Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1476
51.
Errata on SAM4E Devices
51.1
Errata
51.1.1 Watchdog
51.1.1.1 Watchdog Not Stopped in Wait Mode
When the Watchdog is enabled and the bit WAITMODE = 1 is used to enter wait mode, the watchdog is not halted.
If the time spent in Wait Mode is longer than the Watchdog time-out, the device will be reset if Watchdog reset is
enabled.
If the time spent in Wait Mode is longer than the Watchdog time-out, the device will be reset if Watchdog reset is
enabled.
Problem Fix/Workaround
When entering Wait mode, the Wait For Event (WFE) instruction of the processor Cortex-M4 must be used with
the SLEEPDEEP of the System Control Register (SCB_SCR) of the Cortex-M = 0.
the SLEEPDEEP of the System Control Register (SCB_SCR) of the Cortex-M = 0.
51.1.2 Brownout Detector
51.1.2.1 Unpredictable Behavior if BOD is Disabled, VDDCORE is Lost and VDDIO is Connected
In Active mode or in Wait mode, if the Brownout Detector is disabled (SUPC_MR: BODDIS=1) and power is lost on
VDDCORE while VDDIO is powered, the device might not be properly reset and may behave unpredictably.
VDDCORE while VDDIO is powered, the device might not be properly reset and may behave unpredictably.
Problem Fix/Workaround
When the Brownout Detector is disabled in Active or in Wait mode, VDDCORE always needs to be powered.