
Table 38-3. Comparator sample/filter controls (continued)
Mode #
C0[EN]
C0[WE]
C0[SE]
C0[FILTER_CN
T]
C0[FPR]
Operation
2B
1
0
0
X
0x00
.
3A
1
0
1
0x01
X
Sampled, Non-Filtered mode
3B
1
0
0
0x01
> 0x00
4A
1
0
1
> 0x01
X
Sampled, Filtered mode
See the
4B
1
0
0
> 0x01
> 0x04
5A
1
1
0
0x00
X
Windowed mode
Comparator output is sampled on
every rising bus clock edge when
SAMPLE=1 to generate COUTA.
See the
.
5B
1
1
0
X
0x00
6
1
1
0
0x01
0x01–0xFF
Windowed/Resampled mode
Comparator output is sampled on
every rising bus clock edge when
SAMPLE=1 to generate COUTA,
which is then resampled on an
interval determined by C0[FPR] to
generate COUT.
.
7
1
1
0
> 0x01
0x01–0xFF
Windowed/Filtered mode
Comparator output is sampled on
every rising bus clock edge when
SAMPLE=1 to generate COUTA,
which is then resampled and filtered
to generate COUT.
All other combinations of C0[EN], C0[WE], C0[SE], C0[FILTER_CNT], and C0[FPR] are illegal.
For cases where a comparator is used to drive a fault input, for example, for a motor-
control module such as FTM, it must be configured to operate in Continuous mode so
that an external fault can immediately pass through the comparator to the target fault
circuitry.
Note
Filtering and sampling settings must be changed only after
setting C0[SE]=0, C0[FPR] =0 and C0[FILTER_CNT]=0x00.
This resets the filter to a known state.
Chapter 38 Comparator (CMP)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors
877
Summary of Contents for KE1xF Series
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