MEMS asm330 lhh Power-on PIN INT1 setting

[CLiu.2]

Hi!

I'm reading the official asm330lhh datasheet.

There is a sentence "INT1 must be set to '0' or left unconnected during power-on" under Table 17 in Chapter 7. This sentence means that when MEMS is powered on, ensure that INT1 is at 0 level or Does the disconnected state refer to the state before power-on? I drew a simple timing diagram.

A or B?

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can anyone help?

Thanks.

Liu

[Eleon BORLINI]

Hi @CLiu.2​ , it basically means that the INT1 pad must not be at Vdd level during the power on phase (i.e. while the Vdd and VddIO are risen from 0V to VDD level). I believe you will drive this pin with an MCU: the default state of this pin has to be either gnd (0V) or "open drain", at least during the power on phase (so I believe A diagram, just before and just after the Vdd settling). Regards

[CLiu.2]

Thanks!

:）

Liu