NXP Semiconductors K22F series - Complementary Mode

C(n)V
CNTIN
channel (n) output
with ELSnB:ELSnA = X:1
channel (n) output
with ELSnB:ELSnA = 1:0
FTM counter
C(n+1)V
MOD
Figure 39-39. Channel (n) output if (C(n+1)V > MOD) and (CNTIN < C(n)V < MOD)
FTM counter
CNTIN
C(n+1)V
not fully 0% duty cycle
channel (n) output
with ELSnB:ELSnA = 1:0
not fully 100% duty cycle
channel (n) output
with ELSnB:ELSnA = X:1
MOD = C(n)V
Figure 39-40. Channel (n) output if (C(n+1)V > MOD) and (CNTIN < C(n)V = MOD)
39.4.8.1
Asymmetrical PWM
In Combine mode, the control of the PWM signal first edge, when the channel (n) match
occurs, that is, FTM counter = C(n)V, is independent of the control of the PWM signal
second edge, when the channel (n+1) match occurs, that is, FTM counter = C(n+1)V. So,
Combine mode allows the generation of asymmetrical PWM signals.
39.4.9
Complementary mode
The Complementary mode is selected when:
Functional description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
970 NXP Semiconductors