68300

Hi,
I am a newcomer in this group and also a beginner in the 68000 series
microcontrollers. I am looking forward to using the 68332.
I am looking for some projects to get started, Is it possible to
interface 68332 to standard SDRAM module/s. knowing that the tRC min
is approx 80ns. Also i need to shift logic from 5V(68332) to 3.3V (SDRAM) 
I'll appreciate if i can get any kind of information to get started.

Shyam

If you are starting out with a new project, you might want to think 
twice about using the 68332.  I am using part MC68332GCFC16 and it 
allegedly has an expected life of only 2 years.  I have heard rumors 
the CPU32 core is being phased out.

Please, can anyone confirm the 68332 is being phased out, expected 
life, etc.?  I am hoping what I have heard is baseless rumors.

--- In 68300@yahoogroups.com, "shyam_mali" <shyam_mali@y...> wrote:
> Hi,
> I am a newcomer in this group and also a beginner in the 68000 
series
> microcontrollers. I am looking forward to using the 68332.
> I am looking for some projects to get started, Is it possible to
> interface 68332 to standard SDRAM module/s. knowing that the tRC min
> is approx 80ns. Also i need to shift logic from 5V(68332) to 3.3V 
(SDRAM) 

> I'll appreciate if i can get any kind of information to get started.
> 
> Shyam

Below is the answer which I got from Motorola when I asked them the same 
question recently ( the E20 refers to one of the 68332 chips ) :



Dear Robert Layton,

Thank you for your interest in Motorola Semiconductors and for the opportunity to serve you.

Please see the notes below for information on how to contact us in regard to this message.




At this time we do not have plans to discontinue the E20. It is an active part. 

I hope this answers your question, if not, please let us know. 

Thank you for contacting Motorola and have a good day!

Regards,
Nina
Technical Support Analyst

Shyam,

The MC68332 is a good part to use.  What you might want to do is get with a distributor and get a particular part number and then get the distributor to get you a quote from the factory.

As an aside here, there are 16, 20 and 25 MHz parts.  Get the 25 MHz version because the 16's and 20's might very well be discontinued.  the 25 Mhz version is exactly the same die and tested the same way.  Motorola (my employer) likes to get rid of as many part numbers as they can and since almost all die meet the 25 MHz specs, they said why not just sell the 25 MHz part.

This is why you here gossip about them discontinuing parts in the CPU32 line when in fact they are only consolidating the slower part numbers into a faster part number.

So, you might want to look at the MC68332ACFC25.  The "A" is automotive TPU code.  A "G" is motion control TPU code.  The "C" is 85 degree part, the "FC" is the package type and the "25" is for 25 MHz.

We used to make a 3 volt version of the MC68332.  I don't think we offer it anymore because sales were almost non-existant.  If you like to take chances, you can probably get the part to work at 3.3 volts but if you do, it is up to you to make sure it totally works there.  As I remember, the part would work up to about 16 MHz at 3.3 volts but this is something I am recalling from memory.

regards,

Charlie

-----Original Message-----
From: shyam_mali [mailto:shyam_mali@...]
Sent: Monday, April 07, 2003 12:55 PM
To: 68300@yahoogroups.com
Subject: [68300] 68332 SDRAM interface


Hi,
I am a newcomer in this group and also a beginner in the 68000 series
microcontrollers. I am looking forward to using the 68332.
I am looking for some projects to get started, Is it possible to
interface 68332 to standard SDRAM module/s. knowing that the tRC min
is approx 80ns. Also i need to shift logic from 5V(68332) to 3.3V (SDRAM) 
I'll appreciate if i can get any kind of information to get started.

Shyam




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