[MinnowBoard] What is the IO voltage on the low-speed connector for the MinnowBoard MAX?

Peter Wieland peterwie at microsoft.com
Tue Sep 2 08:14:52 UTC 2014

Thanks Dave. That's going to make things easier.


Sent from my Windows Phone
From: David Anders<mailto:danders at circuitco.com>
Sent: ‎9/‎1/‎2014 6:03 PM
To: MinnowBoard Development and Community Discussion<mailto:elinux-minnowboard at lists.elinux.org>; Peter Wieland<mailto:peterwie at microsoft.com>
Subject: Re: [MinnowBoard] What is the IO voltage on the low-speed connector for the MinnowBoard MAX?


> On September 1, 2014 at 5:38 PM Peter Wieland <peterwie at microsoft.com> wrote:
> I've been scouring the e-linux wiki and the mb.org pages and can't find
> anything to confirm whether the I/O voltage on the low-speed connector is 1.8V
> or 3.3V.  I was thinking it was 1.8, but I noticed there's a 3.3V reference
> pin but no 1.8V reference pin and so I'm hoping that's because it's running at
> 3.3V.

the base i/o voltage on the Baytrail-I processor is 1.8V, however knowing that
most of the low speed devices that people/makers would want to use with on the
Low Speed Expansion, we included level shifters onboard. all of the i/o on the
LSE is at 3.3V.

Thank you for bringing this question up. i've add a note on the Low Speed
Expansion section of the wiki page:



> -p
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