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 [thread overview]
Message-ID: <200810131156.59477.laurentp@cse-semaphore.com> (raw)
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Hi everybody,
our hardware engineer asked me to make sure all unused GPIO pins are configured as outputs to avoid floating inputs. He got theory on his side (floating inputs can lead to higher current consumption, metastability or even permanent 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 configured as outputs ?
Best regards,
--
Laurent Pinchart
CSE Semaphore Belgium
Chaussee de Bruxelles, 732A
B-1410 Waterloo
Belgium
T +32 (2) 387 42 59
F +32 (2) 387 42 75
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next reply other threads:[~2008-10-13 9:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-13 9:56 Laurent Pinchart [this message]
2008-10-13 10:03 ` Floating inputs on unused GPIO pins Geert Uytterhoeven
2008-10-13 11:00 ` Laurent Pinchart
2008-10-13 10:08 ` Leon Woestenberg
2008-10-13 11:04 ` Laurent Pinchart
2008-10-13 11:44 ` Leon Woestenberg
2008-10-13 13:12 ` Bill Gatliff
2008-10-13 13:40 ` Leon Woestenberg
2008-10-28 15:10 ` Laurent Pinchart
2008-10-14 11:07 ` [OT] " Gabriel Paubert
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