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STR71X CLOCK CONFIGURATIONS EASY SETUP

1.2 CDU

This calculation sheet is used to configure the working clock frequency for the CPU, the APB1

and the APB2.

Figure 2. CDU calculation sheet

Just select the required Prescaler and obtain as a result the MCLK, the PCLK1 and the PCLK2

working frequency values.

As an example, as shown in Figure 2, the Prescaler for CPU & memory is set to 1, the Pres-

caler for the APB1 peripherals is set to 2 and the Prescaler for the APB2 peripherals is set to

4. This configuration allows the MCLK to be set to 40MHz, the PCLK1 to 20 MHz and the

PCLK2 to 10MHz.