AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 673

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

40.13.9.4
40.13.9.5
40.13.10 Voltage Regulator
40.13.10.1
40.13.10.2
None.
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.
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.
The DCD signal is active at High level in the USART Modem Mode.
DCD should be active at Low level.
Add an inverter.
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.
None.
Maximum load is 50 mA at 85 °C (instead of 100 mA).
Maximum load is 100 mA at 70°C.
None.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
USART: RXBRK Flag Error in Asynchronous Mode
USART: DCD is active High instead of Low
Voltage Regulator: Current Consumption in Deep Mode
Voltage Regulator: Load Versus Temperature
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
673