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ZR38650 Schematic ( PDF Datasheet ) - Zoran
| Teilenummer | ZR38650 |
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| Beschreibung | Programmable Digital Audio Processor | |
| Hersteller | Zoran | |
| Logo |  |
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Gesamt 30 Seiten 
DATA SHEET
ZR38650
PROGRAMMABLE DIGITAL AUDIO PROCESSOR
FEATURES
s Full-Function Digital Audio Processor Hardware
- 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
s Standard Software Functions in ROM
- 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
s 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
- SRS TruSurround, Music Modes, Bass Management
s 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
s Low System Cost
- 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
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.
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
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.
Encoded Data
Input
S/PDIF Input
S/PDIF
Optical
Interface
XTAL
Host
Processor
(Optional)
SPI or Z2C Serial Interface
ZR38650
Decoded Audio
Outputs
DAC
DAC
DAC
DAC
(Optional)
Left
Right
Left Surround
Right Surround
Center
Subwoofer
Left Center
Right Center
General Purpose Control I/O
Figure 1. A Typical Low-Parts-Count ZR38650 System
ZORAN Corporation s 3112 Scott Blvd. s Santa Clara, CA 95054 s +1 (408) 919-4111 s FAX +1 (408) 919-4122 s www.zoran.com
15 February 1999
 
ZR38650
Software - Functions
Primary Decoding and Test Functions
AC-3
The major modes of operation of the Dolby Digital AC-3 decoder
function are summarized in Table 2. Choices are for input and
output ports and their formats including operation with audio/vid-
eo synchronization (AVS), constant or request driven PES
packetized inputs and the linear PCM of DVD.
AC-3 input decoding rates are up to 640 kbits per second. Full
selection can be made for speaker configuration, dynamic range
compression, downmixing, delays, filtering and error conceal-
ment strategy. The Karaoke downmixing is also supported
including with downloaded Karaoke coefficients.
PCM + Pro Logic
With two-channel PCM inputs, the choice of functions is four-
channel Pro Logic decoding or two-channel stereo mixing.
Selection can be made for speaker configuration, downmixing,
delays and surround filtering.
MPEG
The MPEG1 decoder function accepts either MPEG1 or MPEG2
input streams and produces either Pro Logic or two-channel
stereo outputs in DAC form. Selection can be made for speaker
configuration, dynamic range compression, downmixing, delays
and surround filtering.
Pink Noise
This is a six-channel pink (equal energy per constant proportion-
al bandwidth) pseudo-random noise generator test function. It is
for user testing of speaker balance in a listening space. The six
individual speakers can be enabled in any combination at a
single adjustable level, with or without a band-limiting filter.
SiliconSoftware™ Functions
3-D Audio
There are six third-party providers of 3-D audio using the
ZR38650. This function gives the effect of a three-dimensional
sound field with only two speakers. These certified functions are
Aureal A3D, Dolby Virtual Surround, Harman VMAx, QSound
QSurround™, Spatializer N-2-2™ and SRS TruSurround. They
work with either two- or six-channel inputs and the AC-3, MPEG
and Pro Logic decoders as shown in Table 3.
Bass Management
Depending upon the speakers used in a listening area, it can be
desirable to alter the distribution of the bass frequencies
between speakers. A choice of speaker configurations is
provided and of low-pass cut-off frequencies for 80, 100 or 120
Hertz in the simplest form. The full function allows the low-pass
and high-pass filter coefficients to be downloaded along with
individual speaker sound levels.
Bass management works with either two- or six-channel inputs
and the AC-3, MPEG and Pro Logic decoders. It does not work
with 3-D audio although some 3-D audio functions include
certain bass management features.
DVD - Linear PCM
In addition to the audio/video synchronization (AVS) and request
driven PES packetized input features of the standard decode
functions, this DVD function has 3-D audio capability and bass
management. It works with two-, six- or eight-channel PCM
inputs and the AC-3, MPEG and Pro Logic decoders.
Table 2: Primary Decoding and Test Function Options Summary
Primary
Decoding Or
Test Function
AC3
Data
Stream
6-Channel
AC-3
2-Channel
AC-3
PCM + Pro Logic 2-Channel
PCM
MPEG
MPEG1
MPEG2
PNG
-
Serial Port
A, S/PDIF,
Parallel
SA, S/P, P
Input
AVS
Yes
SA, S/P, P Yes
SA, S/P, P No
SA, S/P, P Yes
SA, S/P, P Yes
--
Output
MPEG2
DVD
PES
PES
Packetized Packetized
Function
Serial DAC
Ports
Yes Yes 6-Channel AC-3
B,C,D
2-Channel Pro Logic
encoded
B
Yes
Yes 4-Channel Pro Logic
B,C,D
2-Channel AC-3
B
No
No 4-Channel Pro Logic
B,C,D
2-Channel PCM Mixed
B
Yes
Yes 4-Channel Pro Logic
B,C,D
2-Channel MPEG1
B
Yes
Yes 4-Channel Pro Logic
B,C,D
2-Channel MPEG1
B
- - 6-Channel Pink Noise B,C,D
S/PDIF Port G
Input Stream
Input Stream
Input Stream
-
6
6 Page 
ZR38650
STANDARD FUNCTIONS DESCRIPTION
The ZR38650 standard functions are selected and controlled by
the commands and responses shown in Tables 7 and 8. These
are the commands, parameters and responses sent and
received by a microprocessor over the serial host interface or
the parallel host interface when a parallel host is used. The
Applications Program Interfaces (APIs) for the AC-3, Pro Logic,
Pink Noise, etc. functions are similar. These APIs are used by a
developers program executing on the core processor.
Transfers between a host and the ZR38650 with the SPI are full-
duplex with the host being the master. For every command sent
a word is received back from the ZR38650. Transfers with the
parallel host interface or the serial Z2C interface are half-duplex
with the host master. Then the host must initiate the read for the
response after each command is sent. The commands are sent
only from the host and are in the general form shown.
76543210
Operation Code
Parameter Word 1
Parameter Word 2
Parameter Word N
There are two classes of commands: those that Write to the
decoder and those that Read back from the decoder. The Write
commands may have parameter words in addition to the basic
operation code. The Write commands are of three types as
shown in Table 7: those that choose primary decoding and test
functions (e.g., AC3), those that govern operation (e.g., STOP or
PLAY) and those that set-up operation (e.g., CFG).
Table 7: Standard Function Command Summary (Host to ZR38650 Transfers)
Class
Name
Write Command
Primary
Decoding
And Test
Functions
AC3
PCMPROL
MPEG
PNG
USER
Operation
Functions
PLAY
MUTE
UNMUTE
STOP
STOPF
STAT
SPDIFSTAT
GETPTC
NOP
Set-Up
Functions
PLLTAB
PLLCFG
CFG
SETSTC
VER
BOOT
SPDIFCS
PARAM
INTRP
SETIO
POKE
PEEK
Read Command
READ
Operation
code (Hex)
85
86
87
83
88
8A
8B
89
8C
8D
8E
8F
9A
80
98
99
82
97
81
90
95
96
91
92
93
94
00
Number of
parameter words
Description
Commands to ZR38650 to perform a specific function or operation
8 Select AC-3 and Pro Logic decoder function, either six- or two-channel output
8 Select PCM or Pro Logic decoder functions with PCM input and mixer function
8 Select MPEG or MPEG + Pro Logic decoder function
8 Select pink noise generator function
8 Select user defined function
0 Resume selected function operation and unmute audio output
0 Mute audio output without stopping the selected operation
0 Restore muted audio output while continuing the selected operation
0 Stop operation, retain data in input buffer and mute audio output
0 Stop operation, flush the data in the input buffer and mute audio output
0 Return decoder status information using the READ command
0 Return the S/PDIF input channel status
0 Return the PTC and STC values
0 Not a command, does not affect operation. Will return a Progress response.
6 Set the PLL programmable registers
1 Define the PLL configuration
8 Configure the ZR38650 I/O to the specific system hardware
7 Set the system time clock and video delay
0 Return 32-bit ROM version number using the READ command
N Load and execute the N parameter words of bootstrap program
4 Write the S/PDIF output channel status
N Define parameters for special functions
4 Interpret: load and execute four parameter words as a ZR38001 instruction
4 Set, test and return general purpose single-bit I/O registers
7+4N
Load N 32-bit words to the core processor RAM at the given start address
7 Read N 32-bit words from core processor RAM at the given start address
Commands to ZR38650 to return Reply words to the host
0 Command to ZR38650 to return a Reply word after specific commands
12
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