Serial Interface (Option); Ieee 1284 Parallel Interface - Epson TM-U200 Series Technical Manual

C o n fid e n tia l
Serial interface connection example
Notes:
Set handshaking so that transmitted data can be received.
Transmit data to the printer after turning on the power and initializing the printer.
RS-485 Serial Interface (option)
Refer to the Appendix for details.

IEEE 1284 Parallel Interface

Complies with the standard described in the IEEE 1284 specification by the Institute of Electrical
and Electronic Engineers, Inc.
Compatibility Mode (Host to Printer: Compatible with Centronics interface)
Data transmission:8-bit parallel
Synchronization: Externally supplied STROBE signals
Handshaking: ACK and BUSY signals
Signal levels: TTL-compatible
Connector: 57RE-40360-830B (DDK) or equivalent (IEEE 1284 Type B)
Reverse communication
(Printer to host): Nibble or byte mode
Reverse Mode (Data Transmission from Printer to Host)
Status data transmission from the printer to the host occurs in nibble or byte mode. These modes
allow data transmission from the asynchronous printer under control of the host. Data
transmissions in nibble mode are made via the existing control lines in units of four bits (a
nibble). In byte mode, data transmissions proceed by making the eight-bit data lines
1-20 Features and General Specifications
Host
TXD
DSR
CTS
RXD
DTR
FG
SG
Printer
RXD
DTR
RTS
TXD
DSR
FG
SG
Rev. A