STM32U535NET3QTR datasheet(62/278 Pages) STMICROELECTRONICS

Part #	STM32U535NET3QTR

Description	Ultra-low-power Arm® Cortex®-M33 MCUTrustZone®FPU,240 DMIPS, up to 512 KB flash memory, 274 KB SRAM

PDF	278 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

62 / 278 page

Functional overview

STM32U535xx

62/278

DS14217 Rev 1

3.27

Voltage reference buffer (VREFBUF)

The devices embed a voltage reference buffer that can be used as voltage reference for

ADCs, DACs and also as voltage reference for external components through the

VREF+ pin.

Figure 6. VREFBUF block diagram

The internal voltage reference buffer supports four voltages: 1.5 V, 1.8 V, 2.048 V and 2.5 V.

An external voltage reference can be provided through the VREF+ pin when the internal

voltage reference buffer is off.

The VREF+ pin is double-bonded with VDDA on some packages. In these packages the

internal voltage reference buffer is not available.

3.28

Comparator (COMP)

The devices embed one rail-to-rail comparator with programmable reference voltage

(internal or external), hysteresis and speed (low speed for low power) and with selectable

output polarity.

The reference voltage can be one of the following:

•

External I/O

•

DAC output channels

•

Internal reference voltage or submultiple (1/4, 1/2, 3/4)

The comparator can wake up from Stop 0, Stop 1 and Stop 2 modes, generate interrupts

and breaks for the timers.

MSv64430V2

VREFINT

VREF+

VSSA

STM32U535NET3QTR Datasheet(PDF) 62 Page - STMicroelectronics