![background image](/i/epson/155812/epson-epl-n1200/h/epson-epl-n1200-160.png)
nAutoFd/HostBusy/HostAck
Ðåæèì ñîâìåñòèìîñòè: Íå èñïîëüçóåòñÿ.
ôàçà ñîãëàñîâàíèÿ: Äëÿ òîãî ÷òîáû çàïðîñèòü ðåæèì 1284, ýòîò ñèãíàë
óñòàíàâëèâàåòñÿ íà íèçêèé óðîâåíü è çàäàåòñÿ âûñîêèé óðîâåíü
IEEE 1284active (nSelectln). Âïîñëåäñòâèè ýòîò ñèãíàë óñòàíàâëèâàåòñÿ âûñîêèì,
êîãäà PtrClk (nAck) èìååò íèçêèé óðîâåíü.
ôàçà îáðàòíîé ïåðåäà÷è äàííûõ:  ïîëóáàéòîâîì ðåæèìå óñòàíîâêà íèçêîãî
óðîâíÿ ýòîãî ñèãíàëà óêàçûâàåò ïðèíòåðó íà òî, ÷òî ãëàâíûé êîìïüþòåð ãîòîâ
ïðèíèìàòü äàííûå. Êîãäà æå ýòîò ñèãíàë ïðèîáðåòàåò ñóùåñòâåííî âûñîêèé
óðîâåíü, ýòî îçíà÷àåò, ÷òî ãëàâíûé êîìïüþòåð óæå ïðèíÿë äàííûå.
ôàçà îáðàòíîãî îæèäàíèÿ: Ýòîò ñèãíàë ñòàíîâèòñÿ âûñîêèì â îòâåò íà íèçêèé
óðîâåíü èìïóëüñà PtrClk (nAck), ÷òîáû âåðíóòüñÿ â ôàçó îáðàòíîé ïåðåäà÷è
äàííûõ. Åñëè ýòîò ñèãíàë ñòàë âûñîêèì îäíîâðåìåííî ñ óñòàíîâêîé íèçêîãî
óðîâíÿ IEEE 1284active (nSelectln), ôàçà îæèäàíèÿ IEEE 1284 ïðåðûâàåòñÿ, è
èíòåðôåéñ âîçâðàùàåòñÿ â ðåæèì ñîâìåñòèìîñòè.
Ðåæèì ECP: Èñïîëüçóåòñÿ äëÿ óïðàâëåíèÿ ïîòîêîì äàííûõ îáðàòíîãî
íàïðàâëåíèÿ. Òàêæå èñïîëüçóåòñÿ äëÿ êâèòèðîâàíèÿ ÷åðåç PeriphClk (nAck).
NC
Íå èñïîëüçóåòñÿ.
PeripheralLogicHigh
Ïàðàëëåëüíûé B: NC
Ïàðàëëåëüíûé C: Ïîäêëþ÷åí ê øèíå +5  ÷åðåç ðåçèñòîð 3,9 êÎì.
ninit/nReverseRequest
Ðåæèì ñîâìåñòèìîñòè: Ïðè îáíàðóæåíèè ñèãíàëà íèçêîãî óðîâíÿ ïðèíòåð
ñ÷èòàåòñÿ ÇÀÍßÒÛÌ (BUSY) äî òåõ ïîð, ïîêà íå áóäåò ðàçáëîêèðîâàí ýòîò
ñèãíàë íèçêîãî óðîâíÿ.
ôàçà ñîãëàñîâàíèÿ: Âñåãäà âûñîêîãî óðîâíÿ.
ôàçà îáðàòíîé ïåðåäà÷è äàííûõ: Âñåãäà âûñîêîãî óðîâíÿ.
Ðåæèì ECP: Ïðèíèìàåò íèçêèé óðîâåíü ïîñëå ïåðåêëþ÷åíèÿ íà îáðàòíîå
íàïðàâëåíèå. Ïåðèôåðèéíîå óñòðîéñòâî èìååò ðàçðåøåíèå ïåðåäàâàòü ñèãíàëû
äàííûõ òîëüêî òîãäà, êîãäà ýòîò ñèãíàë èìååò íèçêèé óðîâåíü, à ñèãíàë
1284active — âûñîêèé.