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Appendix燘:燚evelopment燝uide
RS-232 Pin Signals
Figure燘03. Pins爑sed爋n爐he爁emale燫S232?DB9)燬erial燙onnector牋
*燜unctions爈isted爄n爐he爄mplementation燾olumn爉ay爊ot燽e燼vailable燼t爐he爐ime爋f爎elease.
Table燘02. Pin燗ssignments燼nd營mplementations
DB-9 Pin
RS-232 Name
Description
Implementation
1
DCD
Data-Carrier-Detect
Connected to DSR (pin6)
2
RXD
Receive Data
Serial data exiting the module assembly
(to host)
3
TXD
Transmit Data
Serial data entering into the module assembly
(from host)
4
DTR
Data-Terminal-Ready
Can enable Power-down on the module assembly
5
GND
Ground Signal
Ground
6
DSR
Data-Set-Ready
Connected to DCD (pin1)
7
RTS
/ CMD
Request-to-Send /
Command Mode
Enables RTS
flow control or
Command Mode
8
CTS
Clear-to-Send
Provides CTS
flow control
9
RI
Ring Indicator
Optional power input that is connected internally to
the positive lead of the front power connector
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