mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 266

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

FlexTimer Module (FTMV1)
11.4.15 Polarity Control
The polarity control mode is enabled if (FTMEN = 1). Each channel has its polarity control defined by its
POLn bit.
If (POLn = 0), the signal driving the polarity control is the same polarity as the channel (n) output.
If (POLn = 1), the signal driving the polarity control is negated at the channel (n) output.
11.4.16 Initialization
The initialization of the output channels is enabled if (FTMEN = 1). When a logic 1 is written to the INIT
bit, the value of the CHnOI bit is forced to the channel (n) output.
initialization feature over the other features that are combined to generate the channels (n) and (n+1)
output.
It is recommended using the intialization only if the FTM counter is disabled (that is, CLKS[1:0] = 00),
otherwise unpredictable behavior is likely.
11-66
(synchronizer output if filter is
disabled, or filter output if
channel (n) output
channel (n) output
(after fault control with
manual fault clearing
(before fault control)
fault input
filter is enabled)
and POLn=0)
FAULTF bit
FTM counter
Polarity control is only available when (FTMEN = 1) and (COMBINE = 1)
and (CPWMS = 0). Polarity control 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 11-78. Fault control with manual fault clearing
FAULTF bit is cleared
the beginning of new PWM cycles
NOTE
Figure 11-79
shows the priority of the
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