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Regarding the 68HC811-- There used to be a significant hole in Motorola's line-up, as between the 68HC11 product line, and the 68HC12, and a lot of people didn't want to make the jump, me included! However several years have gone by and I think they've done a great deal to close the gap. Especially with the newer MC9S12 family. The budgetary price for a 68HC11E1 is $4.88 for 1K units; this is a part with a 2 MHz E clock in a 52-pin PLCC. It has no program memory, so you have to add an external memory for the programming. If you use a reprogrammable 27E512 from Winbond for program memory, only about $1.00, plus a socket for the Winbond, plus a 74HC373 address latch, you're up to around $6.50 for a 2 MHz microcontroller with external reprogrammable program memory. Or you could use the 68HC711E9 with one-time programmable memory for $7.93 (Motorola budgetary 1K). Haven't used this part for a long time because the above combo is more cost-effective (assuming you have the PCB space and don't mind the expanded bus from an EMC point of view), and because you get to reprogram the Winbond as many times as you like whenever there's a firmware upgrade. If you need the port pins lost by the expanded bus, then you replace the 74HC373 and Winbond with an ST PSD813 (newer version of obsolete PSD913), which provides the port pins, plus a lot of flash memory and extra RAM, and costs around $6.00. Those are the strategies we have used to keep the 68HC11 going. But looking forward, they make less and less sense, with the newer MC9S12 parts. The budgetary price for the MC9S12E64CFU on Motorola's website is $6.20 for 1K units. That unit has 64K of flash memory, and 4K of RAM, and comes in an 80-pin QFP package with a rich collection of peripherals and plenty of port pins, and has a BDM debugging port that reduces the cost of emulation tools. You can get other versions with larger packages and more memory. It runs at 25 MHz bus speed, 12.5 times as fast as the example 68HC11 above. This single chip MC9S12 is far more powerful, and less expensive. The number of us 68HC11 stragglers is continuing to ramp down, and I doubt any semi manufacturer could ever be tempted to come out with a new variation of the 68HC11.... Best regards, Kerry Berland Silicon Engines 2101 Oxford Road 847-803-6860 Fax 847-803-6870 Des Plaines, IL 60018 USA -----Original Message----- From: Tony Papadimitriou [mailto:] Sent: Tuesday, November 18, 2003 10:38 AM To: Subject: Re: [m68HC11] help with the 68hc24 pru ----- Original Message ----- From: "John Samperi" <> To: < > At 08:10 PM 17/11/03 -0500, you wrote: > >It may not be available from Motorola, but production is in full swing at > >TEKMOS. I think they go for about $9 each in hundreds. > > They were very good to me when I blew up my EVM, hc24+++ 24Vdc on the > expanded MPX pins :-(( > > > Now if I could just find someone making the 68HC811 things would be rosy! > > AMEN. I did encourage Tekmos to make them too, perhaps if enough of > us pester them...... Ditto! (Are we enough yet?) > John Samperi To unsubscribe from this group, send an email to:

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