I have just found this thing, how do you think about it?


As you can see that mega2560's pin is connected to side A, but that side is referenced with 3.3V, moreover, dataflash's pin is connected to side B which is referenced to VCC = 5V. that means when B has logic high -> Voltage of B will be 5V, but the apm 2.5.2 still works well. And one more things, why do we need this voltage-level translator while all input of this dataflash are guaranteed by design to be 5V tolerant??

Am I wrong?

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  • noone help me out of this problem?

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