Ampro Corporation Littleboard 550 Manuel D’Utilisation
Chapter 3
Hardware
42
Reference Manual
LittleBoard 550
Parallel Port Interface (J15)
Parallel port supports standard parallel, Bi-directional, ECP and EPP protocols. The VIA Southbridge
provides the parallel port interface signals.
provides the parallel port interface signals.
Table 3-13. Parallel Interface Pin/Signal Descriptions (J15)
Pin # Signal
In/Out Description
1
Strobe*
Out
Strobe* – This is an output signal used to strobe data into the printer.
I/O pin in ECP/EPP mode.
I/O pin in ECP/EPP mode.
2
AUTOFDX*
Out
Auto Feed * – This is a request signal into the printer to automatically
feed one line after each line is printed.
feed one line after each line is printed.
3
PD0
I/O
Parallel Port Data 0 – This pin (0 to 7) provides parallel port data
signals.
signals.
4
ERR*
Out
Error – This printer output status indicates an error condition on the
printer if the signal state is Low.
printer if the signal state is Low.
5
PD1
I/O
Parallel Port Data 1 – Refer to pin 3 for more information.
6
INIT*
Out
Initialize * – This signal is used to Initialize printer. Output in
standard mode, I/O in ECP/EPP mode.
standard mode, I/O in ECP/EPP mode.
7
PD2
I/O
Parallel Port Data 2 – Refer to pin 3 for more information.
8
SLCTIN
Out
Select In – This output signal is used to select the printer. I/O pin in
ECP/EPP mode.
ECP/EPP mode.
9
PD3
I/O
Parallel Port Data 3 – Refer to pin 3 for more information.
10
GND
Ground
11
PD4
I/O
Parallel Port Data 4 – Refer to pin 3 for more information.
12
GND
Ground
13
PD5
I/O
Parallel Port Data 5 – Refer to pin 3 for more information.
14
GND
Ground
15
PD6
I/O
Parallel Port Data 6 – Refer to pin 3 for more information.
16
GND
Ground
17
PD7
I/O
Parallel Port Data 7 – Refer to pin 3 for more information.
18
GND
Ground
19
ACK*
In
Acknowledge * – This printer output status indicates it has received
the data and is ready to accept new data if the signal state is Low.
the data and is ready to accept new data if the signal state is Low.
20
GND
Ground
21
BUSY
In
Busy – This printer output status indicates the printer is not ready to
accept data if the signal state is High.
accept data if the signal state is High.
22
GND
Ground
23
PE
In
Paper End – This printer output status indicates the printer is out of
paper if the signal state is High.
paper if the signal state is High.
24
GND
Ground
25
SLCT
In
Select – This printer output status indicates the printer is selected and
powered on if the signal state is High.
powered on if the signal state is High.
26
GND
Ground
Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.