STA264 Datasheet, PDF (1/6 Pages) STMicroelectronics – Sirius overlay decoder

STA264
Sirius overlay decoder
Data Brief
Features
■ De-multiplexes the incoming overlay data
stream from the G3 Baseband processor
■ Maximal Ratio Combines the signals from the
three streams of data (TDM1, TDM2, COFDM)
■ Performs diversity combining two demodulated
soft symbol streams
■ Utilizes internal TDM demodulators for
diversity combining cost sensitive applications
■ Performs error correction on the overlay data
■ Closes the processing loop to control the
Diversity Combiner or accepts second L2 input
for internal combining
■ Presents data to external application
processors
■ Channels I2S data from Baseband to
Application Processors
– Data can be uncompressed audio
– Data can be "Data"
■ Receives SSPv2 Commands
– UART
– Parse data for Overlay and Legacy tune
commands
– Navigation
TFBGA249
■ Controls the Baseband Processor and DSP via
UART ports
– Required so theApplication Processor can
interface to a single client
■ Provides commands to the Application
Processor
■ Memory Interfaces
– SDR SDRAM to support the four second
buffer and de-interleaving
– FLASH for the storage of Firmware
Description
The STA264 ASIC is a fully integrated processor
for Sirius Satellite Digital Radio Service (SDARS)
that allows for decoding of Layer 2 hierarchical
data.
Table 1.
Device summary
Order code
STA264
STA264TR
Package
TFBGA249
TFBGA249
Packing
Tray
Tape and reel
July 2007
Rev 2
For further information contact your local STMicroelectronics sales office.
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www.st.com
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