STM32G031F6 datasheet(15/117 Pages) STMICROELECTRONICS

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DS12992 Rev 2

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STM32G031x4/x6/x8

Functional overview

3.4

Embedded SRAM

STM32G031x4/x6/x8 devices have 8 Kbytes of embedded SRAM with parity. Hardware

parity check allows memory data errors to be detected, which contributes to increasing

functional safety of applications.

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

3.5

Boot modes

At startup, the boot pin and boot selector option bit are used to select one of the three boot

options:

•

boot from User Flash memory

•

boot from System memory

•

boot from embedded SRAM

The boot pin is shared with a standard GPIO and can be enabled through the boot selector

option bit. The boot loader is located in System memory. It manages the Flash memory

reprogramming through USART on pins PA9/PA10 or PA2/PA3, or through I2C-bus on pins

PB6/PB7 or PB10/PB11.

3.6

Cyclic redundancy check calculation unit (CRC)

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 link

time and stored at a given memory location.

3.7

Power supply management

3.7.1

Power supply schemes

The STM32G031x4/x6/x8 devices require a 1.7 V to 3.6 V operating supply voltage (VDD).

Several different power supplies are provided to specific peripherals:

•

VDD = 1.7 (1.6) to 3.6 V

VDD is the external power supply for the internal regulator and the system analog such

as reset, power management and internal clocks. It is provided externally through

VDD/VDDA pin.

The minimum voltage of 1.7 V corresponds to power-on reset release threshold

VPOR(max). Once this threshold is crossed and power-on reset is released, the

functionality is guaranteed down to power-down reset threshold VPDR(min).

•

VDDA = 1.62 V (ADC) / 2.4 V (VREFBUF) to 3.6 V

VDDA is the analog power supply for the A/D converter, voltage reference buffer. VDDA

voltage level is identical to VDD voltage as it is provided externally through VDD/VDDA

pin.

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