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STM32L476JE Datasheet(PDF) 39 Page - STMicroelectronics

Part # STM32L476JE
Description  Ultra-low-power ARM® Cortex®-M4 32-bit MCUFPU, 100DMIPS, up to 1MB Flash, 128 KB SRAM, USB OTG FS, LCD, analog, audio
PDF  232 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L476JE Datasheet(HTML) 39 Page - STMicroelectronics

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STM32L476xx
Functional overview
55
•
Noise-wave generation
•
Triangular-wave generation
•
Dual DAC channel independent or simultaneous conversions
•
DMA capability for each channel
•
External triggers for conversion
•
Sample and hold low-power mode, with internal or external capacitor
The DAC channels are triggered through the timer update outputs that are also connected
to different DMA channels.
3.17
Voltage reference buffer (VREFBUF)
The STM32L476xx devices embed an voltage reference buffer which can be used as
voltage reference for ADCs, DACs and also as voltage reference for external components
through the VREF+ pin.
The internal voltage reference buffer supports two voltages:
•
2.048 V
•
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.
3.18
Comparators (COMP)
The STM32L476xx devices embed two rail-to-rail comparators 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).
All comparators can wake up from Stop mode, generate interrupts and breaks for the timers
and can be also combined into a window comparator.



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