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STM32G474CEU7 数据表(PDF) 33 Page - STMicroelectronics

部件名 STM32G474CEU7
功能描述  Arm® Cortex®-M4 32b MCUFPU, up to 512 KB Flash, 170 MHz / 213 DMIPS, 128 KB SRAM, rich analog, math accelerator, 184ps 12ch Hi-res timer
PDF  232 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32G474CEU7 数据表(HTML) 33 Page - STMicroelectronics

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DS12288 Rev 1
33/232
STM32G474xB STM32G474xC STM32G474xE
Functional overview
47
This digital interface supports the following features:
•
Up to two DAC output channels
•
8-bit or 12-bit output mode
•
Buffer offset calibration (factory and user trimming)
•
Left or right data alignment in 12-bit mode
•
Synchronized update capability
•
Noise-wave generation
•
Triangular-wave generation
•
Saw tooth 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
•
Up to 1 Msps for external output and 15 Msps for internal output
The DAC channels are triggered through the timer update outputs that are also connected
to different DMA channels.
3.20
Voltage reference buffer (VREFBUF)
The STM32G474xB/xC/xE devices embed a voltage reference buffer which can be used as
voltage reference for ADC, DACs and also as voltage reference for external components
through the VREF+ pin.
The internal voltage reference buffer supports three voltages:
•
2.048 V
•
2.5 V
•
2.9 V
An external voltage reference can be provided through the VREF+ pin when the internal
voltage reference buffer is off.
Figure 3. Voltage reference buffer



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