ZR38650
PROGRAMMABLE DIGITAL AUDIO PROCESSOR
DATA SHEET
FEATURES
■ Full-Function Digital Audio Processor Hardware
- SRS TruSurround, Music Modes, Bass Management
- 50 MIPS performance with multi-operation instructions
- Large internal RAMs/ROM plus low-cost external memory
- Wide selection of on-chip digital audio peripherals
- Flexible interface for host or no-host operation
■ Standard Software Functions in ROM
■ Flexible Input/Output
- Serial and/or parallel data stream I/O
- Serial SPI, serial Z2C or 8-bit parallel host interface
- 3 serial input data ports and 4 serial data output ports
- Formatted S/PDIF receiver with up to 96 kHz sample rate
- Sample rates: 32 kHz, 44.1 kHz, 48 kHz or 96 kHz
- Formatted S/PDIF AC-3 and MPEG transmitter output
■ Low System Cost
- Dolby Digital AC-3, 5.1 channel and 2 channel decoding
up to 640 Kbits per second
- Dolby Pro Logic encoding and decoding
- MPEG1 and MPEG2 two channel decoding with MPEG2
PES stream parsing, PTS decoding and SCR handling
- Host-less operation with no glue chips
- Separate internal PLLs for DSP core and audio I/O
- No external RAM required for 5.1 Dolby AC-3/MPEG2
- Wait-state generation for low-cost external memory
- 144-pin Plastic Thin Quad Flat Pack (TQFP) package
- 3.3 V supply with 5 V compatible I/O for low power
■ Downloadable SiliconSoftware™ Functions
- Tomorrow’s ever-changing standards plus today’s:
- Aureal A3D, Dolby Virtual Surround, Harman VMAx
- QSound QSurround™, Spatializer N-2-2™, Home THX
DESCRIPTION
The Zoran ZR38650 is a full-function, high performance pro-
grammable digital audio signal processor. It is today capable of
real-time single-chip decoding of Dolby Digital AC-3 and
MPEG2 digital surround algorithms with its standard ROM and
SiliconSoftware functions. It is also today’s best digital audio
platform for meeting tomorrow’s constantly evolving digital audio
algorithm requirements. Using the proven ZR38000 architec-
ture, it is the fourth generation audio processor made by Zoran.
provide eight channels of output, analog input, long-delay mem-
ories, custom operating features and the ability to be upgraded
with downloaded SiliconSoftware product enhancements. Yet all
of this flexibility comes without design complexity. Highly config-
urable standard functions with a simple command structure
minimize software development, while a full set of development
tools are available for the highly-custom product developer.
The ZR38650 is suitable for primarily audio applications such as
Audio/Visual home theater receivers, Digital Audio Broadcast
(DAB), 3-D audio, six-channel speaker systems and Karaoke
processors; primarily video applications like SDTV and HDTV
stereo television receivers, digital cable and satellite TV set-top
boxes; and multimedia applications with both audio and video
like Multimedia PCs and the Digital Video Disk (DVD) players.
Because of its programmable high performance and high level of
integration, the ZR38650 is unusually flexible in meeting a wide
range of system requirements at the lowest possible system
cost. At the low end it can provide standard fixed decoding func-
tions with only a DAC and an optical interface for the S/PDIF
input in addition to the oscillator crystal. At the high end it can
Encoded Data
Input
Decoded Audio
Outputs
Host
Processor
(Optional)
XTAL
SPI or Z2C Serial Interface
Left
DAC
DAC
DAC
Right
Left Surround
Right Surround
Center
S/PDIF
S/PDIF Input
Optical
ZR38650
Interface
Subwoofer
Left Center
Right Center
DAC
(Optional)
General Purpose Control I/O
Figure 1. A Typical Low-Parts-Count ZR38650 System
ZORAN Corporation ■ 3112 Scott Blvd. ■ Santa Clara, CA 95054 ■ +1 (408) 919-4111 ■ FAX +1 (408) 919-4122 ■ www.zoran.com
15 February 1999
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