STM32F303 Crystal and Boot pin
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‎2025-06-26 8:52 PM
Hello Friends,
Most STM32 based Evolution / Development Board has Crystal 32.768 Khz and Boot switch connected.
In my Custom design board , I do not need RTC Function and Bootloader to load.
8 Mhz Crystal is used for Master Clock.
Can I remove 32.768 khz Crystal and Bootloader Switch from Boot0 pin ?
What should be default level maintain on these pins after removing both ?
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STM32F3 Series
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‎2025-06-26 10:05 PM
The crystal can be omitted, the pins can be left open or used as GPIO pins. BOOT0 should be connected to GND via a 10k current limiting resistor. See AN4206 Application note "Getting started with STM32F3 series hardware development"
hth
KnarfB
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‎2025-06-26 10:05 PM
The crystal can be omitted, the pins can be left open or used as GPIO pins. BOOT0 should be connected to GND via a 10k current limiting resistor. See AN4206 Application note "Getting started with STM32F3 series hardware development"
hth
KnarfB
