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Field
7
This field is reserved.
Reserved
This read-only field is reserved and always has the value 0.
6–4
Filter Sample Count
FLTCNT
This field represents the number of consecutive samples that must agree, prior to the comparator output
filter accepting a new output state. For information regarding filter programming and latency, see the
Functional Description.
000
Filter is disabled. If SE = 1, then COUT is a logic 0 (this is not a legal state, and is not
recommended). If SE = 0, COUT = COUTA.
001
1 consecutive sample must agree (comparator output is simply sampled).
010
2 consecutive samples must agree.
011
3 consecutive samples must agree.
100
4 consecutive samples must agree.
101
5 consecutive samples must agree.
110
6 consecutive samples must agree.
111
7 consecutive samples must agree.
3–1
This field is reserved.
Reserved
This read-only field is reserved and always has the value 0.
0
Comparator hard block Hysteresis control
HYST
Defines the programmable hysteresis level. The hysteresis value associated with each level is device-
specific. See the device's data sheet for the exact values.
0
Level 0
1
Level 1
25.6.18 LIMIT0 CMP Control Register 1 (GDU_LIMIT0CR1)
Address: 20h base + 1855h offset = 1875h
Bit
7
Read
SE
Write
Reset
0
Field
7
Sampling Enable
SE
At any given time, either SE or WE can be set. If a write to this register attempts to set both, then SE is set
and WE is cleared. However, avoid writing 1 to both bits because this "11" case is reserved and may
change in future implementations.
NOTE: Set this bit to zero, because the sample input is connected to the logic 1.
0
Sampling mode is not selected.
1
Sampling mode is selected.
NXP Semiconductors
GDU_LIMIT0CR0 field descriptions
6
5
0
WE
PMODE
0
0
GDU_LIMIT0CR1 field descriptions
Table continues on the next page...
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
Description
4
3
INV
COS
0
0
Description
Chapter 25 Gate Drive Unit (GDU)
2
1
OPE
EN
0
0
0
0
453
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