K60P100M100SF2RM Datasheet, PDF (872/1809 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
0
0x01 0
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
COUTA
1
CMPO to
PAD
SE=0
COS
Figure 35-29. Sampled, Non-Filtered (# 3B): Sampling interval internally derived
35.8.1.4 Sampled, Filtered Mode (#s 4A & 4B)
In Sampled, 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,
Filtered (# 4A) is that CR0[FILTER_CNT] is now greater than 1, which activates filter
operation.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
872
Freescale Semiconductor, Inc.