Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
8:20
SETTLING_COUNT
RW
R
40
Number of undivided reference clock cycles to wait
after changing the CCO trim until the loop
measurement restarts. A delay allows the CCO output
to settle and gives a more accurate measurement. The
default is tuned to an 8MHz reference clock since the
IMO is expected to be the most common use case.
0: no settling time
1: wait one reference clock cycle
...
8191: wait 8191 reference clock cycles
28:29 BYPASS_SEL
RW
R
0
Bypass mux located just after FLL output. This register
can be written while the FLL is enabled. When
changing BYPASS_SEL, do not turn off the reference
clock or CCO clock for five cycles (whichever is
slower). In case of disabling FLL(FLL_ENABLE=0),
additional five cycles are required. Refer to FLL
disable sequence for more details in
CLK_FLL_CONFIG->FLL_ENABLE. Whenever
BYPASS_SEL is changed, it is required to read
CLK_FLL_CONFIG3 to ensure the change takes
effect.
AUTO
0
Automatic using lock indicator. When unlocked,
automatically selects FLL reference input (bypass
mode). When locked, automatically selects FLL output.
This can allow some processing to occur while the FLL
is locking, such as after DEEPSLEEP wakeup. It is
incompatible with clock supervision, because the
frequency changes based on the lock signal.
LOCKED_OR_NOTHING
1
Similar to AUTO, except the clock is gated off when
unlocked. This is compatible with clock supervision,
because the supervisors allow no clock during startup
(until a timeout occurs), and the clock targets the
proper frequency whenever it is running.
FLL_REF
2
Select FLL reference input (bypass mode). Ignores
lock indicator
FLL_OUT
3
Select FLL output. Ignores lock indicator.
1674
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers