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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/905202/ds90ub947-q1-before-947-power-up-and-initialization-is-it-ok-that-gpio0-3-already-have-signals
大家好、
我的。在加电然后初始化947 μ s 之前、已经将信号发送到947中的 GPIO0-3
请问是否有风险？
谢谢！
您好、Amelie、
GPIO 引脚的绝对最大电压为 VDDIO + 0.3V、因此如果在器件上电之前应用 GPIO、则有损坏器件的风险。
此致、
Casey
