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A-14
Technical Specifications
Cardinal U/G
Rev. C
A5 size APPA.FM
11/6/98 Pass 0
L
Proof Sign-off:
Kimura _______
Nishi _______
Hoadley _______
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
.
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.