Host interface for SIM card

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JC - 05 Dec 2005 12:18 GMT

Hi all,

I am studying GSM SIM card.

SIM has five pins: Vcc, GND, Rst, I/O and Clk.
I want to know host status of these ports before host and SIM are
connected together.
In the ISO 7816 spec. I/O is high before communicating each other, so
it seems that there is pull-up in host side, but I can't find the
similar description for other ports in ISO 7816.

Thanks in advance.

JC

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JW - 06 Dec 2005 21:51 GMT

I tried asking somewhat technical questions here with no luck...I think most
of the subscribers here are mostly interested in unlocking and general phone
problems. Good luck...

> Hi all,
>
[quoted text clipped - 10 lines]
>
> JC

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