STM32F303VC datasheet(13/133 Pages) STMICROELECTRONICS

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STM32F302xx/STM32F303xx

Functional overview

Doc ID 023353 Rev 5

13/133

Functional overview

3.1

ARM® Cortex™-M4F core with embedded Flash and SRAM

The ARM Cortex-M4F processor 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-M4F 32-bit RISC processor 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 allow 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 STM32F302xx/STM32F303xx family is compatible with

all ARM tools and software.

Figure 1 and Figure 2 show the general block diagrams of the

STM32F302xx/STM32F303xx 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 can manage up to 8 protection areas that can all be 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 can detect it and take action. In an RTOS

environment, the kernel can dynamically update 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 STM32F302xx/STM32F303xx devices feature up to 256 Kbytes 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).

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