Information

CMPx_CR1 field descriptions (continued)
Field Description
0 Sampling mode is not selected.
1 Sampling mode is selected.
6
WE
Windowing Enable
At any given time, either SE or WE can be set. If a write to this register attempts to set both, then SE is set
and WE is cleared. However, avoid writing 1s to both field locations because this "11" case is reserved
and may change in future implementations.
0 Windowing mode is not selected.
1 Windowing mode is selected.
5
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
4
PMODE
Power Mode Select
See the electrical specifications table in the device Data Sheet for details.
0 Low-Speed (LS) Comparison mode selected. In this mode, CMP has slower output propagation delay
and lower current consumption.
1 High-Speed (HS) Comparison mode selected. In this mode, CMP has faster output propagation delay
and higher current consumption.
3
INV
Comparator INVERT
Allows selection of the polarity of the analog comparator function. It is also driven to the COUT output, on
both the device pin and as SCR[COUT], when OPE=0.
0 Does not invert the comparator output.
1 Inverts the comparator output.
2
COS
Comparator Output Select
0 Set the filtered comparator output (CMPO) to equal COUT.
1 Set the unfiltered comparator output (CMPO) to equal COUTA.
1
OPE
Comparator Output Pin Enable
0 CMPO is not available on the associated CMPO output pin. Instead, INV is driven if the comparator
owns the pin, which is usually a result of properly setting pin mux controls at the SoC level. If the
comparator does not own the pin, this field has no effect.
1
CMPO is available on the associated CMPO output pin.
The comparator output (CMPO) is driven out on the associated CMPO output pin if the comparator
owns the pin. If the comparator does not own the field, this bit has no effect.
0
EN
Comparator Module Enable
Enables the Analog Comparator module. When the module is not enabled, it remains in the off state, and
consumes no power. When the user selects the same input from analog mux to the positive and negative
port, the comparator is disabled automatically.
0 Analog Comparator is disabled.
1 Analog Comparator is enabled.
Memory map/register definitions
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
772
Preliminary
Freescale Semiconductor, Inc.
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