Datasheet

1176
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
46.2 Errata SAM4S4/S2 Rev. A Parts
The errata are applicable to the devices in Table 46-2.
46.2.1 Flash Controller
46.2.1.1 EFC: Erase Sector (ES) command cannot be performed if a subsector is locked (ONLY in Flash sector 0)
If one of the subsectors
 small sector 0
 small sector 1
 larger sector
is locked within the Flash sector 0, the erase sector (ES) command cannot be processed on non-locked subsectors.
Refer to the Flash overview in the “Memories” section of the datasheet.
Fix/Workaround
All the lock bits of the sector 0 must be cleared prior to issuing the ES command. After the ES command has been
issued, the lock bits must be reverted to the state before clearing them.
46.2.2 Brownout Detector
46.2.2.1 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.
Problem Fix/Workaround
When the Brownout Detector is disabled in active or in wait mode, VDDCORE always needs to be powered.
Table 46-2. Device List for Errata Described in Section 46.2
Device Name Chip ID
SAM4S4C (Rev A) 0x28AB_09E0
SAM4S4B (Rev A) 0x289B_09E0
SAM4S4A (Rev A) 0x288B_09E0
SAM4S2C (Rev A) 0x28AB_07E0
SAM4S2B (Rev A) 0x289B_07E0
SAM4S2A (Rev A) 0x288B_07E0