SAM7S256_14 Datasheet, PDF (673/775 Pages) ATMEL Corporation – ARM-based Flash MCU

None.
40.13.9.4 USART: RXBRK Flag Error in Asynchronous Mode
In receiver mode, when there are two consecutive characters (without timeguard in between), RXBRK is not taken
into account. As a result, the RXBRK flag is not enabled correctly and the frame error flag is set.
Problem Fix/Workaround
Constraints on the transmitter device connected to the SAM7S USART receiver side:
The transmitter may use the timeguard feature or send two STOP conditions. Only one STOP condition is taken
into account by the receiver state machine. After this STOP condition, as there is no valid data, the receiver state
machine will go in idle mode and enable the RXBRK flag.
40.13.9.5 USART: DCD is active High instead of Low
The DCD signal is active at High level in the USART Modem Mode.
DCD should be active at Low level.
Problem Fix/Workaround
Add an inverter.
40.13.10 Voltage Regulator
40.13.10.1 Voltage Regulator: Current Consumption in Deep Mode
Current consumption in Deep Mode is maximum 60 µA instead of 25 µA.
Due to current rejection from VDDIN to VDDCORE, the current consumption in Deep Mode cannot be guaranteed.
Instead, 60 µA is guaranteed whatever the condition.
Problem Fix/Workaround
None.
40.13.10.2 Voltage Regulator: Load Versus Temperature
Maximum load is 50 mA at 85 °C (instead of 100 mA).
Maximum load is 100 mA at 70°C.
Problem Fix/Workaround
None.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
673