Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données

Codes de produits

ATSAMD21-XPRO

991

Atmel | SMART SAM D21 [DATASHEET]

Atmel-42181C–SAM-D21_Datasheet–07/2014

39.1.4 FDPLL

1 - The lock flag (DPLLSTATUS.LOCK) may clear randomly. When the lock
flag randomly clears, DPLLLCKR and DPLLLCKF interrupts will also trigger,
and the DPLL output is masked. Errata reference: 11791

Fix/Workaround:

Set DPLLCTRLB.LBYPASS to 1 to disable masking of the DPLL output by the
lock status.

2 - FDPLL lock time-out values are different from the parameters in the
datasheet. Errata reference: 12145

Fix/Workaround:

The time-out values are:

- DPLLCTRLB.LTIME[2:0] = 4 : 10ms

- DPLLCTRLB.LTIME[2:0] = 5 : 10ms

- DPLLCTRLB.LTIME[2:0] = 6 : 11ms

- DPLLCTRLB.LTIME[2:0] = 7 : 11ms

39.1.5 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

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.

39.1.6 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
Time-out (CTRLA.LOWTOUT) is disabled. When SCTRLA.LOWTOUT=0, the
GCLK_SERCOM_SLOW is not requested. Errata reference: 12003

Fix/Workaround:

To use the Master or Slave SCL low extend time-outs, enable the SCL Low Time-
out (CTRLA.LOWTOUT=1).

39.1.7 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.