tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 106

• Manufacturer Part Number: tda5235
• Description: Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
• Manufacturer: Infineon Technologies Corporation

Figure 76
On expiring of one of the timeout timers, the receiver proceeds with Self Polling Mode
and with searching for a suitable wake-up criterion on the next configuration or a search
for a wake-up criterion in Configuration A is initiated.
As long as the chip is in Run Mode Self Polling, incoming data frames (including a
RUNIN sequence and TSI, but without necessity of additional wake-up patterns) can be
received and stored.
The data FIFO can be initialized and cleared either at
•
•
Further information about the Receive FIFO can be found in the
FIFO.
After an EOM was found, the information about the RF channel and the configuration of
the actual payload data is saved in the RFPLLACC register.
Data Sheet
With interfering signal (interferer signal has same data rate as wanted wake-up signal):
WU frame and Payload frame have the same modulation type
e.g. TOTIM_TSI is set to 15ms
*) Chip proceeds with Self Polling Mode
WU-data Interrupt
RunMode SelfPolling
SelfPolling / Sleep
counter activity
counter activity
counter activity
TOTIM_SYNC
TOTIM_EOM
TX interferer
Init TOTIMs
TOTIM_TSI
TX signal
RX_RUN
Cycle Start, that means whenever Run Mode Self Polling is entered or
Frame Start, when a TSI has been successfully identified (and Receive FIFO is not
locked).
TOTIM Behavior in Presence of Interferer
Wake-up
15ms
*)
RI TSI Payload1
106
Functional Description
Chapter 2.5.2 Receive
RI TSI Payload2
V1.0, 2010-02-19
TDA5235