From: Andrew Jamieson <ajamiesn_at_mira.net>
Date: Wed, 12 Dec 2001 12:16:18 +1100

The line in on the ABJ goes directly to the input of the MAS3550 ... which
is really only an amplifier and channel selector. These ports on the 3550
are designed to take an input from another audio source (such as a radio
tuner, CD player, tape, etc), and allow the MAS to do the switching between
them, so you can have an MP3 player with built in radio, etc. Therefore, it
is not possible for the input to be encoded, as it is not 'visible' to
either the CPU (which could possibly encode an input), nor the MAS 3507,
which cannot (it has no A/D input).

HOWEVER: I have just remebered all the A/D lines from the uP that head off
_somewhere_ .... these could go to the inputs aswell. Ahhhhhhh .....

Finally got my new multimeter, so a buzzing I will go. Should have a more
accurate schematic by tomorrow.


CM

PS: About the ISD datasheets; the company was recently acquired by Cypress,
and you seem to need to contact them about datasheets .... I plan to do that
today too ... FYI, here is the email from ISD:

-------------------------------< cut in
email>-----------------------------------

Thank you for contacting us with your question.

In-System Design was recently acquired by Cypress Semiconductor. As a
result, all new sales and marketing duties are being handled through
Cypress' worldwide network of representatives. To locate the nearest
Cypress representative, please go to
http://www.cypress.com/contacts/offices/index.html and follow the
instructions.

Thank you again for contacting us.

Greg Reynolds
Applications Engineer
Cypress Semiconductor
usbapps_at_cypress.com

-----Original Message-----

***************************************************
This is an automated message from the ISD webserver
***************************************************

The below information was given as part of the FEEDBACK form
Phone:
Name: Andrew Jamieson
Reply-to-email: ajamiesn_at_mira.net
=============== START MESSAGE =====================

Hello,

I am a contract engineer who requires a USB - ATA solution for a client
project. I would like to evaluate the ISD-200 for this purpose, but cannot
find a link to the datasheet on your website. Could you proivde me with
this data so that I can determine if this chip is suitable?

Thank you in advance,

Andrew Jamieson

-------------------------------< cut out
email>-----------------------------------
Received on 2001-12-12