mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 268

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

FlexTimer Module (FTMV1)
11.4.19 Initialization Trigger
The initialization trigger is generated if (FTMEN = 1) and (INITTRIGEN = 1). The initialization trigger
is generated when the value of FTMxCNTINH:L registers are loaded into FTM counter in the following
cases:
The initialization trigger is an output signal to provide a trigger for other modules.
The width of an initialization trigger is a system clock period.
11-68
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•
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the FTMxCNTINH:L value is automatically loaded into the FTM counter after the maximum value
has been reached
when there is a write to FTMxCNTH or FTMxCNTL register
when there is the synchronization trigger event and (REINIT = 1)
if (FTMxCNTH:L = FTMxCNTINH:L) and (CLKS[1:0] = 00) and a value different from zero is
written to CLKS[1:0] bits
CH6TRIG=0 and CH7TRIG=0
CH6TRIG=1 and CH7TRIG=0
CH6TRIG=0 and CH7TRIG=0
CH6TRIG=1 and CH7TRIG=1
CH2TRIG=0, CH3TRIG=0,
CH4TRIG=0, CH5TRIG=0,
CH2TRIG=0, CH3TRIG=0,
CH4TRIG=0, CH5TRIG=0,
CH2TRIG=0, CH3TRIG=1,
CH4TRIG=1, CH5TRIG=1,
CH2TRIG=1, CH3TRIG=1,
CH4TRIG=1, CH5TRIG=1,
FTM counter = FTMxC7VH:L
FTM counter = FTMxC5VH:L
FTM counter = FTMxC4VH:L
FTM counter = FTMxC3VH:L
FTM counter = FTMxC2VH:L
match trigger when
FTM counter = FTMxC6VH:L
match trigger when
match trigger when
match trigger when
Match trigger is only available when (FTMEN = 1) and (COMBINE = 1)
and (CPWMS = 0). Match trigger with (FTMEN = 0) or (COMBINE = 0)
or (CPWMS = 1) is not recommended and its results are not guaranteed.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
(Figure
11-81)
(Figure
Figure 11-80. Match triggers
11-84)
the beginning of new PWM cycles
NOTE
(Figure
(Figure
11-82)
11-83)
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