STM32L475RG datasheet(19/193 Pages) STMICROELECTRONICS

Numer części	STM32L475RG

Szczegółowy opis	Ultra-low-power ARM Cortex-M4 32-bit MCUFPU, 100DMIPS, up to 1MB Flash, 128 KB SRAM, USB OTG FS, analog, audio

PDF	193 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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STM32L475xx

Functional overview

Figure 2. Power supply overview

3.9.2

Power supply supervisor

The device has an integrated ultra-low-power brown-out reset (BOR) active in all modes

except Shutdown and ensuring proper operation after power-on and during power down.

The device remains in reset mode when the monitored supply voltage VDD is below a

specified threshold, without the need for an external reset circuit.

The lowest BOR level is 1.71V at power on, and other higher thresholds can be selected

through option bytes.The device features an embedded programmable voltage detector

(PVD) that monitors the VDD power supply and compares it to the VPVD threshold. An

interrupt can be generated when VDD drops below the VPVD threshold and/or when VDD is

higher than the VPVD threshold. The interrupt service routine can then generate a warning

message and/or put the MCU into a safe state. The PVD is enabled by software.

In addition, the devices embeds a Peripheral Voltage Monitor which compares the

independent supply voltages VDDA, VDDUSB with a fixed threshold in order to ensure that the

peripheral is in its functional supply range.

STM32L475RG Arkusz danych(PDF) 19 Page - STMicroelectronics