Supplementary Information; Input Clocks In Peripheral Functions; Clock Calibration Counter Function; Overview - Infineon XMC7000 Manual

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Clock configuration setup in XMC7000 MCU family

Supplementary information

6.1

You can view the clock inputs for each peripheral function in the System tab of the Device Configurator.

For detailed values of PCLK, see the "Peripheral Clocks" section of the datasheet.

Figure 40

Clock inputs

6.2

6.2.1

The clock calibration counter has two counters that can be used to compare the frequency of two clock

sources. All clock sources are available as a source for these two clocks.

1. Calibration Counter1 counts clock pulses from Calibration Clock1 (the high-accuracy clock used as the

reference clock). Counter1 counts in decreasing order.

2. Calibration Counter2 counts clock pulses from Calibration Clock2 (measurement clock). This counter counts

in increasing order.

3. When Calibration Counter1 reaches 0, Calibration Counter2 stops counting, and its value can be read.

4. The frequency of Calibration Counter2 can be obtained by using the value and the following equation:

��2 =

Figure 41

shows an example of the clock calibration counter function when ILO0 and ECO are used. ILO0 and

ECO must be enabled. See ILO0 and ECO for

Application note

��2��

× ��1

��1��

3.4 Setting ILO0/ILO1

and

3.1

ECO.

002-34253 Rev. *C

2023-11-08

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