STM32F303VB datasheet(17/133 Pages) STMICROELECTRONICS

Teilenummer	STM32F303VB

Bauteilbeschribung	ARM Cortex-M4F 32b MCUFPU, up to 256KB Flash48KB SRAM

PDF	133 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 133 page

STM32F302xx/STM32F303xx

Functional overview

Doc ID 023353 Rev 5

17/133

3.8

Clocks and startup

System clock selection is performed on startup, however the internal RC 8 MHz oscillator is

selected as default CPU clock on reset. An external 4-32 MHz clock can be selected, in

which case it is monitored for failure. If failure is detected, the system automatically switches

back to the internal RC oscillator. A software interrupt is generated if enabled. Similarly, full

interrupt management of the PLL clock entry is available when necessary (for example with

failure of an indirectly used external oscillator).

Several prescalers allow to configure the AHB frequency, the high speed APB (APB2) and

the low speed APB (APB1) domains. The maximum frequency of the AHB and the high

speed APB domains is 72 MHz, while the maximum allowed frequency of the low speed

APB domain is 36 MHz.

STM32F303VB Datenblatt(PDF) 17 Page - STMicroelectronics