D-1Interface InformationDInterface InformationThis printer can communicate with a computer through either a RS-232 serial interface ora Centronics parallel interface. The printer can use both interfaces at the same time whenthe I/F TYPE option is set to AUTO in the Set-Up mode.This appendix provides information you may need for wiring your own interface cables orfor programming computer-to-printer communications. Most users do not need theinformation in this appendix.Parallel InterfaceThis printer can communicate with the host in two different modes:• UnidirectionalIn this mode, the printer operates an industry standard 8-bit Centronics parallelinterface.• BidirectionalThis printer supports bidirectional communication per IEEE 1284 Standard Nibblemode. This printer can switch between Compatible Centronics and Nibble modes.The interface connector is 36-pin Amphenol type with ESD protection.The first table gives the connector pin assignments in Compatible Centronics mode, andthe second table those in Nibble mode.The data transmission rate reaches 5,000 characters per second at the minimum.Designations of circuit direction are provided to indicate the source of the signals.
