原创 9针及25针串口引脚定义

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

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

-