Reference For The Serial Port A And B Connectors; Serial Port Connector Diagram; Serial Port Signals - Sun Microsystems Fire V890 Service Manual

Reference for the Serial Port A and B
Connectors
The serial port conforms to EIA-423 and EIA-232D specifications.

Serial Port Connector Diagram

Serial Port Signals

Signal descriptions ending in "A" indicate that the signal is associated with the port
provided by a standard DB-25 serial cable or the connector labeled "A" on the
optional DB-25 splitter cable. Signal descriptions ending in "B" indicate that the
signal is associated with the port provided by the connector labeled "B" on the
optional DB-25 splitter cable.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
298 Sun Fire V890 Server Service Manual • October 2005
13
A/B
25
Signal Description
No Connection
Transmit Data A
Receive Data A
Ready To Send A
Clear To Send A
Synchronous A
Signal Ground A
Data Carrier Detect A
No Connection
No Connection
Data Terminal Ready B
Data Carrier Detect B
Clear To Send B
1
14
Pin Signal Description
14 Transmit Data B
15 Transmit Clock A (External)
16 Receive Data B
17 Receive Clock A
18 Receive Clock B
19 Ready To Send B
20 Data Terminal Ready A
21 No Connection
22 No Connection
23 No Connection
24 Transmit Clock A (Internal)
25 Transmit Clock B