TDA5240 Datasheet, PDF (105/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Functional Description
Timeout timers for getting no TSI or getting no EOM within a certain time period can be
used to avoid a deadlock situation, e.g. TOTIM_TSI can be used in case an interfering
transmit signal fulfilled the wake-up criterion and keeps on transmitting, but no TSI can
be found in this data stream within a certain programmable time period. TOTIM_EOM
might be used in case EOM criterion “EOM by payload data length” cannot be applied.
The timeout timer functionality in the absence/presence of an interfering signal is shown
in Figure 75 and Figure 76.
Without interfering signal:
WU frame and Payload frame have the same modulation type
e.g. TOTIM_TSI is set to 15ms
TX signal
Wake-up
RX_RUN
RI TSI Payload1
RI TSI Payload2
WU-data Interrupt
RunMode SelfPolling
SelfPolling / Sleep
Init TOTIMs
TOTIM_SYNC
counter activity
TOTIM_TSI
counter activity
9 .5ms
5ms
5ms
TOTIM_EOM
counter activity
Figure 75 TOTIM Behavior without Presence of Interferer
Data Sheet
105
V4.0, 2010-02-19