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Full-Duplex Operation
1
2
36
5
4
RTS
DTR
Tx ENABLE
Tx ENABLE
Tx ENABLE
Rx ENABLE
Half-Duplex(DTR) Operation
1
2
36
5
4
RTS
DTR
Tx ENABLE
Tx ENABLE
Tx ENABLE Rx ENABLE
Half-Duplex(RTS) Operation
1
2
3
6
5
4
RTS
DTR
Tx ENABLE
Tx ENABLE
Tx ENABLE
Rx ENABLE
Jumpers J6, J8
Figure 23 --- Half- or full-duplex selection
AUXOUT
AUXIN
RS-422 or
RS-485
Receiver
+
-
TXEN
RXEN
1
2
36
5
4
1
2
36
5
4
XCLK
RTS
CTS
RCLK
DTR
DSR
DCD
RI
+
-
RS-422 or
RS-485
Driver
Figure 24 --- Output control block diagram
Quatech DSC
-200/300 User
'
s Manual
33