PACS1284
Application Information (continued)
Table 2
provides the IEEE 1284 signal assignments for
the three connectors, and example PACS1284 pin con-
nections.
When connecting a 1284-A host to a 1284-B periph-
eral, the “Peripheral Logic High” signal is not used.
Similarly, when a 1284-A host is connected to a 1284-
C peripheral, the “Peripheral Logic High” and “Host
Logic High” are not used. These two signals are
optionally used to detect a “Power Off” or “Cable Dis-
connect” state for host and peripheral, respectively.
Table 2: IEEE 1284 Connector Pinouts and PACS1284 Connection Guidelines
PACS1284
PIN TYPE
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
P-Port conn. side, series-terminated (16-19, 21, or 23-26)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
Capacitor-filtered (1, 2, 8, 10, 12, 15, 27, or 28)
1284-A
25-PIN DSUB
SIGNAL
STROBE
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
ACK
BUSY
PError
Select
AUTOFD
FAULT
INIT
Selectin
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1284-B
36-PIN CHAMP
SIGNAL
STROBE
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
ACK
BUSY
PError
Select
AUTOFD
FAULT
INIT
Selectin
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Not Defined
Not Defined
Not Defined
Not Defined
Logic Ground
Chassis GND
Peripheral Logic
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
32
31
36
19
20
21
22
23
24
25
26
27
28
29
30
33
34
35
15
16
17
18
1284-C
36-PIN HIGH
DENSITY
SIGNAL
STROBE
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
ACK
BUSY
PError
Select
AUTOFD
FAULT
INIT
Selectin
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Not Required
Host Logic High
PIN
15
6
7
8
9
10
11
12
13
3
1
5
2
17
4
14
16
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
18
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06/07/04
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