STM32F303 Crystal and Boot pin

[bsuthar]

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 ?

 

[KnarfB]

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

[bsuthar]

Thank you , KnarfB

That is Helpful.

About Reset Pin in AN4206 ( Page 31) , NRST pin is not Connected to 3.3V , it is left Floating with Capacitor.

Is that Okay ? 

Regards,