[time-nuts] favorite microcontroller module?

[Didier Juges]

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Chuck Harris
> Sent: Wednesday, February 20, 2008 8:12 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] favorite microcontroller module?
> 
> Bob Paddock wrote:
> > On Wednesday 20 February 2008 11:53:23 am Chuck Harris wrote:
> > 
> >> I doubt it, the audience of these two devices is quite different.
> >> The 6805 family could address 64K external RAM/ROM/IO. 
> > 
> > Not sure what device you are describing, but it is not a 6805.
> 
> I had thought it did, but looking on google it appears that 
> it has a fixed RAM and ROM space... rather capacious compared 
> to my usual needs.
> 

There was ONE variant of the 68HC05, the original CMOS (as opposed to the
NMOS 6805) which had an external address and data bus. It came in a 40 pin
DIP package. I never used it but I saw it in equipment I was working with at
the time. It had a few instructions that the NMOS parts did not have, but it
was supplanted by the HC05.

Didier KO4BB

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