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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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STM32F732IE Datenblatt(PDF) 36 Page - STMicroelectronics |
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STM32F732IE Datenblatt(HTML) 36 Page - STMicroelectronics |
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36 / 226 page  Functional overview STM32F732xx STM32F733xx 36/226 DS11854 Rev 6 3.19 VBAT operation The VBAT pin is used to power the device VBAT domain from an external battery, an external super-capacitor, or from VDD when no external battery and an external super-capacitor are present. The VBAT operation is activated when VDD is not present. The VBAT pin supplies the RTC, the backup registers, and the backup SRAM. Note: When the microcontroller is supplied from VBAT, external interrupts and RTC alarm/events do not exit it from VBAT operation. When the PDR_ON pin is connected to VSS (internal reset OFF), the VBAT functionality is no more available, and the VBAT pin must be connected to VDD. 3.20 Timers and watchdogs The devices include two advanced-control timers, eight general-purpose timers, two basic timers, and two watchdog timers. All timer counters can be frozen in debug mode. Table 6 compares the features of the advanced-control, general-purpose and basic timers. Table 6. Timer feature comparison Timer type Timer Counter resolution Counter type Prescaler factor DMA request generation Capture/ compare channels Complem entary output Max interface clock (MHz) Max timer clock (MHz)(1) Advanced -control TIM1, TIM8 16-bit Up, Down, Up/down Any integer between 1 and 65536 Yes 4 Yes 108 216 |
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