K60P100M100SF2RM Datasheet, PDF (874/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

CMP Functional Description
INTERNAL BUS
FILT_PER
EN, PMODE,HYSTCTR[1:0] COS INV
OPE
WE FILTER_CNT SE COUT IER/F
CFR/F
>^0x01
0
1
INP
+
-
Polarity
CMPO ^Select
Window
Control
Filter
Block
Interrupt
Control
IRQ
INM
WINDOW/SAMPLE
1
COUT
(TO OTHER SOC FUNCTIONS))
0
bus clock
FILT_PER
Clock
Prescaler
divided
bus
clock
0
CGMUX
SE=0
COUTA
1
CMPO to
PAD
COS
Figure 35-31. Sampled, Filtered (# 4B): Sampling point internally derived
The only difference in operation between Sampled, Non-Filtered (# 3B) and Sampled,
Filtered (# 4B) is that CR0[FILTER_CNT] is now greater than 1, which activates filter
operation.
35.8.1.5 Windowed Mode (#s 5A & 5B)
The following figure illustrates comparator operation in the windowed mode, ignoring
latency of the analog comparator, polarity select and Window Control block. It also
assumes that the Polarity Select is set to "non-inverting". Note that the analog comparator
output is passed to COUTA only when the WINDOW signal is high.
In actual operation, COUTA may lag the analog inputs by up to one bus clock cycle plus
the combinational path delay through the comparator and polarity select logic.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
874
Freescale Semiconductor, Inc.