This is for a one off, Herbert.

-----Original Message-----
From: Herbert Graf [mailto:mailinglist@FARCITE.NET]
Sent: Tuesday, 15 April 2003 2:02 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: PCMCIA modem connections


> Hi All
> I would like to use an old pcmcia modem I have to connect to a
> pic. The pic
> will use the modem to dial a phone number. I have this already
> working with
> a normal serial modem but would prefer to use the pc card because of its
> size.
>
> Does anyone know what pin numbers to use on the card or how to communicate
> with the card at all? I have done a small search and come up with some
> standards that are gobblygook to me.

        Think many I/Os. The PCMCIA interface is a pretty simple 16bit
interface
(with 32bit extensions in the CARDBUS format, but you don't need that).
Pretty simple from a bus protocol perspective, pretty hairy for an
"interface it to a PIC" perspective. I don't know the bus protocol offhand
but I seem to recall it being pretty basic. I'd seriously rethink this
approach if at all possible. If an external serial modem is definitely too
big there are modem chips and modules out there that are dead simple to
interface. Is this a one off or for production? TTYL

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