42615101TH Rev.8 22 /Oki Data CONFIDENTIAL1.5.1.5 Parallel I/F SignalsTable 1-1 shows interface signal names and pin numbers.Table 1-1 SignalsPin No. Signal Name Signal Direction Functions1 Nstrobe (HostClk) →PR Pulse for reading data in at trailing edge.2 DATA 13 DATA 24 DATA 3 8-bit parallel data.5 DATA 4 →PR Each signal is HIGH when data is logical 1 and6 DATA 5 LOW when it is logical 0.7 DATA 68 DATA 79 DATA 810 nAck (PtrClk) ←PR Indicates the completion of data reception.11 Busy (PtrBusy) ←PR Indicates whether the printer is ready for receivingdata. Data cannot be received while the signal isHIGH.12 PError (AckDataReq) ←PR Indicates paper error when held HIGH.13 Select (Xflag) ←PR HIGH without exception when the parallelinterface is enabled.14 NAutoFd (HostBusy) →PR Used in bidirectional communication.15 - - Unassigned.16 GND - Signal ground.17 FG - Chassis ground.18 +5V ←PR Used for supplying +5V. Power cannot besupplied to the outside of the printer.19~ GND - Signal ground.3031 Nlnit (nlnit) →PR Initializes the printer when held LOW.32 NFault (nDataAvail) ←PR LOW during alarm.33 GND - Signal ground.34 - - Unassigned.35 HILEVEL ←PR Pulled up to +5V at 3.3KΩ inside the printer.36 Nselectin →PR Used in bidirectional communication. Low without(IEEE 1284 active) exception in compatible mode.Note: Parenthesized signal names are used in nibble mode.Only functions in compatible mode are listed.This printer supports the IEEE std 1284-1994 nibble mode. Note that, when used withpersonal computers or cables that do not comply with the standards, the printers mayexhibit unpredictable behavior.
