英飞凌XC2336B单片机外部与内部时钟源的切换——基于DAVE2.1平台

Switching Between External and Internal Clock Source of Infineon XC2336B MCU Based on DAVE2.1 Platform

本文介绍了英飞凌公司XC2336B单片机系统时钟产生单元的结构,以及该部分的重要组成单元——锁相环(PLL)模块。本文还重点描述了,如何在外部晶振失效的情况下,实现单片机外部与内部时钟源的切换。

This paper introduces the structure of clock generating unit of the Infineon Corporation XC2336B MCU and the phase locked loop （PLL） module which is the important part of unit. It also focuses on how to realize the switching between external and internal clock source in case of failure of the external crystal.