Epson LQ-2170 User Manual page 136

Pin Signal name
no.
14 HostBusy
31 INIT
32 DataAvail/
DataBit-0,4
36 1284-Active
18 Logic H
35 +5V
17 Chassis
16, 33, GND
19-30
15 ,34 NC
* In/Out shows the direction of signal flow as viewed from the printer.
A-16
Specifications, Command Summary, and Character Tables
GND In/Out
30 In
30 In
29 Out
30 In
- Out
- Out
- -
- -
- -
Description
Set LOW to indicate that host
can receive peripheral
device to host data. Then set
high to acknowledge receipt
of that nibble. Set high in
response to PtrClk
(nAck) low pulse to re-enter
reverse data transfer phase.
Set LOW to initialize the printer.
This signal is LOW when the
printer is in an error state.
Set HIGH during 1284 mode.
A high signal indicates that all
other signals sourced by the
peripheral are in a valid state.
This line is pulled up to +5V
through 3.3 k resistance.
Chassis GND.
Signal GND.
Not connected.