Centronics Signals And Pin Assignments - Xerox 4213 Programmer's Reference Manual

INTERFACES

Centronics signals and pin assignments

1-4
Table 1-2 describes Centronics 100 signals and pin assignments.
Table 1-2.
Pin Direction
1 To printer
2 To printer
3 To printer
4 To printer
5 To printer
6 To printer
7 To printer
8 To printer
9 To printer
10 From printer
11 From printer
12 From printer
13 From printer
14
15 Printer to stunt
box
16 0 volts
Centronics signals and pin assignments
Signal Description
STROBE L STROBE pulse low to read data. A strobe
low signal raises BUSY line to high.
1
DATA BIT 1
1
DATA BIT 2
1
DATA BIT 3
1
DATA BIT 4
DATA BIT 5 1
1
DATA BIT 6
1
DATA BIT 7
1
DATA BIT 8
ACKNLG L ACKNLG pulse low indicates data was
received and printer is ready to receive
more data.
BUSY H BUSY "high" indicates the printer cannot
receive data, (buffer is full). BUSY high
occurs when an error condition exists.
PE H Ground
SLCT H A high signal indicates the printer is in
the select state.
A low signal occurs when the printer is
deselected or if an error condition exists.
Ground (standard Centronics)
2 MHz Field stunt box clock. The stunt
box is not provided by Xerox.
Logic ground
XEROX 4213 LASER PRINTER PROGRAMMER REFERENCE