Toshiba B-SA4T Series Product Description page 13

1. OUTLINE
HostBusy
nDataAvail
Input
Reverse data transfer phase:
Reverse idle phase:
Output
Reverse data transfer phase:
Reverse idle phase:
It indicates that the host can receive data
from the printer by 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 one 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
IEEE1284 idle phase stops, and the
interface enters the Compatibility mode.
When the signal is low, it indicates the
printer has data to be 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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EO10-33016A
1.5 Electronics Specifications
At that time, there is no
Active signal is low, the