ST SPC560P34 - Figure 436. FCU Fault Handling

Fault Collection Unit (FCU) RM0046
756/936 Doc ID 16912 Rev 5
Figure 436. FCU fault handling
FCU detects
a fault
Is
NO
Fault is collected
into FFR
(FER)
FCU takes no action
Is Timeout
enabled for this fault?
YES
NO
FCU goes into Fault
state
and communi-
cates fault to the
external pin.
YES
FCU goes into Alarm
state and a timer is
started.
(FCTER)
Is the fault
recovered in SW before
timeout?
Fault flag can be cleared (FFR).
If fault flag is cleared, FCU returns
NO
to Normal state.
Is the fault
recovered in HW before
YES
timeout?
SW recoverable fault
YES
Fault flag is cleared automatically.
FCU returns to Normal state.
HW recoverable fault
NO
Fault enabled?
FCU goes into Fault
state
and communi-
cates fault to the
external pin.