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Richard Erlacher
01/16/13 01:50
Modified:
  01/16/13 02:01

Read: 691 times
Denver, Co
USA


 
#189183 - What about that other post?
Responding to: Erik Malund's previous message
http://www.8052.com/forum/read/189102 might be worth a look. That's where he says he's using this chip in a class.

The datasheet explains how to attach and implement external memory. It's clear, however, that he hasn't fully understood that.

Since he's not understood the hardware that he's got ... i.e. that trainer board to which he refers, that's being used in his class, it's unlikely he'll understand this other chip any better, at least until he does a lot more thorough study.

The '320 and the 430 are quite similar, though it's not at all clear what advantage he seeks to derive from the ROMLESS version.

I'm persuaded that he'd have a lot easier time with a DS89C450, of which he can probably beg a sample from Maxim, and which is trivial to wire up, since all it needs is an oscillator and a serial port (e.g. MAX232A) (it has an on-chip voltage monitor/reset-generator) and will need no external memory at all. The '430, of course, has only 16 k-Bytes of on-chip program memory, but is trivial to program without any sort of dedicated programmer, aside from a serial port, which he'll probably need anyway. With a monitor program like that Ultramon51 that I like, he can enter, assemble, disassemble, and debug small pieces of code using the on-chip 1 k-Byte XRAM mapped into both XRAM and code space, which, IIRC, the chip allows.

Maybe you just didn't recognize that the same guy posted both of these queries. Apparently he wants to play with this chip, but can't get his hands on it except in class. The '320 came up because he can lay hands on 'em at work, or somewhere.

As you know, I like these Dallas-designed chips, so I know how to play with 'em.

RE






List of 40 messages in thread
TopicAuthorDate
Regarding Typical memory connection for a ds80c320      James Brzycki      01/13/13 19:39      
   drop it!      Erik Malund      01/13/13 20:10      
   same question - same answers      Andy Neil      01/13/13 23:32      
   It won't work      Andy Neil      01/13/13 23:41      
      Andy Neil's previous message      James Brzycki      01/14/13 06:41      
         little feet stamping the floor      Erik Malund      01/14/13 07:33      
            little feet stamping the floor      James Brzycki      01/14/13 07:45      
               Erik doesn't like it when you don't do what he wants      Richard Erlacher      01/14/13 11:11      
                  KISS      Erik Malund      01/14/13 11:39      
                     Not exactly ...      Richard Erlacher      01/14/13 23:35      
                        I find it odd that you      Erik Malund      01/15/13 09:29      
                           just to add      James Brzycki      01/15/13 11:24      
                              If you really want to use ds80c320      Jim Granville      01/15/13 18:28      
                                 Not necessary ...      Andy Neil      01/15/13 23:31      
                                    What about the other option?      Richard Erlacher      01/16/13 02:00      
                                    Yes, but ..      Jim Granville      01/16/13 12:56      
                              So your development cycle will be...      Andy Neil      01/16/13 01:01      
                           What about that other post?      Richard Erlacher      01/16/13 01:50      
                              reply to all      James Brzycki      01/16/13 14:12      
                                 'something'      Erik Malund      01/16/13 15:16      
                                    "something" reply      James Brzycki      01/16/13 16:35      
                                 Some links to reduce work       Jim Granville      01/16/13 19:11      
                                 I'm not surprised ...       Richard Erlacher      01/17/13 01:06      
                                    down memory lane      Erik Malund      01/17/13 09:38      
                                       Antique chips        Mahmood Elnasser      01/17/13 10:04      
                                          in my opinion      Erik Malund      01/17/13 13:06      
                                             Just where, under the hood, can you look?      Richard Erlacher      01/17/13 21:42      
                                                this applies equally well      Erik Malund      01/17/13 21:52      
                                                   Did he say he wants apples?      Richard Erlacher      01/17/13 21:57      
                                          Highly integrated devices deprive one of valuable experience      Richard Erlacher      01/17/13 21:38      
                                       the only difference ...       Richard Erlacher      01/17/13 12:14      
                                          a monitor can not       Erik Malund      01/17/13 13:09      
                                             I don't think anyone's that foolish ...       Richard Erlacher      01/17/13 21:15      
                                                I do      Erik Malund      01/17/13 21:26      
                                                   He doesn't have to apply external memory      Richard Erlacher      01/17/13 21:55      
                                                      by your posts he does      Erik Malund      01/17/13 22:14      
                                                         You have to consider ALL his posts      Richard Erlacher      01/18/13 11:47      
            The bible links      James Brzycki      01/14/13 07:47      
               you are right      Erik Malund      01/14/13 08:07      
                  Thanks      James Brzycki      01/14/13 08:29      

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