ZAURA Datasheet, PDF (20/99 Pages) –

ZAURA RF Wireless Library
Programmer’s Reference Manual
8
so that the application only has to process the length of the application
data.
The DA field contains the 8-bit target address of this frame. Addresses
0x01 to 0xFE identify unique nodes within the ZAURA RF Wireless cell.
Address 0x00 is reserved and must not be used as a node address or sent
in the DA or SA address of any frame. Address 0xFF is used to broadcast
data to all nodes within the same ZAURA RF Wireless cell that are in
radio range of the transmitter. The ZAURA RF Wireless Module will only
receive a frame targeting the broadcast address or its unique 8-bit address.
Promiscuous packet reception is not supported.
The Data field contains up to 58 bytes of application data. The ZAURA
RF Wireless Module does not examine or interpret the Data field during
packet transmission or reception.
Limitations and Utility of the DA Format. The DA frame format
includes the least amount of RF header bytes and will be able to achieve
the highest effective data rate of any of the ZAURA RF Wireless frame
formats. This frame format is most useful in applications where data flow
is either unidirectional or all broadcast. In these applications, knowing the
identity of the node that transmitted the frame is not required.
This data transfer mode is also useful in customer applications that use a
proprietary frame format and protocol. The application is free to define
additional header bytes within the ZAURA RF data fields.
Reliable ZAURA RF data services cannot be used with the DA frame for-
mat. Successful transmission of a frame using the DA frame format does
not imply that the target actually received the frame; it only implies that
no errors were encountered during transmission.
DA_SA Frame Format
The only difference between the DA_SA frame format and the DA format
is the addition of a Source Address (SA), as shown in Figure 2.
The ZAURA RF Wireless Library
RM006003-1011