Table of Contents
Advertisement
B
B.1.2 Serial Ports A and B (RS-422/RS-232)
Pin
Signal Name
1
Not connected
2
Transmit Data
3
Receive Data
4
Ready To Send
5
Clear To Send
6
Data Set Ready
7
Signal Ground
8
Data Carrier Detect
9
Not connected
10
Not connected
11
Not connected
12
Not connected
13
Not connected
B-2
These connectors are located on the back panel of system board.
13
25
Figure B-2
Serial Ports A and B Connector
Table B-2 Serial Ports Pin Assignments
Description
none
TxD
RxD
RTS
CTS
DSR
Gnd
DCD
none
none
none
none
none
Sun Ultra 1 Series Service Manual—November 1995
1
14
Pin
Signal Name
14
Not connected
15
Transmit Clock
16
Not connected
17
Receive Clock
18
Not connected
19
Not connected
20
Data Terminal
Ready
21
Not connected
22
Not connected
23
Not connected
24
Transmit Clock
25
Not connected
Description
none
TRxC
none
RTxC
none
none
DTR
none
none
none
TxC
none
Advertisement
Table of Contents
