Not quite sure I understand your question. I will not know which voltage
version of SIM is connected so my plan is to start at 1.8v and if I do not
get a valid wake-up response then kick up to 3v, reset and try again then o=
n
to 5v.

I am really looking for an equivalent to LTC1755/LTC1756 either in whole or
in part.


Alan Melia
w: www.melmac.co.uk

-----Original Message-----
From: Yigit Turgut [mailto:y.turgut@gmail.com]=20
Sent: 24 February 2011 21:22
To: Microcontroller discussion list - Public.
Subject: Re: [EE} Sim card interfacing

Which version are you working at ? Different versions have different
specifications, you need to specify more to have a reliable response.

On Thu, Feb 24, 2011 at 10:56 PM, Alan Melia <alanme@melmac.co.uk> wrote:
> Hello,
>
>
>
> I am starting my dissertation this year for my MSc in Forensic Computing
and
> for my subject I have chosen to examine the SIM card used in mobile
devices.
>
>
>
> My plan is to use a PIC to provide the processing unit for the examinatio=
n
> of the data but step one is to establish an interface to the SIM card
which
> is safe both electrically and forensically. =A0The forensic bit I can dea=
l
> with but my electronics is rusty, at best, so I am hoping that someone
might
> be able to give me some pointers as to the best way to interface to the
SIM
> card taking into account that the SIM card standard provides for power of
> 1.8v, 3v and 5v. =A0Add to that the spec seems to indicate something like
> crude diagram below.
>
>
>
>
>
> VDD ----+------
>
> =A0 =A0 =A0 =A0|
>
> =A0 =A0 =A0 | |
>
> =A0 =A0 =A0 |R|
>
> =A0 =A0 =A0 |1| =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0--------------=
-----------------
>
> =A0 =A0 =A0 | | =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0|
>
> =A0 =A0 =A0 =A0| =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 | =A0 Card
>
> I/O ----+--------------------------------------+--
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0 =A0|
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0 =A0c
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0|/
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0data =
-b---|
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0|\
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0 =A0e
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0 =A0 =
=A0 =A0 =A0 =A0 =A0|
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0| =A0GND =
=A0 =A0-----+-----
>
>
>
>
>
> Any assistance would be greatly appreciated.
>
>
>
> Alan Melia
>
> w: =A0<http://www.melmac.co.uk> www.melmac.co.uk
>
> --
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> View/change your membership options at
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>





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