Figure 36-27. Capture Action “DERIV0”
COUNT
"match"
ZERO
"update"
FaultA Input
TOP
CC0
CC0 Event/
Interrupt
Hardware
Halt Action
This is configured by writing 0x1 to the Fault n Halt mode bits in the Recoverable Fault n
Configuration register (FCTRLn.HALT). When enabled, the timer/counter is halted and the
cycle is extended as long as the corresponding fault is present.
The next figure ('Waveform Generation with Halt and Restart Actions') shows an example
where both restart action and hardware halt action are enabled for Fault A. The compare
channel 0 output is clamped to inactive level as long as the timer/counter is halted. The
timer/counter resumes the counting operation as soon as the fault condition is no longer
present. As the restart action is enabled in this example, the timer/counter is restarted
after the fault condition is no longer present.
The figure after that ('Waveform Generation with Fault Qualification, Halt, and Restart
Actions') shows a similar example, but with additionally enabled fault qualification. Here,
counting is resumed after the fault condition is no longer present.
Note that in RAMP2 and RAMP2A operations, when a new timer/counter cycle starts, the
cycle index will automatically change.
Figure 36-28. Waveform Generation with Halt and Restart Actions
HALT
COUNT
MAX
TOP
"match"
ZERO
"clear" update
Fault Input A
CC0
Restart
Restart
WO[0]
Atmel SAM L22G / L22J / L22N [DATASHEET]
Atmel-42402E-SAM L22G / L22J / L22N_Datasheet_Complete-07/2016
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