Technical Reference Manual
002-29852 Rev. *B
26.8.31 CLK_FLL_CONFIG2
Description:
FLL Configuration Register 2
Address:
0x40261534
Offset:
0x1534
Retention:
Retained
IsDeepSleep:
Yes
Comment:
This register contains frequency lock loop (FLL) configuration. FLL circuit settings should not
be changed while it is a selected clock (connected to logic). This prevents clock glitches that
can crash the logic. Deselect the FLL using .BYPASS_SEL=FLL_REF
Default:
0x20001
Bit-field Table
Bits
7
6
5
4
3
2
1
0
Name
FLL_REF_DIV [7:0]
Bits
15
14
13
12
11
10
9
8
Name
None [15:13]
FLL_REF_DIV [12:8]
Bits
23
22
21
20
19
18
17
16
Name
LOCK_TOL [23:16]
Bits
31
30
29
28
27
26
25
24
Name
UPDATE_TOL [31:24]
Bit-fields
Bits Name
SW
HW
Default or
Enum
Description
0:12
FLL_REF_DIV
RW
R
1
Control bits for reference divider. Set the divide value
before enabling the FLL, and do not change it while
FLL is enabled.
0: illegal (undefined behavior)
1: divide by 1
...
8191: divide by 8191
16:23 LOCK_TOL
RW
R
2
Lock tolerance sets the error threshold for when the
FLL output is considered locked to the reference input.
A high tolerance can be used to lock more quickly or
allow less accuracy. The tolerance is the allowed
difference between the count value for the ideal
formula and the measured value.
0: tolerate error of 1 count value
1: tolerate error of 2 count values
...
255: tolerate error of 256 count values
24:31 UPDATE_TOL
RW
R
0
Update tolerance sets the error threshold for when the
FLL will update the CCO frequency settings. The
update tolerance is the allowed difference between the
count value for the ideal formula and the measured
value. UPDATE_TOL should be less than LOCK_TOL.
1672
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers