Physical Layer; Db-9 Rs232 Connector; Serial Port Driver; Errors - Lexicon RV-8 V2.0 - SERIAL PROTOCOL DEFINITIONS REV 1-8 Manual

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initiates indicating system 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.
Data Link Layer
Application Layer
9 Pin D-Shell (female)
2
3
5
9 Pin D-Shell (male)
RV-8 Serial Communications Protocol
Host
2 2
3 3
5 5
Full Duplex
19.2K baud
8 bits (1 byte)
Odd
1
None
Receive Data
Transmit Data
Ground
9 Pin D-Shell (male)
6