Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 717

21.3.3.3 Free-Running Mode
In free-running mode, the LETIMER acts as a regular timer and the repeat counter is disabled. When started, the timer runs until it is
stopped using the STOP command bit in LETIMERn_CMD. A state machine for this mode is shown in
Machine for Free-running Mode on page 717
Wait for positive clock edge
(RUNNING or START)
and !STOP
YES
CNT == 0
Note that the CLEAR command bit in LETIMERn_CMD always has priority over other changes to LETIMERn_CNT. When the clear
command is used, LETIMERn_CNT is set to 0 and an underflow event will not be generated when LETIMERn_CNT wraps around to
the top value or 0xFFFF. Since no underflow event is generated, no output action is performed. LETIMERn_REP0, LETIMERn_REP1,
LETIMERn_COMP0 and LETIMERn_COMP1 are also left untouched.
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.
NO
NO CNT = CNT - 1
YES CNT = TOP*
Figure 21.2. LETIMER State Machine for Free-running Mode
LETIMER - Low Energy Timer
Figure 21.2 LETIMER State
If (STOP)
RUNNING = 0
Else if (START)
RUNNING = 1
End if
START = 0
STOP = 0
TOP*
If (COMP0TOP)
TOP* = COMP0
Else
TOP* = 0xFFFF
Reference Manual
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