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Chapter 9 Specifications
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58
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2 Parallel interface
Specifications
Transfer method: 8-bit parallel (compatibility mode)
Synchronous: Strobe pulse
Handshaking: ACKNLG and BUSY signals
Signal level: TTL
Printer side: 36-pin non-phenol type
Pin assignment
Pin No. Signal Input/Output Description
1 STROBE Input Strobe signal to read 8-bit data
2−9 DATA1-8 Input 8-bit parallel data signal
10 ACKNLG Output 8-bit parallel data request signal
11 BUSY Output Signal to indicate printer ‘Busy’
12 PERROR Output Signal to indicate paper out
13 SELECT Output Signal to indicate printer on line or off line
14 N.C − Not used
15 N.C − Not used
16 GND − Ground
17 F.GND − Frame ground
18 N.C − Not used
19−30 GND − GND
31 INIT Input Invalid (ignored)
32 FAULT Output Signal to indicate printer error
33−35 N.C − Not used
36 N.C − Not used