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这样比较难辨别正品吧,不过一般taobao上二手货翻新多,建议以后从代理商买。如果测试需要几片,可以去申请样品。
对于SPI不通,你需要用示波器去抓出波形,再去对比时序看对不对,找出问题出在哪一步。
确实是IC的问题,在TI官网申请了3个样品测试结果OK,质量非常好!