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Section
5
CONNECTOR PINOUTS
Utility Serial Port Pin Assignments
Connections to the Debug/Utility port can be made using the supplied cable. A Data Terminal Equipment
RS-232C interface is provided. A transition cable is supplied which converts between the 14-pin header
(P3) and a female shell (male pin) 25-pin D-Shell connector.
DB 25 Pin
21-25
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Table 12: Utility Serial Port Pin Assignments
Dir
Circuit
1
-
AA
2
Out
BA
3
In
BB
4
Out
CA
5
In
CB
6
In
CC
7
-
AB
8-13
14
Out
SBA
15
16
In
SBB
17
18
19
20
Out
CD
Extensible Single Board Computer/Controller User's Manual 75
P3 Pin
Description
1
Protective Ground (Shield)
3
Port A Transmitted Data
5
Port A Received Data
7
Port A Request To Send
9
Port A Clear To Send
11
Port A Data Set Ready
13
Signal Ground (Common Return)
2
Port B Transmitted Data (Secondary)
4
6
Port B Received Data (Secondary)
8
10
12
14
Port A Data Terminal Ready
Unused
Unused
Unused
Unused
Unused
Unused
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