STA662 STMicroelectronics, STA662 Datasheet - Page 4

• Manufacturer Part Number: STA662
• Description: Audio Transmitters, Receivers, Transceivers AM/FM, DAB/DAB+/DMB-A, DRM Multi-Standard Digital Radio Receiver
• Manufacturer: STMicroelectronics

Description
1.1
Figure 1.
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DAB signal processing
The STA662 performs the processing of the DAB signal. It receives a complex digital signal
from an DAB RF tuner either from a multi-standard RF tuner. The native sample rate is
2048 kHz. Sample rate conversion hardware is provided on-chip. This feature allows the
STA662 to operate with various DAB front-ends.
The STA662 is then responsible for detection, acquisition, and demodulation of the DAB
signal. Such functions are primarily implemented by dedicated hardware accelerators. The
demodulated signal is then passed to the ARM946 processor, for audio decoding and
handling of data services. A digital decompressed audio at different audio rates is output via
the Digital Audio Interface.
As an alternative the compressed audio stream can be transferred to an application
processor for the audio demodulation.
Figure 1
demodulation and decoding. In some use cases source and service decoding can be
performed on the external application processor.
DAB demodulating and decoding functional data flow diagram
presents a functional diagram describing the data flow inside STA662 for DAB
Doc ID 023407 Rev 1
STA662