
41.5.13.10 FTM counter synchronization
The FTM counter synchronization is a mechanism that allows the FTM to restart the
PWM generation at a certain point in the PWM period. The channels outputs are forced
to their initial value, except for channels in Output Compare mode, and the FTM counter
is forced to its initial counting value defined by CNTIN register.
The following figure shows the FTM counter synchronization. Note that after the
synchronization event occurs, the channel (n) is set to its initial value and the channel (n
+1) is not set to its initial value due to a specific timing of this figure in which the
deadtime insertion prevents this channel output from transitioning to 1. If no deadtime
insertion is selected, then the channel (n+1) transitions to logical value 1 immediately
after the synchronization event occurs.
synchronization event
channel (n+1) match
FTM counter
channel (n) match
channel (n) output
(after deadtime
insertion)
channel (n+1) output
(after deadtime
insertion)
Figure 41-67. FTM counter synchronization
The FTM counter synchronization can be done by either the enhanced PWM
synchronization (SYNCMODE = 1) or the legacy PWM synchronization (SYNCMODE
= 0). However, the FTM counter must be synchronized only by the enhanced PWM
synchronization.
In the case of enhanced PWM synchronization, the FTM counter synchronization
depends on SWRSTCNT and HWRSTCNT bits according to the following flowchart.
Chapter 41 FlexTimer Module (FTM)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
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Summary of Contents for MWCT101 S Series
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Page 70: ...Aliased bit band regions MWCT101xS Series Reference Manual Rev 3 07 2019 70 NXP Semiconductors...
Page 78: ...Pinout diagrams MWCT101xS Series Reference Manual Rev 3 07 2019 78 NXP Semiconductors...
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Page 528: ...Module clocks MWCT101xS Series Reference Manual Rev 3 07 2019 528 NXP Semiconductors...
Page 634: ...SRAM configuration MWCT101xS Series Reference Manual Rev 3 07 2019 634 NXP Semiconductors...
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Page 992: ...ADC calibration scheme MWCT101xS Series Reference Manual Rev 3 07 2019 992 NXP Semiconductors...
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Page 1726: ...Debug and security MWCT101xS Series Reference Manual Rev 3 07 2019 1726 NXP Semiconductors...
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