Datasheet

66
Chapter 1
N
Personal Computer System Components
FIGURE 1.47 Standard DE-9 and DB-25 male serial ports
FIGURE 1.48 A standard serial cable wiring diagram
2
3
4
5
6
7
8
20
22
3
2
7
8
6
5
1
4
9
Pin#
51
96
113
14 25
Pin#
DB-25
Male
DB-9
Female
FIGURE 1.49 A null modem serial cable wiring diagram
Pin#
5
2
3
7
8
6
1
4
5
3
2
8
7
4
6
1
Pin#
DB-9
Female
51
96
DB-9
Female
51
96
Finally, because of the two different device connectors (DE-9M and DB-25M), serial
cables have a few different configurations. Table 1.4 shows the most common serial cable
configurations.
86498book.indb 66 7/22/09 5:37:54 AM