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Appendixes
69
2 Specifications
• Interface Specifications
Parallel interface pin assignment table
Pin No. Signal Input/Output Description
1 STROBE Input 8-bit data reading signal
2−9 DATA1-8 Input 8-bit parallel signal
10 ACKNLG Output 8-bit data request signal
11 BUSY Output Signal specifying printer Busy
12 PERROR Output Signal specifying paper out
13 SELECT Output Signal specifying printer ‘ON LINE’
(printing enabled) or ‘OFF LINE’
(pausing)
14 AUTOFD Input Invalidness (ignorance)
15 NC − Not used
16 S.GND Output Signal ground
17 FGND Output Frame ground
18 P.L.H Output Signal specifying Peripheral Logic
High (pull up to +5V with 2 KΩ]
19−30 GND Output Ground for twisted pair return
31 INIT Input Printer reset
32 FAULT Output Signal specifying printer error
33−35 NC − Not used
36 SELECTIN Input Invalidness (ignorance)