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MK20DX128VFM5不工作

Question asked by xie anton on Oct 30, 2017
Latest reply on Nov 8, 2017 by Hui_Ma

买了几个MK20DX128VFM5芯片,电路图见附件

将USB插入电脑,没有任何反应,识别不了USB口,

测试如下:

TP3003(VBAT): 0.659V

TP3002(EXTAL32):0V

TP3001(XTAL):0V

TP3012(ADC0):3.3V

GPIO20 GPIO19:0.017V

8MHz 晶振未起震

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