Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
989
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
39.
Errata
39.1 Revision A
39.1.1 Device
1 - PA24 and PA25 cannot be used as input when configured as GPIO with
continuous sampling (cannot be read by PORT). Errata reference: 12005
continuous sampling (cannot be read by PORT). Errata reference: 12005
Fix/Workaround:
- Use PA24 and PA25 for peripherals or only as output pins.
- Or configure PA31 to PA24 for on-demand sampling (CTRL[31:24] all zeroes)
and access the IN register through the APB (not the IOBUS), to allow waiting for
on-demand sampling.
and access the IN register through the APB (not the IOBUS), to allow waiting for
on-demand sampling.
2 - TCC0/WO[6] on PA16 and TCC0/WO[7] on PA17 are not available. Errata
reference: 11622
reference: 11622
Fix/Workaround:
None
3 - While the internal startup is not completed, PA07 pin is driven low by the
chip. Then as all the other pins it is configured as an High Impedance pin.
Errata reference: 12118
chip. Then as all the other pins it is configured as an High Impedance pin.
Errata reference: 12118
Fix/Workaround:
None
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
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.
stopped and GCLK is running. To recover from this situation, power cycle the
device or reset the device using the RESETN pin.
5 - Digital pin outputs from Timer/Counters, AC (Analog Comparator), GCLK
(Generic Clock Controller), and SERCOM (I2C and SPI) do not change value
during standby sleep mode. Errata reference: 12537
(Generic Clock Controller), and SERCOM (I2C and SPI) do not change value
during standby sleep mode. Errata reference: 12537
Fix/Workaround:
Set the voltage regulator in Normal mode before entering STANDBY sleep mode
in order to keep digital pin output enabled. This is done by setting the RUNSTDBY
bit in the VREG register.
in order to keep digital pin output enabled. This is done by setting the RUNSTDBY
bit in the VREG register.
6 - The I2S is non-functional. Errata reference: 12275
Fix/Workaround: