mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 693

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

30.8.1.4 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.
Freescale Semiconductor, Inc.
INM
INP
Figure 30-17. Sampled, Non-Filtered (# 3B): Sampling interval internally derived
FILT_PER
bus clock
EN,PMODE,HYSTCTR[1:0]
MCF51JF128 Reference Manual, Rev. 2, 03/2011
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+
Clock
Prescaler
CMPO
FILT_PER
WINDOW/SAMPLE
COS
divided bus clock
Polarity
Select
INV
Preliminary
INTERNAL BUS
Window
Control
WE
0
SE=0
1
0
FILTER_CNT
CGMUX
0x01
Filter
Block
0
SE
COUT
COUTA
OPE
Chapter 30 Comparator (CMP)
(TO OTHER SOC FUNCTIONS))
COUT
IER/F
Interrupt
Control
COS
1
0
CFR/F
CMPO to
PAD
IRQ
693