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YAMAHA - (YSS940 - YSS944) ADAMB Advanced Digital Audio Multi channel decode processor

Numéro de référence YSS944
Description (YSS940 - YSS944) ADAMB Advanced Digital Audio Multi channel decode processor
Fabricant YAMAHA 
Logo YAMAHA 





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YSS944 fiche technique
YSS944/943/940
ADAMB
Advanced Digital Audio Multi channel decode processor
„ Outline
The YSS944 (ADAMB-f)/YSS943 (ADAMB-b)/YSS940 (ADAMB-nd) is an audio decoding digital signal
processor that integrates onto a single chip the various digital signal processing functions required for AV
amplifiers, etc. It includes an advanced 32-bit floating-point DSP and is able to decode a variety of audio
formats.
[Note]
The contents described in this manual are implemented by downloading boot firmware.
For detailed information about the boot firmware, please contact YAMAHA.
The YSS943 cannot execute DTS-ES and DTS Neo:6 decoding.
The YSS940 cannot execute any decoding related to DTS (DTS, DTS-ES, DTS 96/24, and DTS Neo:6).
„ Features
Supports various types of decoding up to 7.1 channels (5.1/6.1/7.1 channels selectable).
5.1-channel decoding of Dolby Digital (AC-3), DTS, AAC.
6.1-channel decoding of Dolby Digital EX, DTS-ES.
DTS 96/24 decoding and audio interface clock division/switching functions.
Dolby Pro Logic IIx and DTS Neo:6 decoding
Tone control and bass management functions
Function modification/expansion by downloading firmware to on-chip memory
Lip-sync function that enables synchronization of voice and video with variable voice delay
Supports sampling frequencies up to 192 kHz during PCM playback.
1/2 down sampling function when two PCM channels are played back
Dolby Digital/DTS/AAC decode information output function (can be read by microprocessor)
High-speed/high-accuracy operation by 32-bit floating-point DSP
Operating frequency: 180 MHz (178.176 MHz)
Data bus width: 32 bits (24-bit mantissa and 8-bit exponent)
Multiplier/adder: 32 bits × 32 bits + 55 bits 55 bits (47-bit mantissa and 8-bit exponent)
No external memory needed (external memory is used when delay is increased.)
Eight general I/O ports
On-chip PLL for generation of high-speed internal operating clock
Supply voltage: 1.2 V (core block) and 3.3 V (pin block)
Low power consumption: about 210 mW (standard value during Dolby Digital decoding)
Si-gate CMOS process
Lead-free plating LQFP144 package (YSS944-VZ, YSS943-VZ, and YSS940-VZ)
[Note]
“Dolby,” ”Dolby Pro Logic IIx,” and “AC-3” are trademarks of Dolby Laboratories.
“DTS,” “DTS-ES,” “DTS 96/24,” and “DTS Neo:6” are trademarks of Digital Theater Systems, Inc.
„ Applications
AV amplifiers for home theaters
Car audio systems
www.DataSheet4U.com
YSS944/943/940 CATALOG
CATALOG No.: LSI-4SS944A31
2005.6

PagesPages 30
Télécharger [ YSS944 ]


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