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ÈÍÑÒÐÓÊÖÈÈ ÂÂÎÄÀ/ÂÛÂÎÄÀ
ÑÏÅÖÈÀËÜÍÛÅ FNC-ÈÍÑÒÐÓÊÖÈÈ
 ÏÊ èìååòñÿ âîçìîæíîñòü ïðåðûâàíèÿ âûïîëíåíèÿ èíñòðóêöèè ïîñðåäñòâîì ñïåöèàëüíîãî
áèòà Ì8028:
Ïðåðûâàíèå áëîêèðîâàíî (M8028 = 0)
Ïðåðûâàíèå ðàçðåøåíî (M8028 = 1)
Ïåðåõîä íà ïîäïðîãðàììó îæèäàåò îêîí÷àíèÿ
âûïîëíåíèÿ èíñòðóêöèè FROM
Ïåðåõîä íà ïîäïðîãðàììó âûïîëíÿåòñÿ íåìåäëåííî.
Ïðè ïåðåõîäå ïî ïðåðûâàíèþ âîçìîæíà íåáîëüøàÿ
çàäåðæêà, íå áîëåå ÷åì (800ì+200)ìêð ñåê, ãäå
ì=êîëè÷åñòâî 32 áèòíûõ ñëîâ
Ãàðàíòèðóåò âûïîëíåíèå èíñòðóêöèè FROM â
ïðîãðàììå ïðåðûâàíèÿ, íå îêàçûâàÿ âëèÿíèå íà äðóãèå
èíñòðóêöèè
Ïåðåõîä ïî ïðåðûâàíèþ ïðîèñõîäèò íåìåäëåííî.
Ïîñëå âîçâðàòà èç ïðîãðàììû ïðåðûâàíèÿ
âîçîáíîâëÿåòñÿ ðàáîòà èíñòðóêöèè FROM. Åñëè â
ïðîãðàììå ïðåðûâàíèÿ çàïðîãðàììèðîâàíà
èíñòðóêöèÿ FROM, òî äàííûé ðåæèì áóäåò âûïîëíÿòñÿ
íå êîððåêòíî.
M8028 íå äîëæåí èñïîëüçîâàòüñÿ åñëè íåîáõîäèìà
âðåìåííàÿ ñèíõðîíèçàöèÿ.
ÏÐÈÌÅÐ ×òåíèå äàííûõ
X10
n1 n2 [D+] n3
FROM K0 K5 D5 K4
Ðèñ. 7-24.
Ïðèìåð ïðîãðàììèðîâàíèÿ
FROM-èíñòðóêöèè
ÓKÀÇÀÍÈÅ
C000264C
Ïî ïðèìåðó, ïîêàçàííîìó íà ðèñóíêå, ñîäåðæàíèå àäðåñîâ áóôåðíîé ïàìÿòè #5...#8
ñïåöèàëüíîãî ìîäóëÿ ñ ïîçèöèîííîãî íîìåðà 0 ïåðåäàåòñÿ â D5...D8. Çíà÷åíèå àäðåñàöèè
ïðåäñòàâëåíî ïî îòäåëüíîñòè íà ñëåäóþùåì ðèñóíêå.
Ðèñ. 7-25.
ÏÊ
Ñïåö. ìîäóëü
Àäðåñàöèÿ ïðè FROM-èíñòðóêöèè
Bfm #0
D5
Bfm #5
D6
Bfm #6
D7
Bfm #7
D8
Bfm #8
Bfm #31
C000265C
Ħ
Åñëè äîëæíî ïåðåäàâàòüñÿ òîëüêî ñîäåðæàíèå àäðåñîâ áóôåðíîé ïàìÿòè, òî íóæíî
çàíåñòè â n3 çíà÷åíèå 1.
7 – 24
MITSUBISHI ELECTRIC