High-resolution timer (HRTIM) RM0440
920/2126 RM0440 Rev 4
Figure 237. Burst mode trigger on external event
For TAEEV7 and TDEEV8 combined triggers (trigger on a timer period following an external
event), the external event detection is always active, regardless of the burst mode
programming and the on-going burst operation:
• When the burst mode is enabled (BME=1) or the trigger is enabled (TAEEV7 or
TDEEV8 bit set in the BMTRG register) in between the external event and the timer
period event, the burst is triggered.
• The single-shot burst mode is re-triggered even if the external event occurs before the
burst end (as long as the corresponding period happens after the burst).
Note: TAEEV7 and TDEEV8 triggers are valid only after a period event. If the counter is reset
before the period event, the pending hrtim_eev7 or hrtim_eev8 event is discarded.
Burst mode delayed entry
By default, the outputs are taking their idle level (as per IDLES1 and IDLES2 setting)
immediately after the burst mode trigger.
It is also possible to delay the burst mode entry and force the output to an inactive state
during a programmable period before the output takes its idle state. This is useful when
driving two complementary outputs, one of them having an active idle state, to avoid a
deadtime violation as shown on Figure 238. This prevents any risk of shoot through current
in half-bridges, but causes a delayed response to the burst mode entry.
MS32284V1
Counter
Output
Output
state
RUN RUN
External event
IDLE
Trigger on timer
period following
external event
RUN RUN
IDLE
Trigger on
external event
Output
Output
state
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