mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 265

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

FlexTimer Module (FTMV1)
11.4.14.1 Automatic Fault Clearing
If the automatic fault clearing is selected (FAULTM[1:0] = 11), then the disabled channels outputs are
enabled when the fault input signal (FAULTIN) returns to zero (at the filter output if the filter is enabled,
or at the synchronizer output if the filter is disabled) and a new PWM cycle begins
(Figure
11-77).
When automatic fault clearing is selected, clearing the FAULTF bit will not affect disabled channels.
the beginning of new PWM cycles
FTM counter
channel (n) output
(before fault control)
fault input
(synchronizer output if filter is
disabled, or filter output if
filter is enabled)
channel (n) output
(after fault control with
automatic fault clearing
and POLn=0)
FAULTF bit
FAULTF bit is cleared
Figure 11-77. Fault control with automatic fault clearing
11.4.14.2 Manual Fault Clearing
If the manual fault clearing is selected (FAULTM[1:0] = 01 or 10), then disabled channels outputs are
enabled when the FAULTF bit is cleared and a new PWM cycle begins
(Figure
11-78).
It is possible to manually clear a fault, by clearing the FAULTF bit, and enable disabled channels regardless
of the fault input signal (FAULTIN) (the filter output if the filter is enabled or the synchronizer output if
the filter is disabled). However, it is recommended to verify the value of the fault input signal (value of the
FAULTIN bit) before clearing the FAULTF bit to avoid unpredictable results.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
11-65