Data Sheet

1029
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
None
39.1.1.11 PTC
1 - WCOMP interrupt flag is not stable. The WCOMP interrupt flag will not
always be set as described in the datasheet. Errata reference: 12860
Fix/Workaround:
Do not use the WCOMP interrupt. Use the WCOMP event.
39.1.2 Revision B
39.1.2.1 Device
1 - On pin PA24 and PA25 the pull-up and pull-down configuration is not
disabled automatically when alternative pin function is enabled. Errata
reference: 12368
Fix/Workaround:
For pin PA24 and PA25, the GPIO pull-up and pull-down must be disabled before
enabling alternative functions on them.
2 - The PDM2 mode (i.e. when using two PDM microphones) does not work.
Errata reference: 13410
Fix/Workaround:
None. Only one PDM microphone can be connected. Thus, the I2S controller
should be configured in normal Receive mode with one slot.
3 - The I2S is non-functional in the slave mode (i.e. when (FSSEL=1,
SCKSEL=1). Errata reference: 13407
Fix/Workaround:
None. FSSEL and SCKSEL must be 0.
4 - If APB clock is stopped and GCLK clock is running, APB read access to
read-synchronized registers will freeze the system. The CPU and the DAP
AHB-AP are stalled, as a consequence debug operation is impossible.
Errata reference: 10416
Fix/Workaround:
Do not make read access to read-synchronized registers when APB clock is
stopped and GCLK is running. To recover from this situation, power cycle the
device or reset the device using the RESETN pin.
5 - In I2C Slave mode, writing the CTRLB register when in the AMATCH or
DRDY interrupt service routines can cause the state machine to reset. Errata
reference: 13574
Fix/Workaround:
Write CTRLB.ACKACT to 0 using the following sequence: