNT]
must be 1.
Chapter 37 Comparator (CMP)
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
NXP Semiconductors 797