DB-25
Pin Number
EIA-232 Signal
DB-25 Male Connector
2
TxD (A)
14
TxD (B)
3
RxD (A)
16
RxD (B)
15
TxCLKIN (A)
12
TxCLKIN (B)
17
RxCLK (A)
9
RxCLK (B)
4
RTS
5
CTS
20
DTR
6
DSR
8
DCD
24
TxCLKOUT (A)
11
TxCLKOUT (B)
7
GND
1 and shell
CGND
Use these diagrams as a reference when building or purchasing EIA-232 cables. See Tips for Building and Purchasing Cables for cable length and quality concerns.
|
DB-25 |
EIA-232 Signal |
DB-25 Male Connector
|
|
2 |
TxD (A) |
|
|
14 |
TxD (B) |
|
|
3 |
RxD (A) |
|
|
16 |
RxD (B) |
|
|
15 |
TxCLKIN (A) |
|
|
12 |
TxCLKIN (B) |
|
|
17 |
RxCLK (A) |
|
|
9 |
RxCLK (B) |
|
|
4 |
RTS |
|
|
5 |
CTS |
|
|
20 |
DTR |
|
|
6 |
DSR |
|
|
8 |
DCD |
|
|
24 |
TxCLKOUT (A) |
|
|
11 |
TxCLKOUT (B) |
|
|
7 |
GND |
|
|
1 and shell |
CGND |