YSS951
SPR-1
Sound Producer - 1
■ Outline
The YSS951 (SPR-1) is the sound processing device with the two DSP cores and one FM Synthesizer.
This device is best suited for sound processing applications such as TVs, karaoke systems, and digital
audio sets.
■ Features
● Two DSPs (MDSP, SDSP) and one FM synthesizer on one chip.
● Sound Processing DSP (MDSP)
・Operating Frequency
49.152 MHz
・Data Bus Width
32 bits floating point (28 bits mantissa, 4 bits exponent)
・Program RAM (MPRAM)
40 bits × 1K words
・Coefficient RAM (CRAM)
16 bits × 1K words
・Work RAM
WRAM0, WRAM1
32 bits × 1K words
WRAM2 (for delay line) 16 bits × 14K words or 32 bits × 7K words
(298 ms at fs=48 kHz, 16 bits)
・Multiply accumulate unit:
32bits (floating point) × 16 bits (fixed point) + 49 bits → 49 bits
● Sub DSP (SDSP)
・Operating Frequency
49.152 MHz
・Data Bus Width
24 bits (fixed point)
・High-performance asynchronous sampling rate converter
(ASRC: 2 channels, supports input frequency 8 to 192 kHz)
・10-band Parametric Equalizer (2 channels)
● FM Synthesizer
・Yamaha original FM synthesizer functions are mounted
・Internal sequencer
・Up to 4 -voice polyphonic sound generation (four independent timbres)
● Built-in ROM(Preset ROM) 8 bits × 64K words
・Various MDSP signal processing programs and coefficients
・Music, startup sound and reaction sound for FM synthesizer
● Updatable MDSP signal processing programs via the download from a microprocessor
● Audio I/O
・Digital Input:
up to 6 channels
・Digital Output: up to 4 channels
● Supply Voltage: 3.0V to 3.6V (DVDD3), 1.65V to 1.95V (DVDD18)
● Internal PLL
● Package
・Lead-free 48-pin LQFP package [stage exposed] (YSS951-VZ)
・Lead-free 48-pin SQFP package [stage unexposed] (YSS951-SZ)
YSS951 Catalog
CATALOG No.: LSI-4SS951A23
2010.11
