Fix frequencies in rcc doc example
//! // needed to configure specific peripherals.
//! // Looking at the peripheral function parameters
//! // should give more insight, which peripheral clock is needed.
-//! .pclk1(16.mhz())
-//! .pclk2(16.mhz())
+//! .pclk1(12.mhz())
+//! .pclk2(12.mhz())
//! // Freeze / apply the configuration and setup all clocks
-//! .freeze(&mut flash.acr)
+//! .freeze(&mut flash.acr);
//! # }
-//!
//! ```
+//!
+//! All fields can be omitted and will internally be set to a calculated default.
+//! For more details read the documentation of the [`CFGR`] methods to
+//! find out how to setup the clock.
use crate::pac::{
rcc::{self, cfgr, cfgr2},
