STM32F427XX datasheet(21/239 Pages) STMICROELECTRONICS | ARM Cortex-M4 32b MCU+FPU, 225DMIPS, up to 2MB Flash/256+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 comm. interfaces, camera & LCD-TFT

Part No.	STM32F427XX

Description	ARM Cortex-M4 32b MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 comm. interfaces, camera & LCD-TFT

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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STM32F427xx STM32F429xx

Functional overview

43

3.4

Embedded Flash memory

The devices embed a Flash memory of up to 2 Mbytes 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 256Kbytes 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.

3.7

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, AHB and APB

peripherals) and ensures a seamless and efficient operation even when several high-speed

peripherals work simultaneously.

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STMicroelectronics	STM32F437XX	3Mb / 240P	ARM Cortex-M4 32b MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, crypto, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 comm. interfaces, camera&LCD-TFT
	STM32F446XC	2Mb / 202P	ARM Cortex-M4 32b MCUFPU, 225DMIPS, up to 512kB Flash/1284KB RAM, USB OTG HS/FS, 17 TIMs, 3 ADCs, 20 comm. interfaces
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	STM32F407IGH6	5Mb / 185P	ARM Cortex-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera
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