.. zephyr:code-sample:: stm32_mco
:name: Master Clock Output (MCO)
:relevant-api: pinctrl_interface
Output an internal clock for external use by the application.
Overview
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This sample is a minimum application to demonstrate how to output one of the internal clocks for
external use by the application.
Requirements
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The SoC should support MCO functionality and use a pin that has the MCO alternate function.
To support another board, add a dts overlay file in boards folder.
Make sure that the output clock is enabled in dts overlay file.
Building and Running
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.. zephyr-app-commands::
:zephyr-app: samples/boards/st/mco
:board: nucleo_u5a5zj_q
:goals: build flash
After flashing, the LSE clock will be output on the MCO pin enabled in Device Tree.
The clock can be observed using a probing device, such as a logic analyzer.
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