STSPIN32F0 datasheet(25/40 Pages) STMICROELECTRONICS

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STSPIN32F0

Device description

6.6

Microcontroller unit

The integrated MCU is the STM32F031C6 with following main characteristics:



Core: ARM® 32-bit Cortex

™-M0 CPU, frequency up to 48 MHz



Memories: 4kB of SRAM, 32 kB of Flash memory



CRC calculation unit



Up to 16 fast I/Os



Advanced-control timer dedicated for PWM generation



Up to 5 general purpose timers



12-bit ADC (up to 9 channels)



Communication interfaces: I2C, USART, SPI



Serial wire debug (SWD)



Extended temperature range: -40 to 125 °C

For more details refer to the STM32F031C6 datasheet on www.st.com

6.6.1

Memories and boot mode

The device has the following features:



4 Kbytes of the embedded SRAM accessed (read/write) at CPU clock speed with 0

wait states and featuring embedded parity checking with an exception generation for

fail-critical applications.



The non-volatile memory is divided into two arrays:

–

32 Kbytes of the embedded Flash memory for programs and data

–

Option bytes

The option bytes are used to write-protect the memory (with 4 KB granularity) and/or

readout-protect the whole memory with the following options:

–

Level 0: no readout protection

–

Level 1: memory readout protection, the Flash memory cannot be read from or

written to if either debug features are connected or the boot in the RAM is selected

–

Level 2: chip readout protection, debug features (Cortex-M0 serial wire) and the

boot in the RAM selection disabled.

At the startup the boot is made from the main Flash memory due to the BOOT0 MCU input

internally connected to ground (see Table 7 on page 15). The main Flash memory is aliased

in the boot memory space (0x00000000), but still accessible from its original memory space

(0x08000000). In other words, the Flash memory contents can be accessed starting from

the address 0x00000000 or 0x08000000.

The embedded boot loader is located in the system memory, programmed by ST during

production.

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