STM32F372RB datasheet(13/128 Pages) STMICROELECTRONICS

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STM32F37x

Functional overview

Doc ID 022691 Rev 3

13/128

3.3

Embedded Flash memory

All STM32F37x devices feature up to 256 Kbytes of embedded Flash memory available for

storing programs and data. The Flash memory access time is adjusted to the CPU clock

frequency (0 wait state from 0 to 24 MHz, 1 wait state from 24 to 48 MHz and 2 wait states

above).

3.4

Cyclic redundancy check (CRC) calculation unit

The CRC (cyclic redundancy check) calculation unit is used to get a CRC code using a

configurable generator polynomial value and size.

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

linktime and stored at a given memory location.

3.5

Embedded SRAM

All STM32F37x devices feature up to 32 Kbytes of embedded SRAM with hardware parity

check. The memory can be accessed in read/write at CPU clock speed with 0 wait states.

3.6

Boot modes

At startup, Boot0 pin and Boot1 option bit are used to select one of three boot options:

●

Boot from user Flash

●

Boot from system memory

●

Boot from embedded SRAM

The boot loader is located in system memory. It is used to reprogram the Flash memory by

using USART1 (PA9/PA10), USART2 (PD5/PD6) or USB (PA11/PA12) through DFU (device

firmware upgrade).

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