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Appendixes
71
2 Specifications
Interface Specifications
n 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)