Opps, grabbed the wrong one. There is a whole series of the migration bulletins. EB380 is for E2 -> E9 EB193 is for A series -> E series Thanks Tony!! Bob Smith Bob Smith wrote: > Robert L. Doerr wrote: > >> At 05:34 PM 3/15/2005 -0500, you wrote: >>> Robert L. Doerr wrote: >>>> Is it possible to substitue a MC68HC711E9 chip in place >>>> of a MC68HC11A1 CPU? >>> >>> Very close, but not quite. There is an engineering bulletin on the >>> Motorola(Freescale) web site on upgrading from the A series to the E >>> series. >>> >>>> If so can it be used as a drop in >>>> replacement by writing the appropriate values to the config >>>> register? >>>> >>>> If not I have a couple MC68HC711E9 chips available if anyone >>>> needs them along with a bunch of XC68HC705 chips. >>> >>> What is the complete part number. I.E., package, temp range, >>> frequency?????????? >> >> Hello Bob, >> >> Thanks for writing back. >> >> The full chip # is MC68HC711E9CFN2 > > OK, thats a good device, widely usable. > > The E9CFN2 decodes to > > Industrial temperature range (-40c to 125c), 2 MHz bus, abd 52 pin > PLCC package. > > (From Table B-1 of the E Series Technical Data Manual). > and it is the same PLCC >> form factor as the 68HC11A1 chips I have used in the past. The >> boards I have use a 8mhz crystal which is divided down to 2Mhz. >> These are going to be used in a robot project for around the house >> so I think that most of the temperature ranges should work ok. >> >> If the 68HC11 family I have really only worked with the 68HC11A1 >> chip and it has been a great CPU to use. I thought that if I could >> just write a new config vaue to the CPU then it might work as a >> replacement for the 68HC11A1 chip. > > There is a bit more to it than that. Depending on how you use Port A > pins, you may have to make some changes to your initialization code > also. And there are a few other small details to be considered. > > Fortunately, Motorola wrote an Engineering Bulletin (EB380) covering > these details. > > Here I looked it up for you ---- > > http://www.freescale.com/files/microcontrollers/doc/eng_bulletin/EB380.pdf > > Just download it, print it and use it. > >> >> At the moment I use them on the HandyBoard computer and on >> a couple of old BotBoard 2 boards. >> >> It might just make more sense for me to offer these MC68HC711E9CFN2 >> chips along with the 68HC705 chips as available to the group. > > Yes, please offer them if you decide to. I will bid on them as I use > the E9CFN2 and one of my embedded control system designs. > > That >> way I'll just stick with the 68HC11A1 chip that I know > > Well thats ok, but I hope you are aware that the A Series has been > obsoleted and is starting to become hard to find. I hope you have a > life time supply of A Series parts on hand. > > You may want to consider offering the A Series parts for sale. You > can probably get more for them than the E9s. > > You should also check with the makers of the Handy Board. Their > support group can probably help you with the migration to the E > Series. > > and not have >> to spend time worrying about the differences within that CPU family. >> I already have too many others to keep tabs on. > > The A Series to E Series migration is almost trivial. Just get the > EB and use the information therein. > > Best wishes, > > Bob Smith > >> >> Best Regards, >> >> Robert >> >> ---------------------------- >> Robert L. Doerr (MCNE, MCSE, A+) >> 26308 Cubberness >> St Clair Shores, MI 48081 >> Tel: (586) 777-1313 >> e-mail: <> >> >> http://www.robotworkshop.com >> http://www.robotswanted.com >> http://www.robotgallery.com >> http://www.homerobots.com >> >> "Keeping Personal Robots alive!" >> >> Expert Robot Repairs and Upgrades available. >> >> Heathkit HERO robots (1, Jr, 2000, & Arm Trainer), Androbots, >> RB5X, Gemini, Hubot, Newton SynPet, MAXX STEELE & others. >> ---------------------------- >> >> >> >> >> >> >> >> >> - - >> ------ Yahoo! Groups Links >> >> a.. To > > --- Avoid computer viruses, Practice safe hex --- > > -- Specializing in small, cost effective > embedded control systems -- > > http://www.smithmachineworks.com/embedprod.html > Robert L. (Bob) Smith > Smith Machine Works, Inc. > 9900 Lumlay Road > Richmond, VA 23236 804/745-2608 > -- ------ > Yahoo! Groups Links > > a.. To --- Avoid computer viruses, Practice safe hex --- -- Specializing in small, cost effective embedded control systems -- http://www.smithmachineworks.com/embedprod.html Robert L. (Bob) Smith Smith Machine Works, Inc. 9900 Lumlay Road Richmond, VA 23236 804/745-2608 |