External oscillator input

[Welcome_123]

In application we are using MCU part no STM32G0KCIU6 of LQFP32 / UFQFPN32 - GP package, can external oscillator of frequency 16MHz (Example: Part no ASEMB-16.000MHZ-LY-T) can be connected to pin no 2 which is dedicated for LSE clock frequency 32KHz. As per datasheet Pin assignment and description list Pin No 2 of MCU has additional options to configure as OSC_IN whether this pin can be configured for HSE requirement? Can external oscillator of frequency 16MHz can be connected to this Pin?

[Welcome_123]

external Crystal oscillator have two pins OSC_IN and OSC_OUT as mentioned OSC_IN will be connected to PC14. suggest which pin can i connect OSC_OUT

[SofLit · Accepted solution]

With Crystal oscillator you need to use only OSC_IN  and in this package only OSC_IN is available:

So you need to use a Crystal oscillator not a Crystal/resonator.

Example: https://sourcewell.in/product/crystal-oscillators/

Hope it does answer your question.

[Andrew Neil]

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@Welcome_123 wrote:

suggest which pin can i connect OSC_OUT

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When you're using an external oscillator, you bypass the STM32's internal oscillator.

The OSC_OUT or OSC32_OUT pin then becomes available as GPIO

See the Reference Manual:

https://www.st.com/resource/en/reference_manual/rm0444-stm32g0x1-advanced-armbased-32bit-mcus-stmicroelectronics.pdf#page=168

[Welcome_123]

can ST suggest 48MHz Crystal oscillator for this application

[SofLit]

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@Welcome_123 wrote:

can ST suggest 48MHz Crystal oscillator for this application

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You need a crystal oscillator powered with VDD of your MCU.

[Welcome_123]

yes need a crystal oscillator powered with 3.3V

[Andrew Neil]

You suggested one in your opening post?

[SofLit]

According to its datasheet: