TDA5250D2 Datasheet, PDF (77/97 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

confidential
TDA 5250 D2
preliminary
Applications
4.9 Example for Self Polling Mode
The settings for Self Polling Mode depend very much on the timing of the
transmitted Signal. To create an example we consider following data structure
transmitted in FSK.
4 Frames
D a ta
D a ta
D a ta
50ms 50ms
400ms
D a ta
t [m s]
F ram e-
details
Pream ble
D a ta
t [ms]
Sync
Syncronisation Pream ble
t [ms]
Figure 4-34 Example for transmitted Data-structure
data_timing011.wmf
According to existing synchronization techniques there are some
synchronization bursts in front of the data added (code violation!). A minimum
of 4 Frames is transmitted. Data are preferably Manchester encoded to get
fastest respond out of the Data Rate Detection.
Target Application:
- received Signal has code violation as described before
- total mean current consumption below 1mA
- data reception within max. 400ms after first transmitted frame
Wireless Components
4 - 37
Specification, July 2002