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Parallel Interface
User’s Manual C-3
INTERFACE
INFORMATION
11 29 Busy Output Data cannot be received when this signal
is high. e.g., if the buffer is full, or an
error occurs.
Printer Busy Reverse data transfer phase:
Data bit 3, data bit 7, then forward path
(host to printer) busy status
12 30 Paper Empty
(P E)
Output This signal goes high if paper runs out.
Ack Data Req Reverse data transfer phase:
Data bit 2, then data bit 6
Reverse idle phase:
This signal is set high until the host
requests data and, after that, follows the
D
ata Available signal.
13 — Select
(SLCT)
Output This signal goes high when the printer is
selected (online), and goes low when the
printer is deselected (offline).
X Flag Reverse data transfer phase:
Data bit 1, then data bit 5
Table C–1 Parallel interface signals (Continued)
Pin
number
Return
pin
number
Signal
Compatible mode
Nibble mode
Direction Description
DL6400/6600 Book Page 3 Thursday, September 21, 2000 7:52 PM