Siemens PC 670 User Manual
Page 145
Hardware Information
Release 04/02
7-13
Panel PC 670 Computing Unit, Equipment Manual
Parallel interface LPT1
The parallel interface (LPT1) of the computing unit is assigned as follows:
1
13
14
25
Figure 7-3
Parallel interface LPT1 (female)
Pin No.
Short Name
Meaning
Input/Output
1
/ Strobe (CLK)
Data message
Output (open collector)
2
Data bit 0
Data line 0
Output (TTL level)
3
Data bit 1
Data line 1
Output (TTL level)
4
Data bit 2
Data line 2
Output (TTL level)
5
Data bit 3
Data line 3
Output (TTL level)
6
Data bit 4
Data line 4
Output (TTL level)
7
Data bit 5
Data line 5
Output (TTL level)
8
Data bit 6
Data line 6
Output (TTL level)
9
Data bit 7
Data line 7
Output (TTL level)
10
/ACK
Acknowledge
Input (4.7 k
W
pull up)
11
BUSY
Not ready
Input (4.7 k
W
pull up)
12
PE (PAPER END)
No paper
Input (4.7 k
W
pull up)
13
SELECT
Device selection
Input (4.7 k
W
pull up)
14
/ AUTO FEED
Automatic new line
Output (open collector)
15
/ ERROR
Device error
Input (4.7 k
W
pull up)
16
/ INIT
Reset / Initialization
Output (open collector)
17
/ SELECT IN
Printer selection
Output (open collector)
18 - 25
GND
Chassis ground
-