
7 External Connections
The
The available input signals for AUXIN are Clear To Send (CTS) and the Receive Clock (RCLK). The available output signals for AUXOUT are Request To Send (RTS), the Transmit Clock (TCLK), and the AUXIN signal (for loopback). Either
Configuration is done using jumpers J10 through J23 for interface signal routing. Each jumper block provides the same functions for its particular channel. All below examples are for Channel 1. Channel 2 is the same but different sets of jumpers. See Figure 15 for Channel 2 jumpers.
Channel | Signal routing |
Port 1 | |
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Port 2 | |
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Figure 15 --- Jumper/Channel correspondence
7.1 RTS/CTS Handshake
Transmission of RTS, combined with reception of CTS, allows for hardware handshaking (data flow control) between the UART and the external device. RTS is transmitted on AUXOUT by not connecting pins 1 and 2 of the jumper blocks
Jumpers J10-12
J10 CTS0_SEL
J11 AUX0_SEL0
J12AUX0_SEL1
Transmit RTS on AUXOUT Receive CTS on AUXIN
J10 CTS0_SEL
J11 AUX0_SEL0
J12AUX0_SEL1
Loopback RTS to CTS
Figure 16 --- RTS/CTS selection
Quatech | 33 |