Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données
Codes de produits
ATSAMD21-XPRO
998
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
39.3.2 PM
1 - In debug mode, if a watchdog reset occurs, the debug session is lost.
Errata reference: 12196
Errata reference: 12196
Fix/Workaround:
A new debug session must be restart after a watchdog reset.
39.3.3 DFLL48M
1 - The DFLL clock must be requested before being configured otherwise a
write access to a DFLL register can freeze the device. Errata reference: 9905
write access to a DFLL register can freeze the device. Errata reference: 9905
Fix/Workaround:
Write a zero to the DFLL ONDEMAND bit in the DFLLCTRL register before
configuring the DFLL module.
configuring the DFLL module.
2 - If the DFLL48M reaches the maximum or minimum COARSE or FINE
calibration values during the locking sequence, an out of bounds interrupt
will be generated. These interrupts will be generated even if the final
calibration values at DFLL48M lock are not at maximum or minimum, and
might therefore be false out of bounds interrupts. Errata reference: 10669
calibration values during the locking sequence, an out of bounds interrupt
will be generated. These interrupts will be generated even if the final
calibration values at DFLL48M lock are not at maximum or minimum, and
might therefore be false out of bounds interrupts. Errata reference: 10669
Fix/Workaround:
Check that the lockbits: DFLLLCKC and DFLLLCKF in the SYSCTRL Interrupt
Flag Status and Clear register (INTFLAG) are both set before enabling the
DFLLOOB interrupt.
Flag Status and Clear register (INTFLAG) are both set before enabling the
DFLLOOB interrupt.
3 - The DFLL status bits in the PCLKSR register during the USB clock
recovery mode can be wrong after a USB suspend state. Errata reference:
11938
recovery mode can be wrong after a USB suspend state. Errata reference:
11938
Fix/Workaround:
Do not monitor the DFLL status bits in the PCLKSR register during the USB clock
recovery mode.
recovery mode.
39.3.4 NVMCTRL
1 - When the part is secured and EEPROM emulation area configured to
none, the CRC32 is not executed on the entire flash area but up to the on-
chip flash size minus half a row. Errata reference: 11988
none, the CRC32 is not executed on the entire flash area but up to the on-
chip flash size minus half a row. Errata reference: 11988
Fix/Workaround:
When using CRC32 on a protected device with EEPROM emulation area
configured to none, compute the reference CRC32 value to the full chip flash size
minus half row.
configured to none, compute the reference CRC32 value to the full chip flash size
minus half row.
39.3.5 SERCOM
1 - The I2C Slave SCL Low Extend Time-out (CTRLA.SEXTTOEN) and Master
SCL Low Extend Time-out (CTRLA.MEXTTOEN) cannot be used if SCL Low
SCL Low Extend Time-out (CTRLA.MEXTTOEN) cannot be used if SCL Low