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Sasha Jevtic
07/26/05 14:45
Read: 1881 times
Barrington, Il
USA


 
#98213 - DS89C420 vs. DS89C430/440/450
Responding to: Craig Steiner's previous message
Craig Steiner said:
Jan Waclawek said:
I think the DS89C450 is an upgrade to DS89C420, so isn't it worth ordering these?


Not sure, could be. I originally ordered the DS89C420 because that's what Phillip Gallo was using for his 8051 video experiment. I didn't even bother to look to see if there were better options since the '420 was good enough for what I wanted to eventually play with (and which I still haven't had time to play with).

Regards,
Craig Steiner

The DS89C420 was the first device in Maxim/Dallas' Ultra-High-Speed Microcontroller line. It features 16 KB of flash for code, and ISP, via the bootloader which is in permanent ROM on the device.

The DS89C430, DS89C440, and DS89C450 were introduced later. These devices are very similar to the DS89C420, except that in addition to in system programming via the ROM bootloader, they also support in-application programming (IAP). Thus, it is possible for your own firmware running on the device to modify the code in flash (i.e., while running your own code). I haven't tried this yet. Among these three later devices, the only (nominal) differences between them are the amoung of flash they contain. The '430 has 16 KB, the '440 32 KB, and the '450 64 KB.

--Sasha Jevtic

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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