NXP Semiconductors MC9S08SU16 Reference Manual page 472

Functional description
EN,PMODE,HYSTCTR
INP
INM
bus clock
FILT_PER
Figure 25-9. Sampled, non-filtered (# 3B): sampling interval internally derived
25.7.4.3.4 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.
472
INTERNAL BUS
FILT_PER
COS INV
+
Polarity
Select
-
CMPO
WINDOW/SAMPLE
Clock
divided bus clock
Prescaler
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
OPE
FILTER_CNT SE COUT
WE
0
0x01 0
Window
Filter
Control
Block
1
0
CGMUX
SE=0
IER/F CFR/F
Interrupt
Control
IRQ
COUT
(TO OTHER SOC FUNCTIONS))
NXP Semiconductors