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Appendix
Appendix B Connectors and Allocation Signal
standard.
Meaning of the signals
When the bidirectional is OFF:
• nStrobe (Pin No.1)
The synchronous signal for the reading of data 1-8; needs the LOW active pulse.
• Data1-8 (Pin No.2-9)
For the 8-bit parallel data input, Data 1 is LSB (lowest bit) and Data 8 is MSB (upper-
most bit).
• nAck (Pin No.10)
A LOW active pulse signal which indicates that the received data has been taken in.
• Busy (Pin No.11)
A HIGH active signal which indicates that the printer is unable to receive data.
• PError (Pin No.12)
A HIGH active signal which indicates that there is no more paper.
• Select (Pin No.13)
A HIGH active signal which indicates that it is possible to receive data.
• nAutoFd (Pin No.14)
The signal when the bidirectional is ON.
• Chassic Gnd (Pin No.17)
Connected to frame ground.
• Peripheral Logic High (Pin No.18)
+5V voltage on the printer side.
• Signal Ground (Pin No.19-30)
Connected to the various signal ground.
• nInit (Pin No.31)
The LOW active pulse signal which requests for the initialization of the printer.
• nFault (Pin No.32)
The LOW active signal which indicates that errors such as paper jams have occurred in
the printer.
• nSelectIn (Pin No.36)
The signal when the bidirectional is ON.
When the bidirectional is ON:
All connections adhere to the IEEE 1284 connector standard.