Data Sheet

1027
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
39.1.1.8 USB
1 - The FLENC register negative sign management is not correct. Errata
reference: 11472
Fix/Workaround:
The following rule must be used for negative values:
- FLENC 8h is equal to 0 decimal.
- FLENC 9h to Fh are equal to -1 to -7 decimal instead of -7 to -1.
39.1.1.9 TC
1 - Spurious TC overflow and Match/Capture events may occur. Errata
reference: 13268
Fix/Workaround:
Do not use the TC overflow and Match/Capture events. Use the corresponding
Interrupts instead.
39.1.1.10 TCC
1 - The TCC interrupts FAULT1, FAULT0, FAULTB, FAULTA, DFS, ERR,and
CNT cannot wake up the chip from standby mode. Errata reference: 11951
Fix/Workaround:
Do not use the TCC interrupts FAULT1, FAULT0, FAULTB, FAULTA, DFS, ERR,
or CNT to wake up the chip from standby mode.
2 - If the OVF flag in the INTFLAG register is already set when enabling the
DMA, this will trigger an immediate DMA transfer and overwrite the current
buffered value in the TCC register. Errata reference: 12127
Fix/Workaround:
None
3 - In RAMP 2 mode with Fault keep, qualified and restart: Errata reference:
13262
If a fault occurred at the end of the period during the qualified state, the switch to
the next ramp can have two restarts.
Fix/Workaround:
Avoid faults few cycles before the end or the beginning of a ramp.
4 - With blanking enabled, a recoverable fault that occurs during the first
increment of a rising TCC is not blanked. Errata reference: 12519
Fix/Workaround:
None
5 - In Dual slope mode a Retrigger Event does not clear the TCC counter.
Errata reference: 12354