STM32C011X4 datasheet(13/94 Pages) STMICROELECTRONICS

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DS13866 Rev 3

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STM32C011x4/x6

Functional overview

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 STM32C011x4/x6 devices require a 2.0 V to 3.6 V operating supply voltage (VDD).

Several different power supplies are provided to specific peripherals:

•

VDD = 2.0 (1.96) 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 2.0 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) of 1.96 V.

•

VDDA = 2.0 V (1.96) (ADC) to 3.6 V

VDDA is the analog power supply for the A/D converter. VDDA voltage level is identical to

VDD voltage as it is provided externally through VDD/VDDA pin.

•

VDDIO1 = VDD

VDDIO1 is the power supply for the I/Os. VDDIO1 voltage level is identical to VDD voltage

as it is provided externally through VDD/VDDA pin.

•

VREF+ is the analog peripheral input reference voltage.

VREF+ is internally connected with VDD.

•

VCORE

An embedded linear voltage regulator is used to supply the VCORE internal digital

power. VCORE is the power supply for digital peripherals, SRAM and flash memory. The

flash memory is also supplied with VDD.

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