7-1
Connectors
Figure 7-1. TM-U375P Rear Panel Connectors
Interface
(Bidirectional parallel interface: in accordance with the IEEE 1284 nibble/byte modes)
Copyright© 1994 by the Institute of Electrical and Electronic Engineers, Inc.
Compatibility mode
(Data transmission from host to printer: Centronics compatible)
Data transmission: 8-bit parallel
Synchronization: Externally supplied nStrobe signals
Handshaking: nAck and Busy signals
Signal levels: TTL compatible
Connector: 57RE-40360 (DDK) or equivalent (IEEE 1284 Type B)
Compatibility mode
(Data transmission from printer to host)
The STATUS data transmission from the printer to the host is accomplished in the Nibble or Byte mode.
This mode allows data transmission from the asynchronous printer under the control of the host. Data transmissions
in the Nibble mode are made via the existing control lines in units of four bits (Nibble). In the Byte mode, data
transmission is accomplished by making the 8-bits data lines bidirectional.
Neither mode can operate at the same time as the compatibility mode, so switching is always required.
The 1284 Nibble/Byte modes may be subject to change without notice.
The TM-U375P printer is the parallel interface model of the TM-U375 printer. Descriptions other than in this chapter are the
same as TM-U375.
FEATURES AND GENERAL SPECIFICATIONS
CONFIDENTIAL
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