tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 104

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

2.6.1.6
In Self Polling Mode, the chip is able to automatically change the type of modulation
after a wake-up criterion was fulfilled in a received data stream. The type of modulation
used in the different operational modes is selected by the SFR control bit MT.
2.6.1.7
A simple Multi-Channel behavior can be realized when the same application parameters
are programmed in both Configuration sets and only the RF PLL frequency differs.
Channel frequencies are defined in registers x_PLLINTC1, x_PLLFRAC0C1,
x_PLLFRAC1C1, x_PLLFRAC2C1, where x = A or B.
See also
2.6.1.8
The chip enters Run Mode Self Polling after a successful fulfillment of a wake-up
criterion in Self Polling Mode.
When Wake-Up criterion for RSSI or Signal Recognition (see
selected and fulfilled, this leads to a change to Run Mode Self Polling. This will be
interesting especially in case of a transparent data stream being processed externally by
the Application Controller (see
The following steps are performed automatically, depending on register settings:
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•
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•
Depending on interrupt masking, the host microcontroller is alerted when
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See also
Run Mode Self Polling is left, when synchronization is lost and the timeout timer for loss
of synchronization (TOTIM_SYNC) has elapsed, or when one of the other timeout timers
(TOTIM_TSI, TOTIM_EOM) for each configuration (A, B) has elapsed, or when an EOM
occurred and the SFR bit EOM2SPM is activated, or when the operating mode is
switched to SLEEP or Run Mode Slave by the host microcontroller.
Data Sheet
Modulation switching (see
Wait for valid TSI (see
Initialize FIFO (see
Scan for MIDs (see
a data frame has started,
an MID has been found, (if enabled) or
EOM (End of Message) has been detected.
Chapter 2.4.5 Sigma-Delta Fractional-N PLL
Chapter 2.5.4 Interrupt Generation Unit
Automatic Modulation Switching
Multi-Channel in Self Polling Mode
Run Mode Self Polling (RMSP)
Chapter 2.5.2 Receive
Chapter 2.4.8.7 Message ID
Chapter 2.4.8.6 Frame
Chapter 2.6.1.6 Automatic Modulation
Chapter 2.5.1.2 Data
104
FIFO) and write data to FIFO
Synchronization)
Interface).
Scanning)
Block.
Functional Description
Chapter
Switching)
V1.0, 2010-02-19
TDA5235
2.4.8.1) is