Hi Joe,

On 19/12/2011 3.04, IVP wrote:
> Hi all,
>
> Supplementary issue - some cards do not appear to provide the
> 0xfe token to show that that data is available. I suspect this might
> be because of the value of the pull-up on DI. Presently I have 47k
>
> There is a final 0xff before data appears. The delay between request
> and that final 0xff looks about right (500us) but because the PIC is
> waiting for 0xfe, the data following isn't read into RAM. Does anyone
> have an opinion on whether the pull-up would be the cause and if so
> what would be a more reliable value ? Could experiment but time for
> only one problem at a time today
I think that SD is outside the standard. You time is, a lot, more valuable =
so...=20
throw it away and search for another!
Bye
     Nic


--=20
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