68300

Phil,

As a matter of interest, almost all of the MC68332 devices will work at 3.3 volts.  However, Motorola does not offer a 3.3 volt selection anymore.  The reason was that it was a very low volume part.

So, you can (at your own risk) just try running the '332 at 3.3 volts.  The first issues you will hit are the oscillator start up time and you may have to jockey around with the XFC filter components.  Probably, all you will need to do is lower the value of the series resistor for the crystal.

Having said that, you are correct in that the 5 volt 68332 has incompatible voltage levels with a 3.3 volt flash.  You are going to have to use some type of voltage interface between the two devices.

Regards,

Charlie

-----Original Message-----
From: development [mailto:development@...]
Sent: Friday, August 06, 2004 5:21 AM
To: 68300@yahoogroups.com
Subject: [68300] Connecting a 3.3 V logic to a 5V logic processor.
Importance: High


Hello All,
      I am using an AT49F8192-90RC(512K * 16) FLASH with the 68332. 
The problem i am facing is that since this part works on 5 V logic, it is 
getting more and more difficult to procure.

       The 3.3 V equivalents are easier to get. Is it possible to connect 
a 3.3 V FLASH device to the 68332 and still be working reliably.

       Is anybody aware if Motorola is coming up with a 3.3 V version of 
the 68332.


Thanks & Regards,
Philip Jones,
Engineer,
R&D Department,
ID Technologies. (A division of mark elektriks)
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