STM32F303XD datasheet(16/173 Pages) STMICROELECTRONICS

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Functional overview

STM32F303xD STM32F303xE

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DocID026415 Rev 5

Functional overview

3.1

ARM® Cortex®-M4 core with FPU with embedded Flash and

SRAM

The ARM® Cortex®-M4 processor with FPU is the latest generation of ARM processors for

embedded systems. It was developed to provide a low-cost platform that meets the needs of

MCU implementation, with a reduced pin count and low-power consumption, while

delivering outstanding computational performance and an advanced response to interrupts.

The ARM® Cortex®-M4 32-bit RISC processor with FPU features exceptional code-

efficiency, delivering the high-performance expected from an ARM core in the memory size

usually associated with 8- and 16-bit devices.

The processor supports a set of DSP instructions which allows efficient signal processing

and complex algorithm execution.

Its single precision FPU speeds up software development by using metalanguage

development tools, while avoiding saturation.

With its embedded ARM core, the STM32F303xD/E family is compatible with all ARM tools

and software.

Figure 1 shows the general block diagram of the STM32F303xD/E family devices.

3.2

Memory protection unit (MPU)

The memory protection unit (MPU) is used to separate the processing of tasks from the data

protection. The MPU manage up to 8 protection areas that are further divided up into 8

subareas. The protection area sizes are between 32 bytes and the whole 4 gigabytes of

addressable memory.

The memory protection unit is especially helpful for applications where some critical or

certified code has to be protected against the misbehavior of other tasks. It is usually

managed by an RTOS (real-time operating system). If a program accesses a memory

location that is prohibited by the MPU, the RTOS detects it and takes action. In an RTOS

environment, the kernel dynamically updates the MPU area setting, based on the process to

be executed.

The MPU is optional and can be bypassed for applications that do not need it.

3.3

Embedded Flash memory

All STM32F303xD/E devices feature 384/512 Kbyte of embedded Flash memory available

for storing programs and data. The Flash memory access time is adjusted to the CPU clock

frequency (0 wait state from 0 to 24 MHz, 1 wait state from 24 to 48 MHz and 2 wait states

above).

STM32F303XD Datasheet(PDF) 16 Page - STMicroelectronics