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06/21/06 19:05
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#118790 - 74hc595/597 connection with c51
hi everyone
now im using 74HC595 (thnx to mr.kai klass)IN place of the 8255.can anyone tell me where to connect the two of its pins nmely shift register clk input & storage register clock input with the c51.for the 74HC597 SHall i connect the parallel load input pin with the ALE of c51?????

List of 34 messages in thread
TopicAuthorDate
74hc595/597 connection with c51            01/01/70 00:00      
   Any available port pin            01/01/70 00:00      
   I'd suggest you read the datasheet            01/01/70 00:00      
      little more info as u require richard            01/01/70 00:00      
         start it simple and stupd            01/01/70 00:00      
   bit-bang            01/01/70 00:00      
      problem is ...            01/01/70 00:00      
         talking about standard '51...            01/01/70 00:00      
            That's why I want to "fix" it ...            01/01/70 00:00      
         there is'nt so why do you proselytize f            01/01/70 00:00      
            PC's are async, Mode-0 is not            01/01/70 00:00      
               I know that, but 99.17% of all '51 UART            01/01/70 00:00      
                  Do you know what UART means?            01/01/70 00:00      
                     A resounding NO. I use synchrono            01/01/70 00:00      
                        SPI??? Is that in the "bible"            01/01/70 00:00      
                           no, it is not - but it is a very well de            01/01/70 00:00      
                              You're well into nonsense, now, Erik            01/01/70 00:00      
                              you just ignore the real reason            01/01/70 00:00      
                                 This may be a valid topic, but not here.            01/01/70 00:00      
                                    Whenever you use shift registers for I/O            01/01/70 00:00      
                                       Doesn't SPI have a bunch of "features?"            01/01/70 00:00      
                                          yes, we ARE mixing, both threads touch s            01/01/70 00:00      
                                             I don't want to confuse the O/P ...            01/01/70 00:00      
                                                that would be wrong            01/01/70 00:00      
                                                   I think we've lost the O/P            01/01/70 00:00      
                           this may be the answer to your 'prayers'            01/01/70 00:00      
                              Thanks, but which prayers are those?            01/01/70 00:00      
                                 those for a fast synchronous communicati            01/01/70 00:00      
                                    I don't want to use a commercial chip            01/01/70 00:00      
                                       why not            01/01/70 00:00      
                                          If I want to use SPI, I'll build it in            01/01/70 00:00      
                  Do you know what UART means?            01/01/70 00:00      
                     ^%$#@! I didi it again!            01/01/70 00:00      
   Depends on your needs...            01/01/70 00:00      

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