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???
04/12/07 13:17
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 -1 Answer is Wrong
 +1 Underrated		 #137030 - 11.0592Mhz xtal and 56K - challenging
It seems that the most common crystal (or at least it is the one pointed out in the tutorial package on here) is 11.0592Mhz.

Some people claim that they can get a serial port speed of 56K with this crystal.

If serial mode 1 was used then:

For TH1 and TL1 and PCON.7:

(11059200 / 12 * (256 - 255)) * ((2 ^ 1) / 32) = 57600

TH1 and TL1 will have to be 255 and PCON.7 must be set.

Having said that, If there was an interrupt routine that must be serviced when the serial character is received, How would it be effectively serviced when the interrupt is called every machine cycle?

By effectively serviced, how can it receive characters and store them in any memory?

List of 27 messages in thread
TopicAuthorDate
11.0592Mhz xtal and 56K - challenging            01/01/70 00:00      
   Character interrupts are not every machine cycle            01/01/70 00:00      
      Well done!            01/01/70 00:00      
   RTFM            01/01/70 00:00      
      I must have RTWFM            01/01/70 00:00      
         for the edification of others            01/01/70 00:00      
            the link            01/01/70 00:00      
               this?            01/01/70 00:00      
   Deja vu?            01/01/70 00:00      
      now you are telling me!            01/01/70 00:00      
         when referring to tomes            01/01/70 00:00      
            my manuals            01/01/70 00:00      
               Confirmation?            01/01/70 00:00      
                  10 or 11 bit times?            01/01/70 00:00      
                     sometimes            01/01/70 00:00      
                     Are you sure,,,            01/01/70 00:00      
                        Me too!            01/01/70 00:00      
                     No It is me            01/01/70 00:00      
         You are putting the cart before the horse            01/01/70 00:00      
            that works, this does too (and, in my opinion) is            01/01/70 00:00      
               less general is always simpler!            01/01/70 00:00      
                  and both were stated            01/01/70 00:00      
                     I dont use T1            01/01/70 00:00      
                        sure but what does that have to do with it?            01/01/70 00:00      
   Every machine cycle...            01/01/70 00:00      
      not quite            01/01/70 00:00      
         I shoul have said "in your case..."            01/01/70 00:00      

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