Information

The FTM is able to generate multiple triggers in one PWM period. Because each trigger
is generated for a specific channel, several channels are required to implement this
functionality. This behavior is described in the following figure.
NOTE
(a) CH0TRIG = 0, CH1TRIG = 0, CH2TRIG = 0, CH3TRIG = 0, CH4TRIG = 0, CH5TRIG = 0
(b) CH0TRIG = 1, CH1TRIG = 0, CH2TRIG = 0, CH3TRIG = 0, CH4TRIG = 0, CH5TRIG = 0
(c) CH0TRIG = 0, CH1TRIG = 0, CH2TRIG = 0, CH3TRIG = 1, CH4TRIG = 1, CH5TRIG = 1
(d) CH0TRIG = 1, CH1TRIG = 1, CH2TRIG = 1, CH3TRIG = 1, CH4TRIG = 1, CH5TRIG = 1
the beginning of new PWM cycles
MOD
FTM counter = C5V
FTM counter = C4V
FTM counter = C3V
FTM counter = C2V
FTM counter = C1V
FTM counter = C0V
CNTIN
(a)
(b)
(c)
(d)
Figure 35-197. Channel match trigger
Note
The channel match trigger must be used only in Combine mode.
35.4.21 Initialization trigger
If INITTRIGEN = 1, then the FTM generates a trigger when the FTM counter is updated
with the CNTIN register value in the following cases.
• The FTM counter is automatically updated with the CNTIN register value by the
selected counting mode.
• When there is a write to CNT register
Functional description
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
796 Freescale Semiconductor, Inc.