STM32F446VE datasheet(18/201 Pages) STMICROELECTRONICS

18 / 201 page

Functional overview

STM32F446xC/E

18/201

DocID027107 Rev 5

3.4

Embedded Flash memory

The devices embed a Flash memory of 512KB available for storing programs and data.

3.5

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.

3.6

Embedded SRAM

All devices embed:

•

Up to 128Kbytes of system SRAM.

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.

3.7

Multi-AHB bus matrix

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

the slaves Flash memory, RAM, QuadSPI, FMC, AHB and APB peripherals and ensures a

seamless and efficient operation even when several high-speed peripherals work

simultaneously.

STM32F446VE 데이터시트(PDF) 18 Page - STMicroelectronics