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???
07/03/10 14:17
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 		 #177081 - not necessarily the case
Responding to: ???'s previous message
Erik Malund said:
P8755 why? It is really Old? and how will you program it? An 8255 and an EEPROM (Or Flash) would be less obsolete.

less obsolete, but still obsolete

The same programmers that I have used since Christ was a child, still work on both the original i8751's and the i8755's. The 8255 predates them both by several years, being one of the first i8080 peripherals.

Nathan, you make the typical mistake of not telling us what you want to do, thus making it impossible to give suggestions for better approaches.

but will it work with the MCS-51 family also indicates that you are not locked in your approach (being locked is always a mistake)

Erik


If he wants to use an external eprom and expand his I/O, (note that the 8755 differs considerably from the 8255) it requires fewer parts to be wired. I can't blame him for considering that. Fewer interconnections = lower risk.

RE



List of 38 messages in thread
TopicAuthorDate
Interfacing W83C43\P8755 with 8052 family            01/01/70 00:00      
   Looks Posible            01/01/70 00:00      
      less, but still            01/01/70 00:00      
         not necessarily the case            01/01/70 00:00      
   Please Describe the Situation...            01/01/70 00:00      
      the Situation...            01/01/70 00:00      
         OK            01/01/70 00:00      
            microcomputers            01/01/70 00:00      
               renamed??            01/01/70 00:00      
                  Sorry            01/01/70 00:00      
                  maybe today ... but back when they were popular ...            01/01/70 00:00      
                     and yet you advocate ...            01/01/70 00:00      
                        What?            01/01/70 00:00      
         Good luck with that ...            01/01/70 00:00      
            Serial EEPROM            01/01/70 00:00      
               does the 8051 family support I2C?            01/01/70 00:00      
         Do they actually work?            01/01/70 00:00      
            You have the same question with "new" parts            01/01/70 00:00      
               I don't know about the US...            01/01/70 00:00      
                   I do know about the US...            01/01/70 00:00      
                     Good deliveries            01/01/70 00:00      
               pure paranoia            01/01/70 00:00      
   i8755 wasn't exclusively for the 8048 family            01/01/70 00:00      
      Mr anachronism            01/01/70 00:00      
         My point was ...            01/01/70 00:00      
            name one            01/01/70 00:00      
               consider the O/P's situation            01/01/70 00:00      
                  voltage regulators            01/01/70 00:00      
                     Programming old parts            01/01/70 00:00      
                        And if putting out ~100$ US...            01/01/70 00:00      
                        throwing good money after bad            01/01/70 00:00      
                     Catch 22            01/01/70 00:00      
                        The catch is            01/01/70 00:00      
                           Yes            01/01/70 00:00      
                           it depends on what your goals are            01/01/70 00:00      
                              True - but check how the goal was set            01/01/70 00:00      
                                 Sometimes it is easy to justify, sometimes not            01/01/70 00:00      
               RE: "no value" (sic)            01/01/70 00:00      

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