Oce WP20 Operation Manual

Contents

C-1Appendix C Host Computer InterfaceThis appendix explains the signals used in the printer’sparallel, USB, and serial (option) interfaces. It also lists pinassignments, signal functions, timings, connectorspecifications, and voltage levels.This appendix explains the following topics:•Parallel Interface•USB Interface•Serial Interface (option)The printer features fast data transmission with the parallelinterface. The parallel interface mode can be activated fromthe operator panel. SeeChanging Parallel Interface Modes onpage 1-43.Use a parallel printer cable that complies with the IEEE1284standard.Auto (default)The printer automatically changes its communication modeto the one the host computer is currently using.NormalThe printer uses the standard communication methodprescribed for Centronics interfaces.High-speedThis mode enables faster data transmission between theprinter and the host computer. (Select this mode if printingproblems occur when the printer is connected to aworkstation.)Nibble (high)High speed data communication is used in compliance withthe IEEE1284 standard. Ordinarily, you should leave thissetting unchanged.The pins of the parallel interface connector carry the signalslisted in the following tableParallel Connector PinAssignment. Asterisks in the table indicate signals that areactive low. The table also indicates whether each signal isincoming or outgoing with respect to the printer.Parallel Connector Pin Assignment[ ]: Signal names in the Auto mode and Nibble (high) mode(IEEE1284). In the Auto mode and Nibble (high) mode,these signals are bi-directional.Detailed descriptions of the signals follow.Parallel InterfaceParallel Interface Communication ModesNOTEInterface SignalsPin In/out Description1 In Strobe* [nStrobe]2 In/Out Data 0 [Data 1]3 In/Out Data 1 [Data 2]4 In/Out Data 2 [Data 3]5 In/Out Data 3 [Data 4]6 In/Out Data 4 [Data 5]7 In/Out Data 5 [Data 6]8 In/Out Data 6 [Data 7]9 In/Out Data 7 [Data 8]10 Out Acknowledge* [nAck]11 Out Busy [Busy]12 Out Paper Empty [PError], returns paperempty status if FRPO O2=213 Out Online (Select) [nSelect], returns off-line status if FRPO O2=214 In Auto-feed [nAutoFd]15 - Not connected16 - 0 V DC17 - Chassis GND18 - +5 V DC19 - Ground20 - Ground21 - Ground22 - Ground23 - Ground24 - Ground25 - Ground26 - Ground27 - Ground28 - Ground29 - Ground30 - Ground31 In Ignored [nInit]32 Out Error*, returns error status if FRPOO2=2 [nFault]33 - Not connected34 - Not connected35 Out Power Ready36 In Ignored [nSelectIn]