本来以为直接接个10K的限流电阻应该够了
但是看到INJ电流的 正灌入是0mA, 负灌入是-5mA
Injected current on five-volt tolerant I/O –5/+0 mA
Positive injection is not possible on these I/Os. A negative injection is induced by VIN<VSS. IINJ(PIN) must
never be exceeded. Refer to Table 11 for the values of the maximum allowed input voltage
GPIO不能超过VCC+4V,即使接了限流电阻也会有电流灌入。
那么是在限流电阻后面接一个稳压管还是TVS管呢?
|