Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
665
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
Figure 30-32.Waveform Generation with Software Halt, Fault Qualification, Keep and Restart Actions
30.6.3.6 Non Recoverable Faults
The non-recoverable fault action will force all the compare outputs to a pre-defined level programmed into the Driver
Control register (DRVCTRL.NRE and DRVCTRL.NRV). The non recoverable fault input (EV0 and EV1) actions are
enabled in Event Control register (EVCTRL.EVACT0 and EVCTRL.EVACT1). To avoid false fault detection on external
events (e.g. a glitch on an I/O port) a digital filter can be enabled using Non-Recoverable Fault Input x Filter Value bits in
the Driver Control register (DRVCTRL.FILTERVALn). In this case, the event detection is synchronous, and event action
is delayed by the selected digital filter value clock cycles.
Control register (DRVCTRL.NRE and DRVCTRL.NRV). The non recoverable fault input (EV0 and EV1) actions are
enabled in Event Control register (EVCTRL.EVACT0 and EVCTRL.EVACT1). To avoid false fault detection on external
events (e.g. a glitch on an I/O port) a digital filter can be enabled using Non-Recoverable Fault Input x Filter Value bits in
the Driver Control register (DRVCTRL.FILTERVALn). In this case, the event detection is synchronous, and event action
is delayed by the selected digital filter value clock cycles.
KEEP
HALT
COUNT
MAX
TOP
"match"
ZERO
"update"
Fault Input A
CC0
9
-
9
9
-
Fault A Input Qual
-
Software Clear
9
NO
KEEP
9
Restart
Restart
x
x
-
WO[0]