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???
05/04/10 13:25
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#175665 - because it is not there
Responding to: ???'s previous message
What is this crossbar ? I have seen it in the circuit diagrams

because it is not there. The crossbar is internal to the chip. Basically, if all I/O on the '120 was put out, there would be no general purpose pins left. The crossbar is a mechanism internal to the chip that only feed the peripherals you need (select) to port pins. see the F120 datasheet chapter 18

Erik

List of 49 messages in thread
TopicAuthorDate
8051 Development            01/01/70 00:00      
   which two?            01/01/70 00:00      
      Thanks            01/01/70 00:00      
      On-Chip Debug            01/01/70 00:00      
   Spec error in Mazidi's book            01/01/70 00:00      
      Architecture vs Implementation            01/01/70 00:00      
   Other books            01/01/70 00:00      
   Background?            01/01/70 00:00      
      reply : Background            01/01/70 00:00      
         RE: I am a Bachelor Of Technology in Computer Science            01/01/70 00:00      
            Reply : Difference            01/01/70 00:00      
               do you know what a ...            01/01/70 00:00      
                  reply : on chip            01/01/70 00:00      
                     there is no such thing            01/01/70 00:00      
                     There is no such thing!            01/01/70 00:00      
                        reply : no such thing            01/01/70 00:00      
   C8051Fxxx / C8051Txxx            01/01/70 00:00      
      Not a 'T'            01/01/70 00:00      
         Get a kit            01/01/70 00:00      
            It's included            01/01/70 00:00      
               RE: included?            01/01/70 00:00      
                  Which One then ?            01/01/70 00:00      
                     F020            01/01/70 00:00      
                        f120            01/01/70 00:00      
                           F226            01/01/70 00:00      
                              Good point            01/01/70 00:00      
                              Crossbar ?            01/01/70 00:00      
                                 signal multiplexing            01/01/70 00:00      
                                 because it is not there            01/01/70 00:00      
                              Availability            01/01/70 00:00      
                                 crossbar problems            01/01/70 00:00      
                                    f120            01/01/70 00:00      
                                       re: F120            01/01/70 00:00      
                                          yes, however            01/01/70 00:00      
                                             Which lessons ?            01/01/70 00:00      
                                                phrase            01/01/70 00:00      
                                                   OH            01/01/70 00:00      
                                             re: yes, however            01/01/70 00:00      
                                                Let's see when it comes..!            01/01/70 00:00      
                                                   In the meantime...            01/01/70 00:00      
                                    Atleast            01/01/70 00:00      
                                       While you wait for your kit to arrive...            01/01/70 00:00      
                                       use config            01/01/70 00:00      
                                          thank u again            01/01/70 00:00      
                                             Please, pretty please            01/01/70 00:00      
                                                Apology            01/01/70 00:00      
                     Don't over-complicate it!            01/01/70 00:00      
                        thank u !            01/01/70 00:00      
   The Wait is Over            01/01/70 00:00      

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