PC串行口引腳定義圖
PC/AT 機(jī)上的串行口是 9 針公插座，引腳定義為：
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
1 |
CD |
Carrier Detect | |
|
2 |
RXD |
Receive Data | |
|
3 |
TXD |
Transmit Data | |
|
4 |
DTR |
||
|
5 |
GND |
System Ground | |
|
6 |
DSR |
Data Set Ready | |
|
7 |
RTS |
Request to Send | |
|
8 |
CTS |
Clear to Send | |
|
9 |
RI |
Ring Indicator |
PC/XT 機(jī)上的串行口是 25 針公插座，引腳定義為：
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
1 |
SHIELD |
- |
Shield Ground |
|
2 |
TXD |
Transmit Data | |
|
3 |
RXD |
Receive Data | |
|
4 |
RTS |
Request to Send | |
|
5 |
CTS |
Clear to Send | |
|
6 |
DSR |
Data Set Ready | |
|
7 |
GND |
- |
System Ground |
|
8 |
CD |
Carrier Detect | |
|
9 |
n/c |
- |
|
|
10 |
n/c |
- |
|
|
11 |
n/c |
- |
|
|
12 |
n/c |
- |
|
|
13 |
n/c |
- |
|
|
14 |
n/c |
- |
|
|
15 |
n/c |
- |
|
|
16 |
n/c |
- |
|
|
17 |
n/c |
- |
|
|
18 |
n/c |
- |
|
|
19 |
n/c |
- |
|
|
20 |
DTR |
Data Terminal Ready | |
|
21 |
n/c |
- |
|
|
22 |
RI |
Ring Indicator | |
|
23 |
n/c |
- |
|
|
24 |
n/c |
- |
|
|
25 |
n/c |
- |
|