ZAURA Datasheet, PDF (21/99 Pages) –

ZAURA RF Wireless Library
Programmer’s Reference Manual
9
PA(2) NID(1–4) Len(1)
DA(1)
SA(1) Data(58) CRC(2)
Figure 2. Fields within the DA_SA Frame
The ZAURA RF Wireless Library adds the SA field to all transmitted
frames and makes the SA available to the application on all received
packets.
Limitations and Utility of the DA_SA Format. The DA_SA format
allows the recipient of a frame to know the identity of the node that trans-
mitted the frame. This frame format is useful in applications that require
unreliable bidirectional communications or point-to-point communication
between unique nodes.
As with the DA format, the DA_SA format also allows the use of broad-
cast traffic (point-multipoint) and cannot be used with the ZAURA RF
reliable data transfer protocol.
DA_SA_CTRL Frame Format
The DA_SA_CTRL frame format uses a 3-byte RF header consisting of
the destination address (DA), source address (SA) and the Control
(CTRL) field. The DA and SA fields are identical to the corresponding
fields in the DA_SA frame format, and the control field is used to identify
the type of frame being transmitted as well as the target Service Access
Point (SAP).
The ZAURA RF Library uses the following frame types:
DATA. Used to transmit application data on a best-effort basis (unreliable
data transmission)
RM006003-1011
Frame Formats