Byte
Mode
The
printer
and
host
send
data
to
each
other
along
eight
data
lines
(one
bit
per
line).
If
bidirectional
communication
is
supported
by
the
printer
and
the
host,
the
host
will
take
control
of
the
data
transfer.
The
Negotiation
Phase
The
negotiation
phase
determines
which
operating
mode
will
be
used.
At
this
time,
the
host
and
the
printer
will
sense
what
devices
are
attached,
the
supported
signals
available,
and
which
mode
to
use.
The
selected
mode,
in
turn,
defines
the
pins
on
the
1284
connector.
There
are
36
pins
on
the
parallel
interface.
Each
one
sends
a
different
signal.
Pin
1,
for
example,
can
send
a
Strobe
signal
or
a
HostC1k
signal,
depending
on
the
mode
selected.
See
Table
8
for
the
different
connector
signals.
Signals
Table
8
lists
each
of
the
signals
associated
with
the
corresponding
pins
on
the
1284
interface.
Descriptions
of
the
signals
follow.
Table
8.
1284
Signals
Pin
Source
of
Data
Type
of
Mode
Compatible
Nibble
Byte
1
Host
nStrobe
HostClk
Host/Clk
2
Host/Printer
Data
1
(LSB)
3
Host/Printer
Data
2
4
Host/Printer
Data
3
5
Host/Printer
Data
4
6
Host/Printer
Data
5
7
Host/Printer
Data
6
8
Host/Printer
Data
7
9
Host/Printer
Data
8
(MSB)
10
Printer
nAck
PtrClk
PtrClk
11
Printer
Busy
PtrBusy
PtrBusy
12
Printer
PError
AckDataReq
AckDataReq
13
Printer
Select
Xflag
Xflag
14
Host
nAutoFd
Host
Busy
HostAck
15
Not
Defined
16
Logic
Grid
17
Chassis
Grid
18
Printer
Peripheral
Logic
High
19
Signal
Ground
(nStrobe)
20
Signal
Ground
(Data
1)
21
Signal
Ground
(Data
2)
22
Signal
Ground
(Data
3)
Chapter
5.
Printer
Interfaces
215
Содержание 6500-V10 - InfoPrint 6500 Model v10 B/W Line-matrix Printer
Страница 1: ...Infoprint 6500 Line Matrix Printers User s Manual Cabinet and Pedestal Models S544 5957 00 ...
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Страница 182: ...Code V Emulation Menu 168 Infoprint 6500 User s Manual ...
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Страница 197: ...Chapter 4 The Configuration Menus 183 ...
Страница 203: ...Serial Matrix Emulation Menu Chapter 4 The Configuration Menus 189 ...
Страница 206: ...Print Format Menu 192 Infoprint 6500 User s Manual ...
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