182
XMEGA A [MANUAL]
8077I–AVR–11/2012
Bit 3 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero when this
register is written.
Bit 2 – FDMODE: Fault Detection Restart Mode
This bit sets the fault protection restart mode. When this bit is cleared, latched mode is used, and when it is set, cycle-by-
cycle mode is used.
In latched mode, the waveform output will remain in the fault state until the fault condition is no longer active and the FDF
has been cleared by software. When both conditions are met, the waveform output will return to normal operation at the
next UPDATE condition.
In cycle-by-cycle mode, the waveform output will remain in the fault state until the fault condition is no longer active.
When this condition is met, the waveform output will return to normal operation at the next UPDATE condition.
Bit 1:0 – FDACT[1:0]: Fault Detection Action
These bits define the action performed, according to Table 15-1, when a fault condition is detected.
Table 15-1. Fault actions.
15.7.4 STATUS – Status register
Bit 7:3 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to zero
when this register is written.
Bit 2 – FDF: Fault Detect Flag
This flag is set when a fault detect condition is detected; i.e., when an event is detected on one of the event channels
enabled by FDEVMASK. This flag is cleared by writing a one to its bit location.
Bit 1 – DTHSBUFV: Dead-time High Side Buffer Valid
If this bit is set, the corresponding DT buffer is written and contains valid data that will be copied into the DTLS register on
the next UPDATE condition. If this bit is zero, no action will be taken. The connected timer/counter unit’s lock update
(LUPD) flag also affects the update for dead-time buffers.
Bit 0 – DTLSBUFV: Dead-time Low Side Buffer Valid
If this bit is set, the corresponding DT buffer is written and contains valid data that will be copied into the DTHS register
on the next UPDATE condition. If this bit is zero, no action will be taken. The connected timer/counter unit's lock update
(LUPD) flag also affects the update for dead-time buffers.
FDACT[1:0]
Group configuration
Description
00
NONE
None (fault protection disabled)
01
Reserved
10
Reserved
11
CLEARDIR
Clear all direction (DIR) bits which correspond to the enabled DTI
channel(s); i.e., tri-state the outputs
Bit
765
43
2
1
0
+0x04
FDF
DTHSBUFV
DTLSBUFV
Read/Write
R
R/W
Initial Value
0
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