SCG_LPFLLCSR field descriptions (continued)
Field
Description
9
LPFLLTRUP
LPFLL Trim Update
0
Disable LPFLL trimming updates. LPFLL frequency determined by AUTOTRIM written value.
1
Enable LPFLL trimming updates. LPFLL frequency determined by reference clock multiplication
8
LPFLLTREN
LPFLL Trim Enable
0
Disable trimming LPFLL to an reference clock source
1
Enable trimming LPFLL to an reference clock source
7–2
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
1
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
0
LPFLLEN
LPFLL Enable
If this bit written during clock switching, it should be read back and confirmed before proceeding.
0
LPFLL is disabled
1
LPFLL is enabled
1. In open-loop mode (LPFLLTRUP=0), lock conditions cannot be checked.
18.3.19 Low Power FLL Divide Register (SCG_LPFLLDIV)
Changes to LPFLLDIV should be done when LPFLL is disabled to prevent glitches to
output divided clock.
Address: 4006_4000h base + 504h offset = 4006_4504h
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SCG_LPFLLDIV field descriptions
Field
Description
31–19
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
18–16
Reserved
This field is reserved.
This bit field is reserved. Software should write 0 to this bit field to maintain compatibility.
15–11
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
Table continues on the next page...
Memory Map/Register Definition
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
398
NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
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