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STM32G474CB bảng dữ liệu(PDF) 26 Page - STMicroelectronics

tên linh kiện STM32G474CB
Giải thích chi tiết về linh kiện  Arm® Cortex®-M4 32-bit MCUFPU, 170 MHz / 213 DMIPS, 128 KB SRAM, rich analog, math acc, 184 ps 12 chan Hi-res timer
PDF  236 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32G474CB bảng dữ liệu(HTML) 26 Page - STMicroelectronics

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Functional overview
STM32G474xB STM32G474xC STM32G474xE
26/236
DS12288 Rev 4
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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