6-12
n Parallel interface pin assignment table
Pin No. Signal Input/Output Description
1 STROBE Input Strobe signal for reading 8-bit data
2-9 DATA1-8 Input 8- bit par allel signal
10 ACKNLG Output 8-bit data request signal
11 BUSY Output Signal specifying printer busy
12 PERROR Output Signal specifying paper absence
13 SELECT O utput Signal specifying printer "on line"
(printing) or "off line" (pause)
14 AUTOFD Input Invalidness (ignorance)
15 NC - No use
16 S.GND - Signal ground
17 FGND - Frame ground
18 P.L.H Output Signal specifying peripheral logic high
(pull up to +5V with 2 KW]
19-30 GND - Ground for twisted pair return
31 INIT Input Printer reset
32 FAULT Output Signal specifying printer error
33-35 NC - No use
36 SELECTIN Input Invalidness (ignorance)