Serial Ports A And B Connector; Figure C-4 Serial Ports A And B Connector - Sun Microsystems SPARCstation 20 Service Manual

Serial Ports A and B Connector

TABLE C-4
A and serial port B connectors.
13
25
FIGURE C-4
TABLE C-4
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
210 SPARCstation 20 Service Manual • July 1996
lists connector pin assignments and signal descriptions for the serial port
Serial Ports A and B Connector
Serial Ports A and B Connector Pin Assignments
Function I/O
N.C. None
O
Xmit Data A
I
Rec Data A
O
RTS A
I
CTS A
I
DSR A
Ground
I/O
DCD A
N.C. None
N.C. None
I
DTR B
I
DCD B
I
CTS B
O
Xmit Data B
1
14
Level Signal Description
GND Not connected
RS-232/423 Xmit data A/transmit data
port A
RS-232/423 Receive data port A
RS-232/423 Request to send port A
RS-232/423 Clear to send port A
RS-232/423 Data set ready port A
GND Signal ground
RS-232/423 Data carrier detect port A
GND Not connected
GND Not connected
RS-232/423 Data terminal ready port B
RS-232/423 Data carrier detect port B
RS-232/423 Clear to send port B
RS-232/423 Transmit data port B