TDA5230 Datasheet, PDF (106/186 Pages) Infineon Technologies AG – Universal Low Power ASK/FSK Single Conversion Multi-Channel Image-Reject Receiver

TDA523x
Some examples of TSI patterns:
0000000000000001
0000000000000011
0000000000000010
1111111111111110
Functional Description
When CVs are used:
0000000000000M1
00000000000001M
111111111111110M
Note: CVs in a TSI are practical for better differentiation to the real data, especially if
repetition of data frames is used for wake up.
End of Message (EOM) Detection
An End Of Message (EOM) detection feature is provided by the EOM detector. Three
criteria can be selected to indicate EOM. The first is based on the number of received
bits since frame synchronization. The number of expected bits is preset in the
EOMDTLEN register. Sending fewer bits as defined in the register will result in no EOM.
The EOM counter will be reset after new frame synchronization. The second criterion is
the detection of a Manchester Code Violation. The third criterion is the loss of symbol-
synchronization. Depending on the TVWIN register, the Sync signal persists for a certain
amount of time after the end of the Pattern has been reached. Therefore, more bits could
be written into the FIFO than sent. All three EOM criteria can be combined with each
other. If one of the selected EOM criteria is fulfilled an EOM signal will be generated.
Dual: ATSIMODE and BTSIMODE: TSI Detection Mode
ADDR: 0x82 and 0xA2
Reset Value: 0x00
Bit R/W Description
7 W TSIGRSYN: TSI Gap Resync Mode (For detailed information, see
ATSIGAP/BTSIGAP register description)
0: OFF
1: PLL reset after TSI Gap
6:3 W TSIWCA: Wild Cards for Correlator A
Data Sheet
102
Version 4.0, 2007-06-01