STM32F103RG datasheet(15/120 Pages) STMICROELECTRONICS

15 / 120 page

STM32F103xF, STM32F103xG

Description

Doc ID 16554 Rev 3

15/120

2.3

Overview

2.3.1

ARM® Cortex™-M3 core with embedded Flash and SRAM

The ARM Cortex™-M3 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™-M3 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.

With its embedded ARM core, STM32F103xF and STM32F103xG performance line family

is compatible with all ARM tools and software.

Figure 1 shows the general block diagram of the device family.

2.3.2

Memory protection unit

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.

2.3.3

Embedded Flash memory

768 Kbytes to 1 Mbyte of embedded Flash are available for storing programs and data. The

Flash memory is organized as two banks. The first bank has a size of 512 Kbytes. The

second bank is either 256 or 512 Kbytes depending on the device. This gives the device the

capability of writing to one bank while executing code from the other bank (read-while-write

capability).

2.3.4

CRC (cyclic redundancy check) calculation unit

The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit

data word and a fixed generator polynomial.

Among other applications, CRC-based techniques are used to verify data transmission or

storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of

verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of

the software during runtime, to be compared with a reference signature generated at link-

time and stored at a given memory location.

STM32F103RG 数据表(PDF) 15 Page - STMicroelectronics

STM32F103RG 数据表(HTML) 15 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载