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6. Hardware Information
6.1 Auxiliary Channel Configuration
An auxiliary channel is provided which allows for handshaking between the
SSP-200/300 port and a peripheral device. This auxiliary channel may be configured in
one of two ways:
v RTS-CTS handshake enabled.
v handshaking is disabled.
6.1.1 Auxiliary Channel: RTS-CTS Handshaking.
The RTS-CTS handshake may be enabled so that RTS (request to send) is the auxiliary
output signal on AUX OUT+ (pin 1) and AUX OUT- (pin 6). Similarly, CTS (clear to
send) is the auxiliary input signal on AUX IN+ (pin 5) and AUX IN- (pin 9). This
configuration is shown below.
RS-422/485
+
+
+
+
-
-
-
-
16C750
UART
DATA OUT
DATA IN
AUX OUT
AUX IN
TXD
RXD
-RTS
-CTS
Drivers/Receivers
Driver
Receiver
Driver
Receiver
Figure 0. Auxiliary Channel RTS-CTS Handshaking
Hardware Information 6-1