43967002TH Rev.1 29 /Oki Data CONFIDENTIAL 1. ConfigurationNote! Signal name in the parenthesis ( ) indicates the nibble mode.Functions in the compatible mode is described only.The nibble mode in compliance with IEEE std12_4-1994 that isspecified by IEEE is supported. If any computer or cable that do notcomply with this specification is sued, unexpected operations mayoccur.1.5.3 Parallel interface specificationsFundamental specificationsParallel interface in compliance with IEEEstd1284.-1994ConnectorPrinter side: 36 pins receptacle (male) connector type: 57RE-40360-830B-D29(Manufactured by Daiichi-Denshi Industry or equivalent )Cable side: 36 pins plug (male) connector type: 57FE-30360 (Manufactured byDaiichi-Denshi Industry or equivalent )CableUse the cable in compliance with IEEE std. 1284-1994 of less than 1.8 m or equivalent(Use the shielded cable.)Transmission modeCompatible/Nibble/ECPInterface LevelLow level: +0.0 V to +0.8 VHigh level: +2.4 V to +5.0 VConnector pin arrangement1836 191Interface signalPin No. Signal name Direction Function1 nStrobe (HostClk) TO PRINTER Pulse to read data. Data is read at trailing edge.29DATA 1DATA 8Bi-direction 8-bit parallel data High level is “1” and low levelis “0”.10 nAck(PtrClk) FROMPRINTERSignal indicating completion of data reception11 Busy(PtrBusy) FROMPRINTERSignal indicating if a printer is ready to receivedata. Data reception is impossible while it ishigh-level.12 PError(AckDataReq) FROMPRINTERHigh-level indicates paper error.13 Select(Xflag) FROMPRINTERWhen the parallel interface is available, it isalways at high-level.14 nAutoFd(HostBusy) TO PRINTER Used by the bidirectional communication15 - - Not used16 GND - Signal ground17 FG - Chassis ground18 +5V FROMPRINTERUnable to supply power to outside device.19 30 GND - Signal ground31 nInit(nInit) TO PRINTER Printer is initialized at low-level.32 nFault(nDataAvail) FROMPRINTERWhen a printer is in the alarm state, it is set tolow-level.33 GND - Signal ground34 - - Not used35 HILEVEL FROMPRINTERPulled up to + 5 V with 3.3 k resistor inside aprinter.36 nSelectIn(IEEE1284 active)TO PRINTER Used by the bidirectional communication It mustbe at the low-level during the compatible mode.
