|
YSS944 Datasheet, PDF (1/34 Pages) YAMAHA CORPORATION – ADAMB Advanced Digital Audio Multi channel decode processor | |||
|
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 à 32 bits + 55 bits â 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]
âDolby,â âDolby Pro Logic IIx,â and âAC-3â are trademarks of Dolby Laboratories.
âDTS,â âDTS-ES,â âDTS 96/24,â and âDTS Neo:6â are trademarks of Digital Theater Systems, Inc.
 Applications
⢠AV amplifiers for home theaters
⢠Car audio systems
YSS944/943/940 CATALOG
CATALOG No.: LSI-4SS944A31
2005.6
|
▷ |