Lexmark Printer User Manual page 346

Table 8-1: Parallel Connector Pin Assignments
Pin
Signal
1 15 STROBE*
Inverted logic: signal
is active when low
2–9 6–13 DATA0 through
DATA7
10 3 ACKNLG*
Inverted logic: signal
is active when low
11 1 BUSY
12 5 PE
13 2 SLCT
14 17 AUTO FEED XT*
Inverted logic: signal
is active when low.
15-17 N/A LOGIC GROUND
N/A means non-applicable.
•
To prevent line noise, the cables should be shielded and connected to the
chassis of both the computer and the printer. The parallel cable length should
not exceed 3.04 m (10 ft), unless a Lexmark 6.1 m (20 ft) parallel cable is
used.
Direction Description
In The computer generates this signal to allow the printer to read in data.
The signal level is normally high: data is sampled at the falling edge of
this pulse.
In/Out These signals represent data bits 0 to 7, respectively. Each signal is at a
high level when data is logical 1, and low when data is logical 0. Pin 2 is
the least significant bit.
Note: Data is driven out only when the printer is in IEEE 1284 Byte or
ECP modes.
Out This negative pulse indicates the printer can again accept data.
Out A high signal indicates the printer cannot receive data. The signal is
high:
• During initialization
• During data sampling
• When the buffer is full
• In the not ready state
• During a printer error
A low signal indicates the printer is not busy and the computer can again
send data.
Out Paper Exception signal indicates no paper is loaded, a paper jam exists,
or a paper feed error occurred.
Out Select signal indicates the printer is selected and is online. This signal is
normally active. It becomes inactive when the printer is offline.
In Host Busy when
Logic Ground
8-9
is .
Advanced Status On
Interfaces