Mikroelektronika MikroE Development Kits MIKROE-1104 Data Sheet

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The STM32F20x devices embed a 128-bit wide Flash memory of 128 Kbytes, 256 Kbytes, 
512 Kbytes, 768 Kbytes or 1 Mbytes available for storing programs and data. 

The devices also feature 512 bytes of OTP memory that can be used to store critical user 
data such as Ethernet MAC addresses or cryptographic keys. 

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.

All STM32F20x products embed:
•

Up to 128 Kbytes of system SRAM accessed (read/write) at CPU clock speed with 0 
wait states

•

4 Kbytes of backup SRAM.
The content of this area is protected against possible unwanted write accesses, and is 
retained in Standby or V

BAT 

mode.

The 32-bit multi-AHB bus matrix interconnects all the masters (CPU, DMAs, Ethernet, USB 
HS) and the slaves (Flash memory, RAM, FSMC, AHB and APB peripherals) and ensures a 
seamless and efficient operation even when several high-speed peripherals work 
simultaneously.