25 Aug
2004
25 Aug
'04
3:21 p.m.
Ethan Dicks wrote:
On Wed, Aug 25, 2004 at 03:17:34PM -0400, Roger
Merchberger wrote:
Off hand I think it is pin compatable since it was a 6809 replacement part.
The gota is the hardware designers upgraded the core instruction set to
switch instruction sets from the 'Motorola 6809' to the 'Enhanced 6809'
mode
with a mode changing instuction.Since they had a license to sell only
6809 parts
this information was never documented other than hardware hackers on the
internet.
More information can be found here.
http://www.concentric.net/~Alxevans/index.html
Also, if you're looking for something
"more updated" there's always the
Hitachi 63C09 - it's 4 Mhz, and has more registers, a 16-bit integer
multiply (with a 32-bit result) and clock for clock is faster than the 6809.
Is it pin-compatible with the 6809?
-ethan