K60P100M100SF2RM Datasheet, PDF (871/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 35 Comparator (CMP)
35.8.1.3 Sampled, Non-Filtered Mode (#s 3A & 3B)
INTERNAL BUS
FILT_PER
EN,PMODE,HYSTCTR[1:0] COS INV
OPE
WE FILTER_CNT SE COUT IER/F
CFR/F
0
0x01 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=1
COUTA
1
CMPO to
PAD
COS
Figure 35-28. Sampled, Non-Filtered (# 3A): Sampling point externally driven
In Sampled, Non-Filtered mode, the analog comparator block is powered and active. The
path from analog inputs to COUTA is combinational (unclocked). Windowing Control is
completely bypassed. COUTA is sampled whenever a rising edge is detected on the Filter
Block clock input.
The only difference in operation between Sampled, Non-Filtered (# 3A) and Sampled,
Non-Filtered (# 3B) is in how the clock to the Filter Block is derived. In #3A, the clock to
filter block is externally derived while in #3B, the clock to filter block is internally
derived.
The comparator filter has no other function than sample/hold of the comparator output in
this mode (# 3B).
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
871