DPL 3520A,
DPL 3519A,
DPL 3518A
Dolby Pro Logic
Processor Family
Edition July 31, 1997
6251-423-1PD
PRELIMINARY DATA SHEET
MICRONAS
MICRONAS
DPL 35xxA
PRELIMINARY DATA SHEET
2
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Contents
Page
Section
Title
4
1.
Introduction
6
2.
Functional Description
6
2.1.
Features of the Analog Input Section
6
2.2.
Features of the DSP-Section
7
2.3.
Features of the Analog Output Section
7
2.4.
SCART Switches
8
3.
Specifications
8
3.1.
Outline Dimensions
9
3.2.
Pin Connections and Short Descriptions
12
3.3.
Pin Configurations
15
3.4.
Pin Circuits
17
3.5.
Electrical Characteristics
17
3.5.1.
Absolute Maximum Ratings
18
3.5.2.
Recommended Operating Conditions
21
3.5.3.
Characteristics
26
3.5.4.
Measurements according to Dolby specifications, typical values
27
4.
I
2
C-Bus Interface
28
4.1.
Protocol Description
28
4.2.
Proposal for DPL I
2
C-Telegrams
28
4.2.1.
Symbols
28
4.2.2.
Write Telegrams
28
4.2.3.
Read Telegrams
28
4.2.4.
Examples
28
4.3.
Start-Up Sequence
29
5.
Audio PLL and Crystal Specifications
29
5.1.
Operation with Crystal
29
5.2.
Operation without Crystal
29
6.
I
2
S-Bus Interface
30
6.1.
I
2
S Bus Timing Diagram
31
7.
Power-up Sequence
32
8.
Programming the Mode Register
33
9.
Programming the DSP Part
33
9.1.
Summary of the DSP Control Registers
35
9.1.1.
Volume Channel 1 and Channel 2
35
9.1.2.
Balance Channel 1 and Channel 2
36
9.1.3.
Bass Channel 1 and Channel 2
37
9.1.4.
Treble Channel 1 and Channel 2
37
9.1.5.
Loudness Channel 1 and Channel 2
38
9.1.6.
Spatial Effects Channel 1
39
9.1.7.
Volume SCART Channel
39
9.1.8.
Channel Source Modes
40
9.1.9.
Channel Matrix Modes
40
9.1.10.
SCART Prescale
DPL 35xxA
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Contents, continued
Page
Section
Title
40
9.1.11.
I
2
S1 and I
2
S2 Prescale
41
9.1.12.
ACB Register, Definition of the SCART-Switches and DIG_CTR_OUT Pins
41
9.1.13.
Beeper
41
9.1.14.
Mode Tone Control
42
9.1.15.
Equalizer Channel 1
42
9.1.16.
Surround Decoder Modes
43
9.1.17.
Surround Reproduction Modes
43
9.1.18.
Surround Source Modes
43
9.1.19.
Surround Source Matrix Modes
44
9.1.20.
Surround Delay
44
9.1.21.
Surround Manual Input Balance
44
9.1.22.
Surround Input Balance Mode
44
9.1.23.
Surround Spatial Effect
44
9.1.24.
Panorama Sound Effect
44
9.1.25.
Surround Reverberation
45
9.2.
Summary of Readable Registers
45
9.2.1.
Quasi Peak Detector
45
9.2.2.
Digital Input Level Register
46
10.
Further Explanations and Application Hints
46
10.1.
Overview of the Surround Decoder and Reproduction Modes
47
10.2.
Useful Combinations of the Surround Decoder and Reproduction Modes
47
10.2.1.
Useful Combinations with the ADAPTIVE Surround Decoder Mode
47
10.2.2.
Useful Combinations with the PASSIVE Surround Decoder Mode
47
10.2.3.
Useful Combinations with the EFFECT Surround Decoder Mode
48
10.3.
Further Notes
48
10.4.
Input and Output Levels for Dolby Pro Logic Operation
48
10.5.
Dolby Qualification
49
10.6.
Phase Relationship of Outputs
50
10.7.
Minimum Control Transmissions for DPL 3520A
51
11.
Application Principle of the DPL 3520A
52
12.
Application Circuit Diagram of the DPL 3520A
53
13.
Dolby Pro Logic Processor Family
53
13.1.
DPL 3518A: Basic Dolby Pro Logic Coprocessor for the MSP Family
54
13.2.
DPL 3519A: Advanced Dolby Pro Logic Coprocessor for the MSP Family
56
14.
IC Failure Report
56
15.
Data Sheet History
DPL 3520A Dolby*
)
Pro Logic Processor
Note: This document contains information on a new product.
Specifications and information herein are subject to change without notice.
*
)
"Dolby", the double-D symbol and "Pro Logic" are trademarks of Dolby Laboratories Licensing Corporation.
DPL 35xxA
PRELIMINARY DATA SHEET
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Dolby Pro Logic Processor Family
1. Introduction
The DPL 35xxA processor family is designed to decode
Dolby encoded surround sound. The ICs integrate the
complete Dolby Surround Pro Logic decoding on chip
without any necessary external circuitry. This data sheet
describes the features and specifications of all members
of the IC family.
The DPL 3518A is designed as a coprocessor to one of
the TV sound processing ICs of the MSP 34xx family. It
only has digital interfaces. No analog input and output in-
terfaces are supported.
The DPL 3519A is also designed as a coprocessor to the
MSP family but has analog output channels in addition
to the features of the DPL 3518A. Together with the MSP,
a TV set with up to six outputs (L, R, C, SUB, S
L
, S
R
) can
be developed together with headphones and several
line outputs.
The DPL 3520A is designed as a stand-alone Dolby Sur-
round Pro Logic decoder. An on-chip A/D converter digi-
tizes analog inputs. The DPL 3520A can also be used as
a coprocessor to the MSP 34xx single-chip Multistan-
dard Sound Processor family. This gives another A/D in-
put pair to the system.
The ICs of the DPL family are pin-compatible to the MSP
ICs. This speeds up PCB development for customers
using MSPs.
The software interface is largely the same as for the
MSP 3400C. Volume, tone controls, matrixes and
switches use the same registers and values. Thus, the
standard MSP 3400C controlling software can be used
to control the DPL 3520A. Little overhead is needed to
control the Dolby Pro Logic part of the IC.
DPL 35xxA
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DPL 3518A Integrated Functions:
Full Dolby Surround Pro Logic Adaptive Matrix
Pseudo-surround mode for signals not encoded in Dolby Surround
PANORAMA sound mode (3-D Surround sound via 2 loudspeakers)
Noise sequencer
Automatic input balance control
7 kHz low-pass filter
100 Hz low-pass filter for subwoofer
Modified Dolby B-type NR decoder
30 ms surround delay according to table created by Dolby Laboratories (1 ms steps)
2 I
2
S input channels (e.g. MSP and DRPA)
2 I
2
S output channels, freely programmable with sound channels L/R (resp. L
)
C/R
)
C), C/S, Sub or I
2
S input
Mode control: normal/phantom/wide/three channel/center off/panorama sound/stereo bypass
Surround matrix mode control: adaptive/passive/effect
Additional surround basewidth effect
Reverberation of surround signals
2 digital input/output pins
1 digital input pin
DPL 3519A Integrated Functions (in Addition to all DPL 3518A Functions):
Master volume control in dB units
Level Trim for L, C, R, S in dB units,
$
12 dB
Identical treble/bass/loudness function for L, C, R, S
5-band equalizer for C channel
Separate volume control for two surround outputs
Additional line output for HIFI receiver connection (SCART output). Volume for this output is in dB units.
3 pairs of D/A converters
Scart switches
DPL 3520A Integrated Functions (in Addition to all DPL 3518A and DPL 3519A Functions)
1 pair of A/D converters
Note: the 5-band equalizer for C channel can only be used in coprocessor mode. No parallel AD input possible.
DPL 3520/19/18A Applications:
Dolby Pro Logic Surround System
in television sets
in satellite receivers
in video recorders
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