SAA7715 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

SAA7715

Digital Signal Processor

Philips Electronics 

Philips Semiconductors

Digital Signal Processor

Preliminary specification

SAA7715H

1 FEATURES

1.1 Hardware

• 24-bit Philips 70 MIPS DSP core (24-bit data path and

12/24-bit coefficient path)

• 1.5 kbyte of downloadable DSP program memory

(PRAM)

• 2 kbyte of DSP program memory (PROM)

• 2.5 kbyte of re-programmable DSP data memory

(XRAM)

• 512 byte of re-programmable DSP coefficient memory

(YRAM)

• Four stereo digital serial inputs (8 channels) with

common BCK and WS. To these inputs the I2S-bus

format or LSB-justified formats can be applied

• One stereo bitstream DAC (2 channels) with 64 fold

oversampling and noise shaping

• Selectable clock output (pin SYSCLK) for external slave

devices (512fs to 128fs)

• Four stereo digital serial outputs (8 channels) with

selectable I2S-bus or LSB-justified format

• Two SPDIF inputs combined with digital serial input

• On-board WS_PLL generates clock for on-board DAC

and output pin SYSCLK

• I2C-bus controlled (including fast mode)

• Programmable Phase-Locked Loop (PLL) derives the

clock for the DSP from the CLK_IN input

• −40 to +85 °C operating temperature range

• supply voltage only 3.3 V

• All digital inputs are tolerant for 5 V input levels

• Power-down mode for low current consumption in

standby mode

• Optimized pinning for applications with other Philips

DACs (such as UDA1334, UDA1355 and UDA1328).

1.2 Possible firmware

• Dolby®(1) Pro Logic decoding

• Smoothed volume control (without zipper noise)

• Automatic Volume Levelling (AVL)

• Dynamic bass enhancement

• Ultra bass

(1) Dolby — Available only to licensees of Dolby Laboratories

Licensing Corporation, San Francisco, CA94111, USA, from

whom licensing and application information must be obtained.

Dolby is a registered trade-mark of Dolby Laboratories

Licensing Corporation.

• Incredible surround

• Incredible mono (Imono)

• DPL virtualiser

• Dolby digital virtualiser (DVD post-processing)

• Dynamic compressor

• Spectral enhancer

• Equalizer with peaking/shelving filters

• DC filters

• Bass/treble control

• Dynamic loudness

• Tone/noise generator

• Graphical spectrum analyser

• Configurable Delay Unit (DLU)

• Sound steering/elevation for CAR applications

• Sample Rate Conversion (SRC).

2 APPLICATIONS

• As co-processor for a car radio DSP in a car radio

application for additional acoustic enhancements

(sound steering/sound elevation/signal processing)

• Multichannel audio: in DVD and Home theatre

applications as post-processing device like signal

virtualisation (virtual 3D surround) and acoustic

enhancement, tone control, volume control and

equalizers

• Multichannel decoding: Dolby Pro Logic and virtual

3D surround

• PC/USB audio applications: stereo widening (Incredible

surround), sound steering, sound positioning and

speaker equalization.

2001 May 07

3

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