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A-12
Technical Specifications
Dove
Rev. C
A5 size appa.mif
10/28/98 Pass 0
L
Proof Sign-off:
Nishi _______
<leadername> _______
<editorname> _______
nSelectIn/IEEE1284active
GND
Twisted pair return signal.
CG
Connected to the printer chassis. This signal and GND are connected.
+5V
Pull up to + 5 V with 1 k
Ω
.
Compatibility mode: Always low.
Negotiation phase: This signal is set high at the same time
that HostBusy is low in order to request
1284 mode.
Reverse data transfer phase: This signal is set high to indicate that the
bus direction is from the printer to the
host. This signal is set low to terminate
1284 mode, setting the bus direction from
the host to the printer.
Reverse idle phase: Same as reverse data transfer phase.
ECP mode: Always high. This signal is set low to
terminate ECP mode and return to
compatibility mode.