886LCD-M Family
KTD-00474-E
Public User Manual
Date: 2005-05-24
Page
38 of 78
4.7 Printer
Port
Connector (PRINTER).
The printer port connector is provided in a standard DB25 pinout.
The signal definition in standard printer port mode is as follows:
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
2K2
(24)/24
OC(O)
STB# 1
14
AFD#
OC(O)
(24)/24
2K2
2K2
24/24
IO
PD0 2
15
ERR#
I
-
2K2
2K2
24/24
IO
PD1 3
16
INIT#
OC(O)
(24)/24
2K2
2K2
24/24
IO
PD2 4
17
SLIN#
OC(O)
(24)/24
2K2
2K2
24/24
IO
PD3 5
18
GND
PWR
-
-
2K2
24/24
IO
PD4 6
19
GND
PWR
-
-
2K2
24/24
IO
PD5 7
20
GND
PWR
-
-
2K2
24/24
IO
PD6 8
21
GND
PWR
-
-
2K2
24/24
IO
PD7 9
22
GND
PWR
-
-
2K2
-
I
ACK# 10
23
GND
PWR
-
-
2K2
-
I
BUSY 11
24
GND
PWR
-
-
2K2
-
I
PE 12
25
GND
PWR
-
-
2K2
-
I
SLCT
13
The interpretation of the signals in standard Centronics mode (SPP) with a printer attached is as follows:
Signal
Description
PD7..0
Parallel data bus from PC board to printer. The data lines are able to operate in PS/2
compatible bi-directional mode.
SLIN#
Signal to select the printer sent from CPU board to printer.
SLCT
Signal from printer to indicate that the printer is selected.
STB#
This signal indicates to the printer that data at PD7..0 are valid.
BUSY
Signal from printer indicating that the printer cannot accept further data.
ACK#
Signal from printer indicating that the printer has received the data and is ready to accept
further data.
INIT#
This active low output initializes (resets) the printer.
AFD#
This active low output causes the printer to add a line feed after each line printed.
ERR#
Signal from printer indicating that an error has been detected.
PE#
Signal from printer indicating that the printer is out of paper.
The printer port additionally supports operation in the EPP and ECP mode as defined in [3].