A-14 Technical Specifications
Cardinal U/G
Rev. C
A5 size APPA.FM
11/6/98 Pass 0
LProof 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 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. T his
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.