AM/FM, DAB/DAB+/DMB-A, DRM multi - STMicroelectronics

STA662 Description
1 Description
The STA662 from STMicroelectronics is a system-on-chip, based on multiple microcontroller
and DSP cores, designed for demodulating and decoding the most common digital radio
standards and the legacy AM/FM. The digital radio standards supported by STA662 are:
DAB (ETSI EN 300 401), DAB+ (ETSI TS 102 563), DMB (ETSI TS 102 428), DRM (ETSI
ES 201 980).
The STA662 implements the three main functions of a Eureka-147 DAB and DRM receiver
specification.
The synchronization: including sampling clock and carrier frequency synchronization;
The channel demodulation and decoding: including OFDM demodulation and convolutional
decoding;
The source decoding: consisting of audio and data decoding. The source decoding can be
moved on an external application processor (a.k.a. SDEC - Source DECoder) so that the
additional resources available on the STA662 IC can be used to implement a second DAB
demodulation chain.
STA662 can demodulate in parallel two DAB streams and legacy AM or FM phase diversity
stream.
AM and FM signal processing and audio functions are implemented on STA662 using
dedicated resources, different from the resources used for the digital radio stream
demodulation. FM phase diversity is implemented, as an alternative dual FM channels
processing is possible, including the possibility to commute seamlessly from FM phase
diversity to FM single tuner + FM background channels.
To pursue the best combination in terms of current consumption, flexibility, system and
device cost, these functions are implemented by a combination of hardware and software.
Functional blocks which are standard and computationally intensive are implemented by
custom logic. Functional blocks where flexibility is a key feature are implemented in
software.
The STA662 combines it all into a single IC consisting of several hardware blocks
implementing custom logic, an ARM946 microcontroller one 24 bit DSP Emerald core and
one 32 bit DSP xP70 core to guarantee the proper level of flexibility, low current
consumption.
Such flexibility enables the STA662 to be ready for future evolution, including the possibility
to implement new radio standards (i.e. HD-Radio), and allows the implementation of
specific and optional features.
Multiple interfaces such as SPI, UART, I 2 C and I 2 S, allow a flexible utilization of the device
and several applications can be addressed, including T-DMB (video), by connecting an
additional application co-processor (i.e. STA2165).
The STA662 implements a additional SDR-SDRAM interface thus allowing to implement
memory-consuming firmware like DAB middleware and DAB/FM seamless switching.
To build a complete DAB/FM/AM receiver, the STA662 needs to be fed by the STA610 RF
Multistandard front-end or from the STA610A RF AM/FM front-end. STA662 supports up to
four RF FE connected in parallel.
The STA662 is assembled in TFBGA289 package.
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