PC串列口引腳定義

admin @ 2014-03-26 , reply:0

PC/AT 機上的串列口是 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

Data Terminal Ready

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 機上的串列口是 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

-

 




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