Impulse 7804e - Manual (Page 19)

©Sealevel Systems, Inc.
SL9219 - 06/2011
7804e Manual 19
Signal Name Pin # Mode
GND Ground 5
TD Transmit Data 3 Output
RTS Request To Send 7 Output
DTR Data Terminal Ready 4 Output
RD Receive Data 2 Input
CTS Clear To Send 8 Input
DSR Data Set Ready 6 Input
DCD Data Carrier Detect 1 Input
RI Ring Indicator 9 Input
Please terminate any control signals that are not going to be used. The most common
way to do this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR.
Terminating these pins, if not used, will help ensure you get the best performance from
your adapter.