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Ñòóäåíòàì > Êóðñîâûå > Âû÷èñëèòåëüíûå ñèñòåìû è ìèêðîïðîöåññîðíàÿ òåõíèêà

Âû÷èñëèòåëüíûå ñèñòåìû è ìèêðîïðîöåññîðíàÿ òåõíèêà

Ñòðàíèöà: 2/11

 

ÐÅÃ À{1:32}=ÐÅÃ À{1:31}.0

Ñ×ÅÒ Ö=Ñ×ÅÒ Ö -1

 

 

                     ÍÅÒ

Ñ×ÅÒ Ö=1

 

 

B {1:6}=Ñ×ÅÒ Ö1; Ñ {1:6}=Ñ×ÅÒ Ö2

 

 

ÊÎÍÅÖ

 

Ðèñóíîê 3

Áëîê-ñõåìà àëãîðèòìà ðàáîòû óñòðîéñòâà

Ìèêðîïðîãðàììà

Ïåðåìåííûå:

Âõîäíûå:

·      D{1:32} - âõîäíîé êîä

·      ñòðîá

Âûõîäíûå:

·      Â {1:6}, Ñ{1:6} - âûõîäíîé êîä

Âíóòðåííèå:

·      ÐÅÃ À{1:32}, ÐÅÃ Â{1:32} - ðåãèñòðû

·      Ñ×ÅÒ Ö1{1:6}, Ñ×ÅÒ Ö2{1:6} - ñ÷åò÷èêè öèêëîâ

Ïðèçíàêè: 

·      Ð1 - ñòðîá=1

·      Ð2 - ÐÅÃ À{1}=0 & ÐÅÃ A{2}= 1 & ÐÅÃ À {3}=0

·      Ð3 - ÐÅÃ À{32}=0 & ÐÅÃ A{31}= 1 & ÐÅÃ À {30}=0      

·      Ð4 - Ñ×ÅÒ Ö1 {1:6} = 32

·      Ð5 - Ñ×ÅÒ Ö2 {1:6} = 1

 

Ïðîãðàììà

Ì1                       ÅÑËÈ ÍÅ Ð1 ÒÎ Ì1

       (ÑÒÐÎÁ)       ÐÅÃ Â{1:32}=D {1:32}

       (ÓÇÀÏ1)       ÐÅÃ À{1:32}=ÐÅÃ Â {1:32}

       (ÓÍ1)           Ñ×ÅÒ Ö1 {1:6} =2                                     

Ì2                       ÅÑËÈ Ð2 ÒÎ Ì3

       (ÓÑÄÂ1)       ÐÅÃ À{1:32}=ÐÅÃ À{2:32}.0             }

       (ÓÑ×1)         Ñ×ÅÒ Ö1 {1:6}=Ñ×ÅÒ Ö1 {1:6}+1    }     ÓÝ1

                             ÅÑËÈ ÍÅ Ð4 ÒÎ Ì2

Ì3 (ÓÇÀÏ1)        ÐÅÃ À{1:32}=ÐÅÃ Â {1:32}

       (ÓÍ2)            Ñ×ÅÒ Ö2 {1:6} =31

Ì4                        ÅÑËÈ Ð3 ÒÎ Ì5

      (ÓÑÄÂ2)         ÐÅÃ À{1:32}=0.ÐÅÃ À{1:31}            }

      (ÓÑ×2)           Ñ×ÅÒ Ö2 {1:6}=Ñ×ÅÒ Ö2 {1:6}-1    }  ÓÝ2

                              ÅÑËÈ ÍÅ Ð5 ÒÎ Ì4

Ì5  (ÓÑ×ÈÒ1)    Â{1:6}=Ñ×ÅÒ Ö1 {1:6}                          }          

        (ÓÑ×ÈÒ2)    Ñ{1:6}=Ñ×ÅÒ Ö2 {1:6}                          }  ÓÝ3

                         ÊÎÍÅÖ (ÈÄÒÈ Ê Ì1)

 

Êàê âèäíî èç òåêñòà ìèêðîïðîãðàììû, íåêîòîðûå ñèãíàëû ìîæíî îáúåäèíèòü è çàìåíèòü ýêâèâàëåíòíûìè ñèãíàëàìè. Ôóíêöèîíàëüíàÿ ñõåìà îïåðàöèîííîé ÷àñòè óñòðîéñòâà ïðèâåäåíà íà ðèñóíêå 4.

 

Ðàçðàáîòêà óïðàâëÿþùåãî àâòîìàòà ñ æåñòêîé ëîãèêîé

Óïðàâëÿþùèé àâòîìàò ñ æåñòêîé ëîãèêîé áóäåò ðåàëèçîâûâàòüñÿ â âèäå êëàññè÷åñêîãî êîíå÷íîãî àâòîìàòà Ìèëè èëè Ìóðà. Íà îñíîâàíèè áëîê-ñõåìû àëãîðèòìà ðàáîòû óñòðîéñòâà îïðåäåëèì êîëè÷åñòâî ñîñòîÿíèé äëÿ êàæäîãî òèïà àâòîìàòà. Îáîçíà÷èì ñîñòîÿíèÿ àâòîìàòà Ìóðà áóêâîé S, à ñîñòîÿíèÿ àâòîìàòà Ìèëè - S’. Êàê âèäíî èç ðèñóíêà 5, ó àâòîìàòà Ìóðà áóäåò øåñòü ñîñòîÿíèé, â òî âðåìÿ êàê ó àâòîìàòà Ìèëè - ëèøü ÷åòûðå.

 

                                                              ÍÀ×ÀËΠ      S0             

 

                                                                               S’0

                                                       0           Ð1

 

 

                                                           ÓÍ 1, ÓÇÀÏ 1  S1

 

                                                0                               S’1            1

                                                                    Ð2

 

 

                                ÓÝ 1    S2                                                   ÓÇÀÏ 1, ÓÍ 2     S3

 

                    0

                                   Ð4         S’2

 

 

                          ÓÇÀÏ 1 ÓÍ 2    S3

 

 

                                                     0                          S’3     1

                                                                     Ð3