Does SWI line effect update or restore process
In itunes updater log I noticed update_SWI error ,Does that mean an update for bqXXXX fuel gauge IC included in major process
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This is a belated answer so hopefully it can be of use to folks who search for and find this question.
The SWI line (single-wire interface) is the nomenclature that apple uses. You'll note that the TIGRIS IC refers to the HDQ pins (High Speed Data Queue). Essentially it is a one-wire interface for communicating with the battery. There's a great write-up here.
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