Table Of Contents - Infineon XMC7000 Manual

Clock configuration setup in XMC7000 MCU family

Table of contents

Table of contents
About this document ....................................................................................................................... 1
Table of contents ............................................................................................................................ 2
1 Introduction .......................................................................................................................... 4
2 Clock system for XMC7000 family MCUs .................................................................................... 5
2.1 Overview .................................................................................................................................................. 5
2.2 Clock resources ....................................................................................................................................... 5
2.3 Clock system functions ........................................................................................................................... 6
2.4 Basic clock system settings ................................................................................................................... 12
3 Configuring the clock resources .............................................................................................. 13
3.1 ECO configuration ................................................................................................................................. 13
3.1.1 Use case ............................................................................................................................................ 13
3.1.2 Code preview .................................................................................................................................... 15
3.2 WCO configuration ................................................................................................................................ 16
3.2.1 Overview ........................................................................................................................................... 16
3.3 Setting the IMO ...................................................................................................................................... 17
3.4 Setting ILO0/ILO1 .................................................................................................................................. 17
4 FLL and PLL configuration ...................................................................................................... 18
4.1 Setting the FLL ....................................................................................................................................... 18
4.1.1 Overview ........................................................................................................................................... 18
4.1.2 Use case ............................................................................................................................................ 18
4.1.3 Code preview .................................................................................................................................... 19
4.2 Setting the PLL ...................................................................................................................................... 20
4.2.1 Overview ........................................................................................................................................... 20
4.2.2 Use case ............................................................................................................................................ 20
4.2.3 Code preview .................................................................................................................................... 22
5 Internal clock configuration ................................................................................................... 24
5.1 Configuring CLK_PATHx ........................................................................................................................ 24
5.1.1 Code preview .................................................................................................................................... 25
5.2 Configuring CLK_HFx ............................................................................................................................ 26
5.2.1 Code preview .................................................................................................................................... 27
5.3 Configuring CLK_LF ............................................................................................................................... 27
5.4 Configuring CLK_FAST_0/CLK_FAST_1 ................................................................................................ 28
5.5 Configuring CLK_MEM ........................................................................................................................... 28
5.6 Configuring CLK_PERI ........................................................................................................................... 28
5.7 Configuring CLK_SLOW ......................................................................................................................... 28
5.8 Configuring CLK_GR .............................................................................................................................. 28
5.9 Configuring PCLK................................................................................................................................... 28
5.9.1 PCLK configuration example ........................................................................................................... 30
5.9.1.1 Use case ....................................................................................................................................... 30
5.9.1.2 Configuration .............................................................................................................................. 31
5.9.2 Code preview .................................................................................................................................... 32
5.10 Configuring the ECO Prescaler ............................................................................................................ 33
5.10.1 Overview ........................................................................................................................................... 33
6 Supplementary information ................................................................................................... 34
6.1 Input clocks in peripheral functions ..................................................................................................... 34
6.2 Clock calibration counter function ....................................................................................................... 34
6.2.1 Overview ........................................................................................................................................... 34
Application note 2 002-34253 Rev. *C
2023-11-08