Pin Specifications for the Ports on the BA42B System
Table A–1 Asynchronous Port A and Port B Pin Specifications for the Eight-
Data and 16-Data Line Options
Port A
Port B
1
Contact
Signal Name
2
Signal Name
2
1
LINE 0 TRANSMIT H
LINE 8 TRANSMIT H
2
LINE 0 RECEIVE H
LINE 8 RECEIVE H
3
LINE 1 TRANSMIT H
LINE 9 TRANSMIT H
4
LINE 1 RECEIVE H
LINE 9 RECEIVE H
5
LINE 2 TRANSMIT H
LINE 10 TRANSMIT H
6
LINE 2 RECEIVE H
LINE 10 RECEIVE H
7
LINE 3 TRANSMIT H
LINE 11 TRANSMIT H
8
LINE 3 RECEIVE H
LINE 11 RECEIVE H
9
LINE 4 TRANSMIT H
LINE 12 TRANSMIT H
10
LINE 4 RECEIVE H
LINE 12 RECEIVE H
11
LINE 5 TRANSMIT H
LINE 13 TRANSMIT H
12
LINE 5 RECEIVE H
LINE 13 RECEIVE H
13
LINE 6 TRANSMIT H
LINE 14 TRANSMIT H
14
LINE 6 RECEIVE H
LINE 14 RECEIVE H
15
LINE 7 TRANSMIT H
LINE 15 TRANSMIT H
16
LINE 7 RECEIVE H
LINE 15 RECEIVE H
17
150 OHMS TO GROUND
150 OHMS TO GROUND
18
150 OHMS TO GROUND
150 OHMS TO GROUND
19
LINE 0 TRANSMIT L
LINE 8 TRANSMIT L
20
LINE 0 RECEIVE L
LINE 8 RECEIVE L
21
LINE 1 TRANSMIT L
LINE 9 TRANSMIT L
22
LINE 1 RECEIVE L
LINE 9 RECEIVE L
23
LINE 2 TRANSMIT L
LINE 10 TRANSMIT L
24
LINE 2 RECEIVE L
LINE 10 RECEIVE L
25
LINE 3 TRANSMIT L
LINE 11 TRANSMIT L
26
LINE 3 RECEIVE L
LINE 11 RECEIVE L
1
Not applicable to eight-data line option.
2
The signal names ending with L are active low; the signal names ending with H are active high.
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Pin Specifications for the Ports on the BA42B System A–3
