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Part 2: Product Specifications
2.4 Interface Specifications
The printer's interface is designed to support compatible, nibble, and ECP mode, which
conform to the bi-directional centronics interface standards (IEEE P1284).
Compatible mode uses the same protocols as those protocols which conform to the
conventional centronics interfaces. When this printer works as a printer, data transfer
is available only in compatible mode, and not in nibble or ECP mode, both of which
allow high-speed data communication. The nibble and ECP modes are used, when the
printer is in operation, for transferring status data such as printer's device ID and
printer status to the host computer. They are also used, when the scanner is in
operation, for communicating the data read from the optional scanner cartridge to the
host computer, provided that it also is set in nibble or ECP mode.
The parallel interface sends 8 bits (one byte) of data at a time and is transistor-
transistor-logic (TTL) compatible.
The interface cable must be constructed of American Wire Gauge (AWG) No. 28 or
larger. The maximum length of the twisted-pair shielded cable must be 2.0 m
(approximately 6.6 feet).
1) Interface Type
IEEE1284 compatible parallel interface
2) Data transfer
8-bit parallel interface
3) Signal voltage levels
Low: 0.0 V to +0.8 V
High: +2.4 V to +5.0 V
4) Input/ output
Each signal pulled up with +5V.
5) Interface cable
Type: Twisted-pair double shielded cable
Material: AWG#28 or larger
Length: Up to 2.0 m (6.6 feet)
6) Interface connectors
On printer: Amphenol 57-40360 (or equivalent)
On cable: Amphenol 57-30360 (or equivalent)
2-12
BJC-2000
BJC-2000
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