![background image](/i/epson/154489/epson-epl-n1600/h/epson-epl-n1600-174.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 (nSelectIn).
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
Ïîäêëþ÷åí ê øèíå +5  ÷åðåç ðåçèñòîð 3,9 êÎì.