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Phillip M Gallo
07/26/05 13:00
Read: 1571 times
Torrance
USA


 
#98198 - Which is exactly what they say ...
Responding to: Jan Waclawek's previous message
Jan,

You are "dead on" as the quote from the web site repeats:

"Worlds Fastest Drop-In 8051 with In-Application Programmable Flash"

I like the DS'4x0 series a lot and have used quite a few of them in products.

Atmel has recently joined the single machine cycle fray with thier "LP" products (a 20MHz '2051 with mostly single cycle execution rate is a killer part).

Noticably, some of the design features of the DS'4x0 demonstrate a better ability as a "drop-in" upgrade as the clocks/timers retaining 12x divider unless you program them to be faster. This means SIO works "out of the box" and if you've kept time critical routines tied to these timers they perform the same (unless a faster code path has implication).

The ISP for the Atmel "LP" parts is not as forgiving as using the DS'4x0 3 wire serial connection (with bootloader) but is a fine alternative to poping out the part and re-flashing it.

The serial programming capability of the DS'420 makes things easy but the MTK program does have it's limits. If you use standard '51 crystal frequencies you don't have to "diddle" the PC uart timing (in the MTK app).

The MSC121x while not being as fast as the DS'4x0's (4x machine cycle) has a very good and frequency tolerant SIO programming capability and is a well concieved, feature rich analog platform. It is not a pin compatible processor, however.

regards,
p


List of 38 messages in thread
TopicAuthorDate
Looking for 80C251 board      Henry Sodens      07/25/05 21:20      
   DS89C450 is fast 8051.      Charles Bannister      07/25/05 22:34      
      Cheap 'n' cheerful      Russell Bull      07/26/05 01:56      
      builtin bootloader      Matthias Arndt      07/26/05 03:05      
         Common place        Steve M. Taylor      07/26/05 05:06      
            good to know      Matthias Arndt      07/26/05 06:45      
               And Texas Instruments        Craig Steiner      07/26/05 06:58      
                  DS89C4x0      Jan Waclawek      07/26/05 07:19      
                     Not sure      Craig Steiner      07/26/05 07:35      
                        DS89C420 vs. DS89C430/440/450      Sasha Jevtic      07/26/05 14:45      
                     You are probably right      Matthias Arndt      07/26/05 09:53      
                  ok      Matthias Arndt      07/26/05 09:55      
            Death of the Programmer        Andy Neil      08/01/05 02:21      
         Yes, it's nice      Sasha Jevtic      07/26/05 14:33      
            comments      Erik Malund      07/26/05 14:42      
      "marketing"      Erik Malund      07/26/05 07:26      
         let's put it this way:      Jan Waclawek      07/26/05 07:46      
            Which is exactly what they say ...      Phillip M Gallo      07/26/05 13:00      
               overview      Jan Waclawek      07/26/05 14:55      
                  DS'420 IAP      Phillip M Gallo      07/26/05 15:03      
                     I'm not polite...      Jan Waclawek      07/26/05 15:31      
                        MAXIM/Dallas and Flash      Phillip M Gallo      07/26/05 16:16      
                           common practice today      Erik Malund      07/26/05 16:23      
                           Nor forgetting      Steve M. Taylor      07/27/05 07:42      
                              DS2250 - Secure Micro      Phillip M Gallo      07/27/05 11:57      
      Very nice and informative      Kai Klaas      07/30/05 05:19      
   Saved a few cents for a lot of work.      Charles Bannister      07/26/05 02:42      
      In-system programming      Sasha Jevtic      07/26/05 14:59      
         ISP Header        Phillip M Gallo      07/30/05 11:31      
      schematics?      Christian Kleiber      07/28/05 00:08      
         if you are looking for schematics of ISP      Erik Malund      07/28/05 05:59      
   Why on earth      Erik Malund      07/26/05 06:30      
   '251 board      Phillip M Gallo      07/26/05 13:10      
   if you decide to leave the '51 (which yo      Erik Malund      07/26/05 13:19      
   8052.com SBC supports DS89C420      Jon Ledbetter      07/27/05 15:23      
   Dead Thread?      Andy Neil      08/01/05 05:03      
NOTICE: Message(s) moved      Craig Steiner      07/30/05 08:40      
   Moving posts      Terry Lingle      07/30/05 10:27      

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