DDX-4100
DDX Multichannel
FEATURES
Digital Audio Processor
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SOURCE-TO-SPEAKER INTEGRATED
GENERAL DESCRIPTION
DIGITAL AUDIO SOLUTION w/DDX-2060
Power IC’s
The DDX-4100 Digital Audio Processor is a single
chip device for implementing complete digital
solutions for audio amplification. In conjunction with
multiple DDX-2060 Power IC’s, the solution provides
a full digital, multi-channel, high quality, power
processing chain without the need of Digital-to-Analog
converters between the DSP and power amplifier.
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DIGITAL PREAMP FUNCTIONS:
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Digital Volume Control
Bass and Treble
Parametric EQ on each Channel
Bass Management for LFE Channel
Soft Mute
Automatic mute for Zero Inputs
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4+1 CHANNELS DDX PROCESSING
STEREO S/PDIF INPUT INTERFACE
The device supports two input configurations, AC’97
input mode or IIS/SPDIF input mode, with the
selection made via a dedicated pin (AC97_MODE
pin).
4 CHANNEL PROGRAMMABLE SERIAL
INPUT INTERFACE
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6 CHANNEL PROGRAMMABLE SERIAL
OUTPUT INTERFACE
The AC’97 input mode can be configured to work in
either a ‘Fully Compliant’ mode or a ‘Proprietary’
mode. The selection of this compliance mode is made
in a Vendor Reserved register. The ‘Fully Compliant’
mode conforms to rev 2.1 of AC’97 specification. The
‘Proprietary’ mode enables additional features not
found in the ‘Fully Compliant’ mode. The link supports
up to 6 input channels with discrete sampling
frequencies of 44.1, 48, 88.2, or 96 kHz.
Intel AC’97 LINK (rev.2.1) INPUT INTERFACE
for AUDIO AND CONTROL
AUTOMATIC INPUT SAMPLING
FREQUENCY DETECTION AND SAMPLE
RATE CONVERTER
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I2C CONTROL BUS
LOW POWER 3.3V CMOS TECHNOLOGY
EXTERNAL INPUT CLOCK OR BUILT-IN
XTAL OSCILLATOR
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DIGITAL GAIN CONTROL; UP TO 24dB @
0.75dB/STEP
DDX-4100 BLOCK DIAGRAM
SA
11
SCL
10
SDA
9
LEFT
LEFT
RIGHT
RIGHT
SLEFT
SLEFT
A
B
A
B
A
B
30
29
28
27
34
33
3
4
LRCK1/SYNC
BICKI/BIT CL
I2S
SDI 1/AC97 OUT
SDI 2/AC97 IN
1
2
ROM
DDX
24
23
22
SRIGHT
SRIGHT
A
B
LFE
LFE
A
B
RXP
RXN
18
19
21
SRC
DSP
LRCK0
BICKO
36
40
I2S
37
38
39
SDO
SDO
SDO
1
2
3
RAM
AC’97
EAPD
35
PowerDown
RESET
7
14
15
43
44
XTI
XTO
CKOUT
PWDN
129 Morgan Drive, Norwood MA 02062
1
voice: (888) 3APOGEE fax: (781) 440-9528
www.apogeeddx.com
Copyright Apogee Technology, Inc 2000, 2001
(All Rights Reserved)
December 2001
DOC # 04010001-05