ATSAM4LS4BA-AU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATSAM4LS4BA-AU

ATSAM ARM-based Flash MCU

Atmel Corporation 

ATSAM4L8/L4/L2

4. Cortex-M4 processor and core peripherals

4.1 Cortex-M4

The Cortex-M4 processor is a high performance 32-bit processor designed for the microcon-

troller market. It offers significant benefits to developers, including:

• outstanding processing performance combined with fast interrupt handling

• enhanced system debug with extensive breakpoint and trace capabilities

• efficient processor core, system and memories

• ultra-low power consumption with integrated sleep modes

• platform security robustness, with integrated memory protection unit (MPU).

Cortex-M4

processor

NVIC

Processor

core

Debug

Access

Port

Memory

protection unit

Serial

Wire

viewer

Flash

patch

Data

watchpoints

Code

interface

Bus matrix

SRAM and

peripheral interface

42023GS–SAM–03/2014

The Cortex-M4 processor is built on a high-performance processor core, with a 3-stage pipeline

Harvard architecture, making it ideal for demanding embedded applications. The processor

delivers exceptional power efficiency through an efficient instruction set and extensively opti-

mized design, providing high-end processing hardware including a range of single-cycle and

SIMD multiplication and multiply-with-accumulate capabilities, saturating arithmetic and dedi-

cated hardware division.

To facilitate the design of cost-sensitive devices, the Cortex-M4 processor implements tightly-

coupled system components that reduce processor area while significantly improving interrupt

handling and system debug capabilities. The Cortex-M4 processor implements a version of the

Thumb® instruction set based on Thumb-2 technology, ensuring high code density and reduced

program memory requirements. The Cortex-M4 instruction set provides the exceptional perfor-

mance expected of a modern 32-bit architecture, with the high code density of 8-bit and 16-bit

microcontrollers.

The Cortex-M4 processor closely integrates a configurable Nested Vectored Interrupt Controller

(NVIC), to deliver industry-leading interrupt performance. The NVIC includes a non-maskable

interrupt (NMI), and provides up to 80 interrupt priority levels. The tight integration of the proces-

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