Analog Devices ADAV4601 User Manual

ADAV4601 System Design Document Confidential Information
Rev.1 August 2009 Analog Devices Page 40
SECTION 4 – THE DEFAULT FLOW
0x0100 0x0102 0x0105 0x0106 0x0107 0x0108
0x010A
0x010A
0x0109
0x012C
0x012D
0x012E
0x010B
0x010C
0x010D
0x010E
0x010F
0x0110
0x0111
0x0112
0x0113
0x0114
0x0115
0x0116
0x0117
0x0121
0x0121
0x0100 0x0102 0x0118 0x0120
0x011A
0x011B
0x011C
0x011D
0x011E
0x011F
0x0121
0x0101 0x0103 0x0121
0x0101 0x0103 0x0121
0x0101 0x0121
0x0123
0x0103
0x0124
0x0122
LIP SYNC
TRIM
AUXOUTL1
AUXOUTR1
HPOUTL1/AUXOUTL4
HPOUTR1/AUXOUTR4
HP MUX
AUXOUT1
MUX
SPDIF MUXSDO0 MUX
TRIM
TRIM
7 BAND EQMUTEMUTEMUTE
LOUDNESS
BALANCE
VOLUME
MUTE
BEEPER
MAIN MUX
TRIM
AVC
7 BAND EQ
LOUDNESS
CROSSOVER
CROSSOVER
TRIM
8 BAND EQ
BALANCE
VOLUME CONTROL
LIMITER
+
MUTE MUTE
PWM1 (LHIGH)/
AUXOUT3L
PWM2 (RHIGH)/
AUXOUT3R
SPDIF OUTR (SDOR1)
SPDIF OUTL (SDOL1)
PWM3 (LLOW)
PWM4 (RLOW)
+
SDOL0
SDOR0
AUXINL1
AUXINR1
TRIM
(L + R)/2
LPF
SUB
CHANNEL TO
INPUT
MUXES
SUB CHANNEL
SDIN0
SDIN1
SPATIALIZER
CROSSOVER
TRIM
DYNAMIC
BASS
BALANCE
LIMITER
0x0126
SDIN3/SRC 2
CHANNEL C
SRC1
SRC2
CHANNEL A
SRC DELAY
0x0127
0x0127
0x0127
0x0127
SRC1 MUTESRC2 MUTE
SRC1
DE-EMPHASIS
SRC2
DE-EMPHASIS
SDIN2/SRC 2
CHANNEL B
07070-108
Figure 34: Default Audio Flow for the ADAV4601
DEFAULT FLOW STRUCTURE
The Default Flow consists of five parallel channels all of which are muted by default;
Main
Headphone
AUXOUT1
S/PDIF
SDO0
Main Channel
The core of the Default Flow is the Main Channel which provides the main audio processing; Volume, Lip Sync, AVC,
Spatailizer, EQ, Loudness, Dynamic Bass.
The Main Channel contains a crossover which splits the signal into a tweeter channel and a woofer channel. PWM1,
PWM2 output the tweeter. PWM3 and PWM4 output the woofer. By default AUXOUT3 outputs just the tweeter. It
can be configured using Bit 5 in register 0x0122 to output the sum of the tweeter and woofer.
The sub channel is created by adding the left and right woofer channels and diving by two and low pass filtering.
The woofer channel is unaffected by this. The sub channel is then looped back to the input muxes for output on
another channel.
The Main Channel provides a loop back at two points (after Lip Sync and after Loudness) where some of the signal
is then available as an input to any of the other muxes thereby providing a degree of processing to all other
channels.

Analog Devices ADAV4601 Specifications

General

Brand	Analog Devices
Model	ADAV4601
Category	Motherboard
Language	English