Why different pull up external resistors between GPO2 and nINT are used?
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I apologize for the confusion. The same pull-up value can be used. It has been some time since I did this design but there isn't any reason to have different pull-up values here as long as there is a pull-up on both of those pins. Both INTn and GPIO2 are open drain outputs and require a pull-up to VIO.