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

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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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