Epson FX-2170 - Impact Printer, User Manual

Page: 134 / 157

Pin
Signal name
n o .
14
Host Busy
31
INIT
32 DataAvail/
DataBit-0,4
36
1284-Active 30
18 Logic H
GND
30
30
29
In/Out
In
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 m-enter
reverse data transfer phase.
In Set LOW to initialize the winter. I
out
In
out
This signal is LOW when the
printer is in an error state.
Set HIGH during 1284 mode.
This line is pulled up to +5V
through 3.9 k resistance.
This line is pulled up to +5V
through 3.3 k resistance.
Chassis GND.
Signal GND.
3 5
+5V
-
O u t
17 Chassis
- -
16, 33, GND
-
-
19-30
15 ,34
NC
-
-
Not connected.
l
In/Out shows the direction of signal flow as viewed from the printer.
A-16 Specifications, Command Summary, and Character
Tables