TDA5252G2 Datasheet, PDF (69/86 Pages) Infineon Technologies AG – ASK/FSK 915MHz Wireless Transceiver

TDA5252 G2
Version 1.1
Application
4 Frames
Data
Data
Data
50ms 50ms
400ms
Data
t [ms]
Frame-
details
Preamble
Data
t [ms]
Sync
Syncronisation Preamble
t [ms]
data_timing011.wmf
Figure 3-31 Example for transmitted Data-structure
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
One possible Solution:
t_ON = 15ms, t_OFF= 135ms
This gives 15ms ON time of a total period of 150ms which results in max. 0.9mA mean current
consumption in Self Polling Mode. The resulting worst case timing is shown in the following figure:
Data Sheet
69
2007-02-26