RM0440 Rev 4 1133/2126
RM0440 Advanced-control timers (TIM1/TIM8/TIM20)
1226
Figure 316. Break and Break2 circuitry overview
Note: An asynchronous (clockless) operation is only guaranteed when the programmable filter is
disabled. If it is enabled, a fail safe clock mode (for example by using the internal PLL and/or
the CSS) must be used to guarantee that break events are handled.
When one of the breaks occurs (selected level on one of the break inputs):
• The MOE bit is cleared asynchronously, putting the outputs in inactive state, idle state
or even releasing the control to the GPIO controller (selected by the OSSI bit). This
feature is enabled even if the MCU oscillator is off.
• Each output channel is driven with the level programmed in the OISx bit in the
TIMx_CR2 register as soon as MOE=0. If OSSI=0, the timer releases the output control
(taken over by the GPIO controller), otherwise the enable output remains high.
• When complementary outputs are used:
– The outputs are first put in inactive state (depending on the polarity). This is done
asynchronously so that it works even if no clock is provided to the timer.
– If the timer clock is still present, then the dead-time generator is reactivated in
order to drive the outputs with the level programmed in the OISx and OISxN bits
after a dead-time. Even in this case, tim_ocx and tim_ocxn cannot be driven to
MSv62336V1
Enable
Enable
Enable
Enable
tim_sys_brk3
tim_sys_brk2
tim_sys_brk1
tim_sys_brk0
CSS
SBIF flag
tim_sys_brk
BK2CMP5E..BK2CMP7E
TIMx_BKIN2
from AF
controller
BK2INE
BK2INP
BK2E
Application break requests
tim_brk2
B2IF flag
tim_brk2_cmp5..7
3
tim_brk2_cmp1..4
BK2CMP4E
BK2CMP1P..BK2CMP4P
4
4
3
BK2F[3:0] BK2P
BK2CMP1E
...
Filter
BKCMP5E..BKCMP7E
TIMx_BKIN
from AF
controller
BKINE
BKINP
Software break
requests: BG
BKE
Application break requests
tim_brk
BIF flag
tim_brk_cmp5..7
3
tim_brk_cmp1..4
BKCMP4E
BKCMP1P..BKCMP4P
4
4
3
BKF[3:0] BKP
BKCMP1E
...
Filter
Software break
requests: B2G
Enable
tim_sys_brkx
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