Rts/Cts Handshake; Rclk - Quatech DSCLP-200 User Manual

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 J11-12. CTS is received on AUXIN by not connecting pins 1 and 2
of the jumper block J10. If RTS/CTS handshaking is not desired, the RTS output
can be looped back to the CTS input by connecting pins 1 and 2 of the jumper
block J10. Figure 16 shows how to select the RTS/CTS mode.
J10
CTS0_SEL
AUX0_SEL0
J11
AUX0_SEL1
J12
Transmit RTS on AUXOUT
Receive CTS on AUXIN

7.2 RCLK

This is the clock signal used by the receiver portion of the UART. It is
generally provided by connecting it to the UART's own transmit clock output
(TCLK). This is done by not connecting pins 1 and 2 of the jumper block J13. If
desired, RCLK can be received from an external source over the AUXIN line by
connecting pins 1 and 2 of the jumper block J13. Figure 17 shows how to select
the RCLK mode.
J13 RCLK0_SEL
Loopback TCLK to RCLK
DSCLP/SSCLP-200/300 User's Manual
Jumpers J10-12
J10
J11
J12
Figure 16 --- RTS/CTS selection
Jumper J13
J13
Figure 17 --- RCLK selection
CTS0_SEL
AUX0_SEL0
AUX0_SEL1
Loopback RTS to CTS
RCLK0_SEL
Receive RCLK on AUXIN
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