A-6
Technical Specifications
Note:
The column heading “Direction” refers to the direction of signal flow as viewed from
the printer.
nstrobe/HostClk
Compatibility mode: Latch pulse used to read in print data. When
low, DATA is valid.
negotiation phase: Latch pulse used to read in print data. When
low, DATA is valid.
negotiation phase: Latch pulse used to read in extensibility reguest
values.
Nibble mode: Always high.
ECP mode: Used to transfer data and addresses from the
host to the printer with handshaking via
PeriphAck (Busy).
DATA 1 to DATA 8 (bidirectional, but may always be an input if ECP
or EPP mode is not supported)
Compatibility mode: Forward channel data.
negotiation phase: Extensibility request value.
Nibble mode: Not used.
ECP mode: Bi-directional data.
31 IN nlnit nReverse
Request
32 OUT nFault nDataAvail nPeriphRequ
est
33 GND
34 NC
35 OUT +5V
36 IN nSelectin IEEE1284 Active
Pin No. Direction IEEE 1284-B connector
Compatibility Nibble ECP
