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Jan Waclawek
12/11/10 05:45
Read: 562 times
Bratislava
Slovakia


 
#180077 - pinout and compatibility
Responding to: Andy Neil's previous message
The pinout of the M0x is deliberately adjusted to the "biblical" '51 pinout. Look at it: if you cut 4 pins, each in one corner (those belonging to port P4), you'll get the same pinout as the usual QFP44 '51s come in quote for some time, and which is identical to the "biblical" DIP40 pinout rotated by a couple of pins. And we are talking about position of power pins (with some adjustments here and there), xtal pins, dedicated peripherals such as UART and SPI and I2C, and also the structure of general purpose ports! That's quite a difference from the "general" ARM offerings.

You might object that the package size etc. is different so one has to draw a new PCB anyway. Sure; but it's surely simpler when one has only to "shrink" the footprint of a single component, rather than to redesign everything. Also it appears to be simple to design a DIP40 adapter, when it comes to it. Also, Nuvoton offers most of their 12/6-clockers and some of the 4-clockers in a compatible LQFP48 package, and I would not be surprised if there would be other '51s in this package available.

The downside of this all is, that so far I was unable to buy a single Winbond/Nuvoton chip, and I've been trying for quite some time to get some of their LPCs and before that the RD2-equivalent (but the truth is that I was offered samples if I write a dummy project proposal, except I refused to do that as it would not be fair IMO). I also don't know how I would program them.

JW


List of 44 messages in thread
TopicAuthorDate
[ARM] derivative choice      Stefan KAnev      12/09/10 08:18      
   an illusion      Erik Malund      12/09/10 08:44      
      ?      Stefan KAnev      12/09/10 10:25      
         Possibility      Andy Neil      12/09/10 10:34      
            pins and what they are      Erik Malund      12/09/10 11:31      
               the reason to differentiate is...      Jan Waclawek      12/09/10 15:46      
   None?      Andy Neil      12/09/10 09:38      
   There's no PDIP pins      JecksonS Ben      12/09/10 18:21      
   Product upgrade?      Kalpak Dabir      12/09/10 20:16      
      i'm not      Stefan KAnev      12/09/10 22:06      
   Nuvoton NuMicro M051      Valentin Angelovski      12/10/10 17:31      
      Don't see it [Ed]      Andy Neil      12/11/10 03:24      
         You cannot see it? c'mon! ;-)      Valentin Angelovski      12/11/10 04:59      
         pinout and compatibility      Jan Waclawek      12/11/10 05:45      
   arn is not for hobbies      JecksonS Ben      12/12/10 18:11      
      Oh yes it is!      Andy Neil      12/13/10 00:29      
         I didn't type      JecksonS Ben      12/13/10 01:16      
            Yes, you did!      Andy Neil      12/13/10 01:51      
               Good hobby processor      Per Westermark      12/13/10 06:12      
                  cheaper evaluation boards      Andy Neil      12/13/10 06:37      
                     Debugging support really is vital        Per Westermark      12/13/10 07:11      
                        debug      Andy Peters      12/16/10 15:38      
                           Arduino      Valentin Angelovski      12/23/10 17:59      
                              silabs equivalent to arduino      Andy Peters      12/27/10 10:52      
                                 Broad span of resources available      Per Westermark      12/27/10 12:16      
                                    absolutely, however      Erik Malund      12/28/10 06:50      
                                       Which means we must motivate people      Per Westermark      12/28/10 12:09      
                                          toolstick is cheaper      Maarten Brock      12/31/10 03:45      
                                    re: broad span      Andy Peters      12/28/10 10:33      
                                       Imagination      Per Westermark      12/28/10 11:53      
               I meant...      JecksonS Ben      12/16/10 18:01      
                  Not relevant      Andy Neil      12/16/10 18:10      
                     but      JecksonS Ben      12/16/10 23:14      
                        google      Stefan KAnev      12/16/10 23:20      
                           Solder all - then clean up      Per Westermark      12/17/10 01:17      
                              Agree ... it's all in the flux and wick      Richard Erlacher      12/17/10 15:51      
                           hard to solder      JecksonS Ben      12/17/10 23:39      
                              see 2 ways      Stefan KAnev      12/18/10 00:14      
                                 Hard to ...      JecksonS Ben      12/18/10 21:10      
                                    You just aren't listening, are you?      Andy Neil      12/19/10 09:01      
                                       hard or not      Erik Malund      12/19/10 17:02      
                                       re: just not listening      Andy Peters      12/23/10 11:16      
                              Don't solder pad for pad      Per Westermark      12/18/10 01:42      
                        oy      Andy Peters      12/23/10 11:14      

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