software trigger event occurred; see
(PWMSYNC = 0) and (REINIT = 1) then SWSYNC bit is cleared when the software
trigger event occurs.
If SYNCMODE = 1 then the SWSYNC bit is also cleared by FTM according to the
SWRSTCNT bit. If SWRSTCNT = 0 then SWSYNC bit is cleared at the next selected
loading point after that the software trigger event occurred; see the following figure. If
SWRSTCNT = 1 then SWSYNC bit is cleared when the software trigger event occurs.
FTM input clock
selected loading point
PWM synchronization
SWSYNC bit
software trigger event
write 1 to SWSYNC bit
Figure 41-44. Software trigger event
41.5.12.3 Synchronization Points
The synchronization points are points where the registers can be updated with their write
buffer by PWM synchronization. These synchronization points are safe points because
guarantee smooth transitions in the generated PWM signals.
In
mode, the synchronization points are when the FTM counter changes
from MOD to CNTIN. In this case, the synchronization points are enabled if (CNTMIN =
1) or (CNTMAX = 1).
In
mode, the synchronization points are:
• if (CNTMAX = 1), when the FTM counter changes from (MOD - 1) to MOD;
• if (CNTMIN = 1), when the FTM counter changes from (CNTIN + 1) to CNTIN.
Functional description
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1052
NXP Semiconductors
Содержание KE1xF Series
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