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???
07/10/03 00:42
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 		 #50376 - RE: Short Timing delays
Responding to: ???'s previous message
OK, folks, let's try this again:

Raghu wants his micro to accept a value fron the data bus at some time after the normal point at which the RD pulse goes high. NO amount of external logic in ANY form will do that. It must be internal to the processor. The timing for the rising edge of the RD pulse is controlled by the 8051 internal state machine and occurs during the second half (p2) of the ninth clock cycle (S3 of cycle 2) of a MOVX instruction. NO external logic can change this. What Raghu wants is what are referred to as WAIT STATES in the X86 world, and others. The 8051 family doesn't include provision for wait states. Some special processors, by Dallas and others, allow fixed delays, but no externally available WAIT pin.

List of 56 messages in thread
TopicAuthorDate
Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      Applications of 80C320            01/01/70 00:00      
         RE: Applications of 80C320            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         RE: Short Timing delays            01/01/70 00:00      
            RE: Short Timing delays            01/01/70 00:00      
               RE: Short Timing delays            01/01/70 00:00      
                  RE: Short Timing delays            01/01/70 00:00      
                     RE: Short Timing delays            01/01/70 00:00      
                        RE: Short Timing delays            01/01/70 00:00      
                           RE: Short Timing delays            01/01/70 00:00      
                              RE: Short Timing delays            01/01/70 00:00      
                                 RE: Short Timing delays            01/01/70 00:00      
                                    RE: Short Timing delays            01/01/70 00:00      
                              RE: Short Timing delays            01/01/70 00:00      
                                 RE: Short Timing delays            01/01/70 00:00      
                                    RE: Another interpretation            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         Inverter string delay            01/01/70 00:00      
            RE: Inverter string delay            01/01/70 00:00      
               RE: Inverter string delay            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         RE: Short Timing delays            01/01/70 00:00      
            RE: Short Timing delays            01/01/70 00:00      
               RE: Short Timing delays            01/01/70 00:00      
                  RE: Short Timing delays            01/01/70 00:00      
                     RE: Short Timing delays            01/01/70 00:00      
                     RE: Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays - DeMorganite            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         RE: Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         RE: Short Timing delays            01/01/70 00:00      
            RE: Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
         RE: Short Timing delays            01/01/70 00:00      
            RE: Short Timing delays            01/01/70 00:00      
         Bubbles            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays- Erik            01/01/70 00:00      
         RE: Short Timing delays- Erik            01/01/70 00:00      
            RE: Short Timing delays- Abhishek            01/01/70 00:00      
               RE: Short Timing delays- Abhishek            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      
   RE: Short Timing delays            01/01/70 00:00      
      RE: Short Timing delays- Dave            01/01/70 00:00      
      RE: Short Timing delays            01/01/70 00:00      

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