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What is the default frequency rate (clock speed) of Peripheral Clock (PCLK) ? How to set the frequency rate (clock speed) of the Peripheral Clock (PCLK) ?
Awaiting for valuable suggestions...
I guess you don't like the processor User Manual. And I guess you also haven't looked at the Configuration Wizard settings for the startup file.
My suggestion: That you consider either spending some time looking at the primary sources of information supplied by the chip manufacturer, or if you should take a day at the beach and ignore this project of yours. The PCLK information isn't exactly hidden in the processor manual.