YSS950

DAP1

Digital Audio Processor

YSS950 CATALOG

CATALOG No.: LSI-4SS950A22

2006.10

■ Outline

The YSS950 (DAP1) is a DSP (Digital Signal Processor) for sound field processing, which features a

high-speed/ high-precision 32-bit floating point DSP.

■ Features

32-bit floating point DSP achieves high-speed/high-precision operations

• Operation frequency: Approximately 166 MHz

• Data bus width: 32 bits (24-bit mantissa, 8-bit exponent)

• Multiplier/adder: 32 bits × 32 bits + 55 bits → 55 bits (47-bit mantissa, 8-bit exponent)

48 KB (12 Kword) preset command code firmware area

24 KB (6 Kword) download command code firmware area (maximum)

104 KB (26 Kword) data RAM area (maximum)

High-speed command code/coefficient data firmware download (burst transfer)

Download coefficients data firmware without any interruption of sound (runtime transfer)

Firmware’s placement order can be changed

Firmware’s number of execution channels can be changed (up to 16 channels)

Multiple firmware calls are enabled

Audio I/O

• 32 bits × 16 channels, TDM

• Fixed point decimal format and floating point decimal format (IEEE Standard 754, two’s complement)

• Sampling frequency range is 32 to 192 kHz

• Audio clock division/switch

• Input/output muting

• Input/output channel switching

External memory not required

General I/O ports (4)

On-chip PLL

Power supply voltage:

1.2 V (core), 3.3 V (pin)

Low power consumption: Approximately 130mW (typical value)

Si-gate CMOS process

Lead-free 64-pin SQFP package (YSS950-SZ)

■ Applications

Home theater systems

Car audio