AN3311
Getting started with the system
Doc ID 18209 Rev 1
37/58
The clock distribution and the interrupt settings are two components that are strongly
dependent on the target project. An example of clock rate may be 72 MHz as the maximum
speed of the current STM32 microcontroller. It can be decreased to reduce the power
consumption. The clock rate assumptions are:
●
System HCLK - 72 MHz
●
Low speed peripheral PCLK1 - 72 MHz
●
High speed peripheral PCLK2 - 36 MHz
●
Analog to digital converter ADCCLK - 36 MHz
The interrupt setting situation is very similar to clock distribution. The library functions
involved with interrupt managing do not take the priorities into account; they only perform
very necessary and absolutely common settings to make them serviceable.
