ryan@cell.mot.COM (Pat Ryan) (02/21/90)
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
leo@dduck.ctt.bellcore.com (Leo Zvenyatsky) (02/21/90)
>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] /___ </_(_) /__ o | ...bellcore!ctt!leo _ ___ | If any views or opinions are found _// / | in this article, please return to: / _ __ / | Leo Zvenyatsky [(201) 699-3889] /___ </_(_) /__ o | ...bellcore!ctt!leo
sirakide@cell.mot.COM (Dean Sirakides) (02/22/90)
ryan@cell.mot.COM (Pat Ryan) writes: >Does anyone know if Motorola makes a 6809 with an operating frequency >greater then 2Mhz? Yes, Motorola MC68A09 - 6 MHz - or - Motorola MC68B09 - 8 MHz -- Dean Sirakides | Motorola Cellular Group ...uunet!motcid!sirakide | Arlington Heights, IL Of course I speak for myself, not my employer...
dnelson@mthvax.cs.miami.edu (Dru Nelson) (02/22/90)
Hitachi makes the 6309 which will work at 3mhz and uses CMOS. -- %% Dru Nelson %% Miami, FL %% Internet: dnelson@mthvax.cs.miami.edu %%
henry@utzoo.uucp (Henry Spencer) (02/22/90)
In article <1351@hazel13.UUCP> sirakide@cell.mot.COM (Dean Sirakides) writes: >>Does anyone know if Motorola makes a 6809 with an operating frequency >>greater then 2Mhz? > > Yes, Motorola MC68A09 - 6 MHz > - or - Motorola MC68B09 - 8 MHz Uh, isn't this just a little bit of specsmanship? The A and B variants are more usually known as 1.5 MHz and 2 MHz respectively, since that's the bus speed, the standard by which the earlier 6800-family machines were measured. He wants something faster than a B. -- "The N in NFS stands for Not, | Henry Spencer at U of Toronto Zoology or Need, or perhaps Nightmare"| uunet!attcan!utzoo!henry henry@zoo.toronto.edu
craig@oakhill.UUCP (Craig Shaw) (02/24/90)
In article <20158@bellcore.bellcore.com> leo@dduck.UUCP (Leo Zvenyatsky) writes: > >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. Actually, if you include the 68HC11 family in the category of 68XX, Motorola makes at least 1 version of the 68HC11 that is guaranteed to operate to 4 MHz (from -40C to +125C no less). The device I'm familiar with is the 68HC11F1, and it uses non-multiplexed address and data buses. It also provides chip-select outputs for external memories, plus many other nice features. If operating temperatures are limited to around 30C or below, the regular multiplexed-bus HC11's (a long list of part numbers) will definately run at an E-clock rate of 4 MHz. Of course, Motorola does not spec. faster operation over a reduced temperature range. Unfortunately for the original poster, 68HC11's are not 6809 compatible. -- I'M THE NRA. Craig D. Shaw - MCU Systems Design (512)891-2245 Motorola Inc., Austin, TX.