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Toshiba B-SX4T Series Specification Page 22

B-sx4t series, b-sx5t series external equipment interface specification.
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Nibble mode
PtrClk (Printer → Host)
Reverse data transfer phase: It is used for evaluating data sent to the host.
Reverse idle phase:
PtrBusy (Printer → Host)
Reverse data transfer phase: Data bit 3 is used for the first transfer. Data bit 7 is used for
AckDataReq (Printer → Host)
Reverse data transfer phase: Data bit 2 is used for the first transfer. Data bit 6 is used for
Reverse idle phase:
Xflag (Printer → Host)
Reverse data transfer phase: Data bit 1 is used for the first transfer. Data bit 5 is used for
HostBusy (Printer ← Host)
Reverse data transfer phase: It indicates that the host can receive data from the printer by
Reverse idle phase:
nDataAvail (Printer → Host)
Reverse data transfer phase: When the signal is low, it indicates the printer has data to be
Reverse idle phase:
When the printer changes the signal from Low to High, an
interrupt informing the host that the data is available, occurs
the second transfer. Indicates the forward channel is in a
Busy state.
the second transfer.
This signal is set to high until the data transfer is requested
by the host. Then, the process is performed according to
the nDataAvail signal.
the second transfer.
setting the signal to low. Then, the host sets the signal to
high, and sends the Ack indicating that the nibble data is
received. When the signal is set to low after the reverse
channel data transfer is performed, the interface phase
changes to the idle phase.
available data on the printer.
When this signal is set to high according to the low pulse of
the PtrClk signal, the host enters the reverse data transfer
phase again.
If this signal is set to high when the
IEEE1284 Active signal is low, the IEEE1284 idle phase
stops, and the interface enters the Compatibility mode.
sent to the host. And it is used for sending data bits 0 and
4.
It is used for indicating that the data is available.
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At that time, there is no

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