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From: Laurent Pinchart <laurentp@cse-semaphore.com>
To: linuxppc-dev@ozlabs.org
Subject: Floating inputs on unused GPIO pins
Date: Mon, 13 Oct 2008 11:56:56 +0200
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Hi everybody,

our hardware engineer asked me to make sure all unused GPIO pins are config=
ured as outputs to avoid floating inputs. He got theory on his side (floati=
ng inputs can lead to higher current consumption, metastability or even per=
manent damage), but I'd like to ask the list for practical feedback.

I haven't been able to find any mention of floating input protection in the=
 MPC8248 documents. Has anyone here experienced issues with floating inputs=
 in real-life designs ? Do you setup your board with all unused GPIO pins c=
onfigured as outputs ?

Best regards,

=2D-=20
Laurent Pinchart
CSE Semaphore Belgium

Chaussee de Bruxelles, 732A
B-1410 Waterloo
Belgium

T +32 (2) 387 42 59
=46 +32 (2) 387 42 75

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