UM0306 Advanced control timer (TIM1)
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Dead-time insertion is enabled by setting both CCxE and CCxNE bits, and the MOE bit if the
break circuit is present. There is one 10-bit dead-time generator for each channel. From a
reference waveform OCxREF, it generates 2 outputs OCx and OCxN. If OCx and OCxN are
active high:
● The OCx output signal is the same as the reference signal except for the rising edge,
which is delayed relative to the reference rising edge.
● The OCxN output signal is the opposite of the reference signal except for the rising
edge, which is delayed relative to the reference falling edge.
If the delay is greater than the width of the active output (OCx or OCxN) then the
corresponding pulse is not generated.
The following figures show the relationships between the output signals of the dead-time
generator and the reference signal OCxREF. (we suppose CCxP=0, CCxNP=0, MOE=1,
CCxE=1 and CCxNE=1 in these examples)
Figure 58. Complementary output with dead-time insertion.
Figure 59. Dead-Time waveforms with delay greater than the negative pulse.
Figure 60. Dead-Time waveforms with delay greater than the positive pulse.
The dead-time delay is the same for each of the channels and is programmable with the
DTG bits in the TIM1_BDTR register. Refer to Section 12.5.18: Break and dead-time
register (TIM1_BDTR) on page 216 for delay calculation.
delay
delay
OCxREF
OCx
OCxN
delay
OCxREF
OCx
OCxN
delay
OCxREF
OCx
OCxN
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