Teach you how to modify the crystal parameters, some F407 platform using 8MHZ crystal 25MHZ. If the mistake will not be able to download the CPU brick

Filename	Size	Update
STM32F407晶振修改\STLINK调试补充教程.pdf	813015	2017-12-10
STM32F407晶振修改\如何从外部晶振为8M的程序移植到外部晶振为25M的程序说明.pdf	153013	2017-12-10
STM32F407晶振修改

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