Xycom XVME-976/202, Manual

Page: 35 / 87

Chapter 2 – SSP Installation (XVME-956/400)
2-9
mode. It is the responsibility of the user's software to provide a protocol that
can handle the bi-directional nature of the interface. The four handshake in-
put signals (RI, CTS, DSR, and DCD) are tied active by the jumpers in-
stalled at W11, W12, W13, and W14 when this port is configured for RS-
485 (refer to Tables 2-10 and 2-11).
Parallel Port Configuration and Connection
Table 2-16 lists the connector pin assignments for the parallel port at J3. In
addition to the pins of connector J3, Table 2-16 also lists the corresponding
pins for the DB25F parallel connector cable supplied with the unit. The
pinout of J3 is such that it allows the use of a flat ribbon cable between J3
and a PC/AT compatible DB25F parallel connector.
Table 2-16 . J3 Pin Assignment
Signal Name Function In/Out J3 Pin DB25f Pin
-STROBE
Data 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
-ACK
BUSY
PAPER EMPTY
SEL OUT
Output data strobe
Data bit (LSB)
:
:
:
:
:
:
Data bit (MSB)
Character accepted
Cannot receive data
Out of paper
Printer selected
out
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
in
in
in
in
1
3
5
7
9
11
13
15
17
19
21
23
25
1
2
3
4
5
6
7
8
9
10
11
12
13
-AUTOFD
-ERROR
-INIT
-SEL IN
-POE
Auto feed
Printer error
Initialize printer
Selects printer
Port output enable
out
in
out
out
in
2
4
6
8
26
14
15
16
17
--
GND Signal ground --- 10, 12
14, 16
18, 20
22, 24 18-25