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C-2. Two-way parallel interface (IEEE1284)
C-2-1. Interface specifications
(a) Forward channel
The forward channel mode is the mode in which the widely used
Centronics interface is regulated.
• Data transfer method:
• Synchronizing system: Externally supplied nStrobe signal
• Handshake:
• Signal level:
(b) Reverse channel
The transfer of status data from the printer to the host is only carried in the
nibble mode.
8 bit parallel
nAck signal and Busy signal
All signals are TTL compatible.
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