STM32F479AI datasheet(20/208 Pages) STMICROELECTRONICS

20 / 208 page

Functional overview

STM32F479xx

20/208

DocID028010 Rev 2

2.4

Embedded Flash memory

The devices embed a Flash memory of up to 2 Mbytes available for storing programs and

data.

2.5

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 software

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

and stored at a given memory location.

2.6

Embedded SRAM

All devices embed:

•

Up to 384Kbytes of system SRAM including 64 Kbytes of CCM (core coupled memory)

data RAM

RAM memory is accessed (read/write) at CPU clock speed with 0 wait states.

•

4 Kbytes of backup SRAM

This area is accessible only from the CPU. Its content is protected against possible

unwanted write accesses, and is retained in Standby or VBAT mode.

2.7

Multi-AHB bus matrix

The 32-bit multi-AHB bus matrix interconnects all the masters (CPU, DMAs, Ethernet, USB

HS, LCD-TFT, and DMA2D) and the slaves (Flash memory, RAM, FMC, QUADSPI, AHB

and APB peripherals) and ensures a seamless and efficient operation even when several

high-speed peripherals work simultaneously.

STM32F479AI 数据表(PDF) 20 Page - STMicroelectronics