SP000202847 Infineon Technologies, SP000202847 Datasheet - Page 84
SP000202847
Manufacturer Part Number
SP000202847
Description
Manufacturer
Infineon Technologies
Datasheet
1.SP000202847.pdf
(186 pages)
Specifications of SP000202847
Operating Temperature (min)
-40C
Operating Temperature (max)
105C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Lead Free Status / Rohs Status
Compliant
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The higher the output of ASKNP, the better the reliability of the related data bit. The
signal detector uses this value to distinguish between acceptable data and unacceptable
data (e.g. noise).
Figure 41
The polarity of the Manchester code can be inverted by setting the SFR control bit
DATINV.
Signal and Noise Detector
The Signal and the Noise Detector compare the outputs of ASKNP and FSKNP (see
FSK Demodulator) with configurable thresholds.
The Signal Detection Mode must be configured based on whether ASK or FSK
modulation is used:
•
•
•
•
Data Sheet
Signal power detection (=Squelch) only (related registers SIGDET0, SIGDET1 and
ASKNP). This mode is generally used for ASK and recommended for FSK.
Noise power detection only (related registers NDTHRES and FSKNP).
Signal and noise power detection simultaneously.
Signal and noise power detection simultaneously, but the FSK noise detect signal is
valid only if the SIGDETLO threshold is exceeded. This is the recommended FSK
mode, if minimum FSK Deviation is not sufficient to use signal power detection only.
limiter
from
MUX
from
f
f
sys
sys
Matched Filter, Signal/Noise Detection and Slicer units
matched
power
meter
noise
FSK
filter
T
nom
/ 16
signal power meter
T
nom
/ 16
signal power
threashold
detector
register
shift
+
enable
delayed
data
80
data
data
threshold
T
nom
/ 16
data slicer
(+1 0 -1)
T
nom
Functional Description
clock recovery
/ 16
Version 4.0, 2007-06-01
slicer
chip data
decoder
recovery
to clock
recovered
framer
clock
TDA523x
to
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