User Manual
2014 Cervis, Inc.
i
Table of Contents
Table of Contents .......................................................................................................................... i
List of Figures ............................................................................................................................... i
List of Tables ................................................................................................................................. i
Cervis Inc. Safety Precautions ................................................................................................... 1
1.0
Introduction .......................................................................................................................... 2
1.1
Features ............................................................................................................................. 2
1.2
Dimensions (mils)/Locations ........................................................................................... 3
1.3
Pinout ................................................................................................................................. 3
2.0
Installation ............................................................................................................................ 4
3.0
Tune-up Procedure .............................................................................................................. 4
4.0
Electrical Characteristics .................................................................................................... 5
4.1
Power ................................................................................................................................. 5
4.2
SPI Mode ............................................................................................................................ 5
4.3
UART Mode ........................................................................................................................ 5
5.0
RF Characteristics ............................................................................................................... 6
6.0
Operational Modes ............................................................................................................... 7
6.1
Push-To-Transmit Mode ................................................................................................... 7
6.2
Periodic Transmit Mode ................................................................................................... 7
7.0
Communication Protocol .................................................................................................... 8
7.1
SPI ...................................................................................................................................... 8
7.2
UART .................................................................................................................................. 8
7.3
Acknowledgement ............................................................................................................ 9
8.0
Messages ............................................................................................................................ 10
8.1
Get / Set Parameter ......................................................................................................... 10
8.2
Transmit ........................................................................................................................... 12
8.3
Receive ............................................................................................................................ 13
8.4
Error ................................................................................................................................. 14
List of Figures
Figure 1. MRF450 Front and Back ................................................................................................ 2
Figure 2. Dimensions (mils)/Locations ........................................................................................ 3
Figure 3. State Transitions vs. Current Consumption................................................................ 5
List of Tables
Table 1. P1, P2, and P3 Pinout ...................................................................................................... 3
Table 2. Recommended Baud Rates and Associated Deviation ............................................... 6
Table 3. OTA Structure Format ..................................................................................................... 6
Table 4. Packet Format Diagram................................................................................................... 8
Table 5. Message IDs and Structures ........................................................................................ 10
Table 6. Parameter ID Assignment and Data Lengths ............................................................. 10
Table 7. Configurable Parameters .............................................................................................. 10
Table 8. Transmit ID, Reply ......................................................................................................... 12
