Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!texbell!bellcore!dduck!leo From: leo@dduck.ctt.bellcore.com (Leo Zvenyatsky) Newsgroups: sci.electronics Subject: Re: 6809 greater than 2 Mhz Keywords: 6809 Message-ID: <20158@bellcore.bellcore.com> Date: 21 Feb 90 04:51:43 GMT References: <1344@talc1.UUCP> Sender: news@bellcore.bellcore.com Reply-To: leo@dduck.UUCP (Leo Zvenyatsky) Distribution: sci Organization: Bellcore, Piscataway, NJ Lines: 33 >Does anyone know if Motorola makes a 6809 with an operating frequency >greater then 2Mhz? If not is there another vendor that makes a 6809 >equivalent that runs at an operating frequency greater then 2 Mhz? Any >information would be greatly appreciated. > >Thank You >Pat Ryan As far as I know (and I've worked with 6809's for about five years now), the fastest 6809 version runs at 8Mhz external quadrature clock which translates to 2Mhz internal clock (500 nSec/cycle). Since the fastest instructions take up at least 2 cycles, you wind up with maximum 1 instruction/uSec. This is the fastest in the 68xx family. There are other 68xx clone makers (Hitachi springs to mind), but none, to my knowledge, have anything faster. On the off chance that you do find a faster version, could you please drop me a line over e-mail. Thanks, --- leo -- _ ___ | If any views or opinions are found _// / | in this article, please return to: / _ __ / | Leo Zvenyatsky [(201) 699-3889] /___