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STA680 Scheda tecnica(PDF) 9 Page - STMicroelectronics

Il numero della parte STA680
Spiegazioni elettronici  HD Radio base-band receiver
PDF  43 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA680 Scheda tecnica(HTML) 9 Page - STMicroelectronics

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STA680
System overview
9/43
In a dual channels implementation STA680 can simultaneously demodulate audio and data
associated to different radio channels. This means that in the example above it would be still
possible to receive traffic information broadcasted on FM2 (102.5 MHz) while listening FM1
audio program broadcasted on 92.5 MHz
Figure 4.
Dual channel application
2.3
Additional processing
The HD Radio stream demodulation and decoding take up only part of the computation
power and memories resources available on STA680. This makes it possible to use the
spare resources to implement additional features.
Depending on memory and computation power required by the additional features, it is
possible to run them in parallel with the HD Radio stream decoding or in alternative, having
all the hardware resources available for the additional features.
2.3.1
AM/FM processing
It is possible to implement legacy AM/FM processing in parallel with the HD Radio stream
demodulation and decoding. Such solution is particularly suitable and appealing when the
STA680 processor works jointly with an AM/FM RF front-end not incorporating the AM/FM
demodulation.
2.3.2
Audio codec
STA680 can be used as a media processor to decode MP3/WMA audio stream. Thanks to
the availability of the MMC and SD interface it is possible to reproduce an MP3 stream
stored into any MMC or SD cards
FM1
Audio
FM1
News
FM 1
FM1
Audio
FM1
News
FM 1
FM2
Audio
FM2
Traffic
FM 2
92.5
102.5
MHz
FM1 News
FM1
Audio
FM1 News
FM1
Audio
OR
Audio and Data can belong to different channels
FM2 Traffic
FM1
Audio
OR
FM1 News
FM2
Audio
OR
FM2 Traffic
FM1
Audio



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