Serial Interface (Option); Ieee 1284 Parallel Interface; Reverse Mode (Data Transmission From Printer To Host) - Epson TM U200D - B/W Dot-matrix Printer Technical Manual

Serial interface connection example
NOTES:
Set the handshaking so that the transmit 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

Copyright (C) 1994 by the Institute of electrical and Electronic Engineers, Inc.
Specification
Data transmission:
Synchronization:
Handshaking:
Signal levels:
Connector:
Reverse communication (Printer Host):

Reverse Mode (Data Transmission from Printer to Host)

The STATUS data transmission from the printer to the host is proceeded 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 unists of four
bits (Nibble). In the Byte Mode, data transmissions are proceeded by making the eight-bit data
lines bidirectional.
1-18 Features and General Specifications
Host
TXD
DSR
CTS
RXD
DTR
FG
SG
8-bit parallel
Externally supplied nStrobe signals
nAck and Busy signals
TTL compatible
57RE-40360-830B (DDK) or equivalent (IEEE 1284 Type B)
Printer
RXD
DTR
RTS
TXD
DSR
FG
SG
Nibble or Byte Mode
Rev.B