STM32F103XC datasheet(15/123 Pages) STMICROELECTRONICS

15 / 123 page

STM32F103xC, STM32F103xD, STM32F103xE

Description

Doc ID 14611 Rev 7

15/123

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, STM32F103xC, STM32F103xD and STM32F103xE

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

Embedded Flash memory

Up to 512 Kbytes of embedded Flash is available for storing programs and data.

2.3.3

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.

2.3.4

Embedded SRAM

Up to 64 Kbytes of embedded SRAM accessed (read/write) at CPU clock speed with 0 wait

states.

2.3.5

FSMC (flexible static memory controller)

The FSMC is embedded in the STM32F103xC, STM32F103xD and STM32F103xE

performance line family. It has four Chip Select outputs supporting the following modes: PC

Card/Compact Flash, SRAM, PSRAM, NOR and NAND.

Functionality overview:

●

The three FSMC interrupt lines are ORed in order to be connected to the NVIC

●

Write FIFO

●

Code execution from external memory except for NAND Flash and PC Card

●

The targeted frequency, fCLK, is HCLK/2, so external access is at 36 MHz when HCLK

is at 72 MHz and external access is at 24 MHz when HCLK is at 48 MHz

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