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STM32G474VCU6 Scheda tecnica(PDF) 25 Page - STMicroelectronics

Il numero della parte STM32G474VCU6
Spiegazioni elettronici  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
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32G474VCU6 Scheda tecnica(HTML) 25 Page - STMicroelectronics

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DS12288 Rev 1
25/232
STM32G474xB STM32G474xC STM32G474xE
Functional overview
47
3.11.6
VBAT operation
The VBAT pin allows to power the device VBAT domain from an external battery, an external
supercapacitor, or from VDD when there is no external battery and when an external
supercapacitor is present. The VBAT pin supplies the RTC with LSE and the backup
registers. Three anti-tamper detection pins are available in VBAT mode.
The VBAT operation is automatically activated when VDD is not present. An internal VBAT
battery charging circuit is embedded and can be activated when VDD is present.
Note:
When the microcontroller is supplied from VBAT, neither external interrupts nor RTC
alarm/events exit the microcontroller from the VBAT operation.



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