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A comment on Programming ARM μC in Rust at four different levels of abstraction. Parent comment

Re:Programming ARM μC in Rust at four different levels of ab... by InitialLastName on Thursday February 22, 2018 @11:19AM (#16438639)
As mentioned above, in some uC's the output register defines the pull direction when the pin is an input.

In other cases, you want to avoid glitching when the pin switches to an output on startup.

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