tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 113
tda5235
Manufacturer Part Number
tda5235
Description
Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5235.pdf
(259 pages)
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2.6.2.1
Four polling modes are available to fit the polling behavior to the expected wake-up
patterns and to optimize power consumption in Self Polling Mode.
The following 4 Polling Modes are available and can be configured via 2 bits in the
configuration register SPMC:
•
•
•
•
A detected wake-up data sequence or an actual value for RSSI or Signal Recognition (a
combination of Signal Detector and Noise Detector, see
certain adjustable threshold forces the TDA5235 into Run Mode Self Polling.
In all modes the timing resolution is defined by the Reference Timer, which scales the
incoming frequency (f
Polling Mode Reference Timer (SPMRT) register. Changing values of SPMRT helps to
fit the final On-Off timing to the calculated ideal timing.
2.6.2.2
In this mode there is a constant On and a constant Off time. Therefore also the resulting
master period time is constant. The On and Off time are set in the SPMONTA0,
SPMONTA1, SPMONTB0, SPMONTB1, SPMOFFT0 and SPMOFFT1 registers. The
On time configuration is done separately for Configuration A and B.
When Single-Configuration is selected then only Configuration A is used. Multi-
Configuration Mode allows reception of up to 2 different transmit sources. The diagram
below shows possible scenarios.
All receive modes described in
Data Sheet
Constant On-Off (COO)
Fast Fall Back to SLEEP (FFB)
Mixed Mode (MM)
Permanent Wake-Up Search (PWUS)
Self Polling Modes
Constant On-Off Time (COO)
sys
/64) corresponding to the value, which is defined in the Self
Chapter 2.5.1.2 Data Interface
113
Chapter
Functional Description
can be used.
2.4.8.1) exceeding a
V1.0, 2010-02-19
TDA5235
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