[Ovmsdev] SDCard speeds.

[Mark Webb-Johnson]

Anything since mid 2018 should be fine to go at the higher SD card speed. Before then there were hardware problems. Attached is announcement back then.

The design will limit SD CARD speed, as we have very few free GPIOs and had to keep the interface as simple as possible.

Regards, Mark.

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From: Mark Webb-Johnson <mark at webb-johnson.net>
Subject: [Ovmsdev] SD CARD speed vs cp2102
Date: Thu, 17 May 2018 10:22:49 +0800
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> On 23 Mar 2025, at 11:52?AM, Michael Geddes via OvmsDev <ovmsdev at lists.openvehicles.com> wrote:
> 
> I while ago I was talking about issues with my SDCard, and I've just had a friend have some similar issues.  Both these issues were fixed with setting the max frequency to 15MHz
> config set sdcard maxfreq.khz 15000
> 
> This does end up making things a bit slower, but at least it works.  The reported max of my card is 25Mhz.  I'm concerned that the default is misbehaving. Is this a software issue? or is it a hardware issue?
> 
> //.ichael
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