Physical Layer; Db-9 Rs232 Connector; Serial Port Driver; Errors - Lexicon RV8 V1.0 - SERIAL COMMUNICATIONS PROTOCOL DEFINITION REV 1-7 Manual

Lexicon, Inc.
RV-8 Serial Communications Protocol
changes. Each transaction initiated must wait for a corresponding response before initiating the next
transmission.
The 3 protocol layers are: Physical, Data Link, and Application Layers.
Physical Layer (RS232)

5 Physical Layer

5.1 DB-9 RS232 Connector

RV8
COM1
Transmit Data
2
Receive Data
3
5
Ground
9 Pin D-Shell (female)
Note: The wiring requirements for a 9 pin to 9 pin serial connection, are a male to female straight through
cable.

5.2 Serial Port Driver

RV8 serial port has been setup to operate as follows:
Operating Mode:
Baud rate:
Data Size:
Parity:
Stop Bits:
Hardware Handshaking:

5.3 Errors

The RV8 will detect parity, framing and data overrun errors. If any of the physical layer errors are detected,
the complete packet is corrupted and the RV8 will reset the transaction and begin to look for a start of
packet byte.
© 2004 Lexicon, Inc. All rights reserved.
Data Link Layer
Application Layer
9 Pin D-Shell (female)
2
3
5
9 Pin D-Shell (male)
Host
2 2
3 3
5 5
Full Duplex
19.2K baud
8 bits (1 byte)
Odd
1
None
Printed on: 01/18/05
Receive Data
Transmit Data
Ground
9 Pin D-Shell (male)
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