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STM32U545NET3QTR 데이터시트(PDF) 62 Page - STMicroelectronics

부품명 STM32U545NET3QTR
상세설명  Ultra-low-power Arm® Cortex®-M33 MCUTrustZone®FPU,240 DMIPS, 512 KB flash memory, 274 KB SRAM, crypto
PDF  283 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STM32U545NET3QTR 데이터시트(HTML) 62 Page - STMicroelectronics

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Functional overview
STM32U545xx
62/283
DS14216 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



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