Datasheet

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SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
Thread-safe
In a multi-tasking environment, thread-safe functions use safeguard mechanisms when accessing shared
resources, to ensure correct operation without the risk of shared access conflicts.
Thumb instruction
One or two halfwords that specify an operation for a processor to perform. Thumb instructions must be halfword-
aligned.
Unaligned
A data item stored at an address that is not divisible by the number of bytes that defines the data size is said to be
unaligned. For example, a word stored at an address that is not divisible by four.
Undefined
Indicates an instruction that generates an Undefined instruction exception.
Unpredictable (UNP)
You cannot rely on the behavior. Unpredictable behavior must not represent security holes. Unpredictable
behavior must not halt or hang the processor, or any parts of the system.
Warm reset
Also known as a core reset. Initializes the majority of the processor excluding the debug controller and debug
logic. This type of reset is useful if you are using the debugging features of a processor.
Word
A 32-bit data item.
Write
Writes are defined as operations that have the semantics of a store. Writes include the Thumb instructions STM,
STR, STRH, STRB, and PUSH.