Functional overview
STM32F031x4 STM32F031x6
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DocID025743 Rev 3
3 Functional
overview
3.1 ARM
®
-Cortex
®
-M0 core with embedded Flash and SRAM
The ARM
®
Cortex
®
-M0 processor is the latest generation of ARM processors for embedded
systems. It has been 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 system response to interrupts.
The ARM
®
Cortex
®
-M0 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 STM32F0xx family has an embedded ARM core and is therefore compatible with all
ARM tools and software.
shows the general block diagram of the device family.
3.2 Memories
The device has the following features:
4 Kbytes of embedded SRAM accessed (read/write) at CPU clock speed with 0 wait
states and featuring embedded parity checking with exception generation for fail-critical
applications.
The non-volatile memory is divided into two arrays:
–
16 to 32 Kbytes of embedded Flash memory for programs and data
–
Option bytes
The option bytes are used to write-protect the memory (with 4 KB granularity) and/or
readout-protect the whole memory with the following options:
–
Level 0: no readout protection
–
Level 1: memory readout protection, the Flash memory cannot be read from or
written to if either debug features are connected or boot in RAM is selected
–
Level 2: chip readout protection, debug features (Cortex
®
-M0 serial wire) and
boot in RAM selection disabled
3.3 Boot
modes
At startup, the boot pin and boot selector option bit are used to select one of the three boot
options:
Boot from User Flash
Boot from System Memory
Boot from embedded SRAM
The boot loader is located in System Memory. It is used to reprogram the Flash memory
by
using USART on pins PA14/PA15 or PA9/PA10.
微可Vicor——值得信赖的元器件供应商
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021-31660491
微可Vicor——值得信赖的元器件供应商
http://www.vicor.top/
021-31660491