mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 250

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

FlexTimer Module (FTMV1)
FTM counter
FTMxC(n+1)VH:L
FTMxMODH:L =
FTMxC(n)VH:L
FTMxCNTINH:L
channel (n) output
not fully 0% duty cycle
with ELSnB:ELSnA = 1:0
channel (n) output
not fully 100% duty cycle
with ELSnB:ELSnA = X:1
Figure 11-59. Channel (n) output if (FTMxC(n+1)VH:L > FTMxMODH:L) and (FTMxCNTINH:L < FTMxC(n)VH:L
= FTMxMODH:L)
11.4.8.1
Asymmetrical PWM
The combine mode can be used to generate an asymmetrical PWM signal when FTMxC(n)VH:L is
different from FTMxC(n+1)VH:L.
11.4.9
Complementary mode
The complementary mode is selected when:
•
(FTMEN = 1) and (COMBINE = 1) and (CPWMS = 0) and (COMP = 1)
In complementary mode the channel (n+1) output is the inverse of the channel (n) output.
If (FTMEN = 1) and (COMBINE = 1) and (CPWMS = 0) and (COMP = 0), then the channel (n+1) output
is the same as the channel (n) output.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
11-50
Freescale Semiconductor