STA662 STMicroelectronics, STA662 Datasheet - Page 8

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

Description
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ARM946 subsystem
A 32-bit ARM946 microcontroller with ITCM and DTCM is embedded into STA662. It
controls the I/O peripherals, the hardware accelerator modules, the DSP-Emerald
subsystem and the DSP STxP70 subsystem.
The ARM946 is used for:
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and in some application can be also used for:
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The STA662 embeds into the ARM946 subsystem both program and data cache to improve
performance during code execution. Also, the amount of Tightly Coupled Memory (TCM)
assigned to the core can be defined by the user at start-up.
The ARM946 uses a trace macro-cell (ETM9) with a trace debug port (JTAG) for in-system
programming and debugging tools. JTAG is also shared with the DSP-Emerald subsystem
and STxp70 subsystem.
An AHB bus matrix is implemented for connecting the 6 AHB masters (ARM, xp70 and 4
DMAs) with all the AHB slaves.
Flexible DMA resources are available for data movement while VIC logic is implemented to
managed interrupt requests.
DSP-STxP70 subsystem
STA662 includes a 32-bit STxP70- with DTCM and L2Pram. MPx and FPx extensions are
connected to the core.
The STxP70 is used for:
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The STxP70 subsystem contains a program cache to improve performance during code
execution. AHB master port is used by the DSP to access the STA662 architecture while an
AHB slave port is used by DMA to access xp70 subsystem memories.
Debugging of the software running on the DSP-STxp70 is possible through the JTAG
interface.
DSP-Emerald subsystem
STA662 includes a 24-bit DSP-Emerald core connected to the hardware-accelerator (HAR)
modules and to the microcontroller via the IPBUS.
The Emerald core is used for:
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System and data flow control
Peripherals initialisation
RDS alternate frequency switching strategy
DAB/DAB+ database management
Seamless linking
DRM channel decoding
DAB channel time and frequency synchronization
Audio decoding
FM processing
AM processing
Audio processing
Doc ID 023407 Rev 1
STA662