ETC AP8306

AP8306
SRS TruSurround XT Audio Processor
AP8306
SRS TruSurround XT Audio Processor
AP8306
SRS TruSurround XT Audio Processor
Table of Contents
1.
2.
3.
4.
5.
OVERVIEW...............................................................................................................................1
APPLICATIONS .......................................................................................................................1
ORDERING INFORMATION.....................................................................................................1
FEATURES...............................................................................................................................1
BLOCK DIAGRAM ...................................................................................................................2
Overview ...........................................................................................................................................................2
TruSurround XT ................................................................................................................................................2
SRS-3D .............................................................................................................................................................3
LT / RT ..............................................................................................................................................................3
SRS 3D-MONO.................................................................................................................................................4
TRUBASS .........................................................................................................................................................4
6.
7.
PIN CONFIGURATION .............................................................................................................5
DEVICE PIN DESCRIPTIONS ..................................................................................................6
SRS TruSurround XT + 5 BAND EQ configuration...........................................................................................6
SRS TruSurround XT + SRS PCT configuration ..............................................................................................6
8.
APPLICATION CIRCUITS ........................................................................................................6
SRS TruSurround XT + 5 BAND EQ ................................................................................................................6
SRS TruSurround XT + SRS PCT ....................................................................................................................6
9.
10.
11.
12.
13.
14.
15.
16.
17.
APPLICATION NOTES.............................................................................................................6
ABSOLUTE MAXIMUM RATINGS ...........................................................................................6
ELECTRICAL CHARACTERISTICS ........................................................................................6
EQUALIZER DESCRIPTION ....................................................................................................6
I2C-BUS CONCEPTS................................................................................................................6
I2C-BUS PROTOCOL ...............................................................................................................6
SUB-ADDRESS BYTE .............................................................................................................6
POWER ON RESET CONDITION ............................................................................................6
DATA BYTE SPECIFICATION .................................................................................................6
SPK, HP, SUB-WOOFER MUTE, INPUT VOLUME (SUB-ADDRESS “XXXB0000”) .....................................6
POWERSAVE on/off, MODE SELECT, INPUT SELECT (SUB-ADDRESS “XXXB0001”)..............................6
ZEROCROSS, TB on/off, TSXT BYPASS, EQ on/off, DC, HP, PL (SUB-ADDRESS “XXXB0010”) ..............6
LEFT SPEAKER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0011”)...................................................6
RIGHT SPEAKER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0100”) ................................................6
LEFT HEADPHONE OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0101”).............................................6
RIGHT HEADPHONE OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0110”) ..........................................6
TRUBASS PUNCH LEVEL (SUB-ADDRESS “XXXB0111”) ............................................................................6
DIALOG CLARITY LEVEL (SUB-ADDRESS “XXXB1000”) .............................................................................6
SUB on/off, SUB INPUT, LPF on/off, PHASE, LPF SETTING (SUB-ADDRESS “XXXB1001”)......................6
SUB-WOOFER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB1010”).....................................................6
EQ BAND 1 LEVEL / SRS PCT HIGH-BAND LEVEL (SUB-ADDRESS “XXXB1011”) ...................................6
EQ BAND 2 LEVEL / SRS PCT MID-BAND LEVEL (SUB-ADDRESS “XXXB1100”)......................................6
EQ BAND 3 LEVEL (SUB-ADDRESS “XXXB1101”)........................................................................................6
EQ BAND 4 LEVEL (SUB-ADDRESS “XXXB1110”)........................................................................................6
EQ BAND 5 LEVEL (SUB-ADDRESS “XXXB1111”)........................................................................................6
18. PACKAGE INFORMATION ......................................................................................................6
AP8306
SRS TruSurround XT Audio Processor
1. OVERVIEW
4. FEATURES
The AP8306 is a highly integrated single chip audio
enhancement processor based on SRS Labs’ patented
audio technologies. TruSurround XT is the combination
of SRS technologies, including TruSurround, Dialog
Clarity, TruBass and WOW.
SRS Technologies
n SRS TruSurround XT
n SRS TruSurround
n SRS WOW
n SRS TruBass
n SRS 3D
n SRS 3D Mono
n SRS Headphone
n SRS Dialog Clarity
n SRS PCT
TruSurround processes multi-channel audio source and
delivers a compelling, virtual surround sound experience
through any two speaker playback system, such as
internal television speakers and headphones. It is fully
compatible with all multi-channel formats up to 6.1
channels. It also supports Dolby Pro Logic, Dolby (AC-3),
DTS, THX and other multi-channel audio source. Dialog
Clarity improves the dialog intelligibility which originally
suffers due to competing signals from other speakers
and the film soundtrack mixed specifically for cinema
playback or loaded with the latest advancement in
special audio effects. TruBass significantly enhances the
bass performance. In addition, WOW is an award
winning
stereo
enhancement
technology
that
significantly improves the performance of stereo (nonsurround sound encoded material) signals through twospeaker system, including headphones. It extends the
sound image in both the horizontal and vertical planes
well beyond the speakers themselves.
The AP8306 has many additional features such as 14
input selectors, line out, digital Dialog Clarity level
control, input volume control, independent mute function
for speaker/headphone/subwoofer and built-in equalizer.
This chip is configured to fulfill different audio
enhancement requirements. The overall chip operation
can be controlled by external MCU through I2C bus
interface providing ease-of-use for audio system
integration.
2. APPLICATIONS
n
n
n
n
n
n
n
LCD TV
PDP TV
Rear Projection TV
HDTV
Digital TV
Set-Top-Box
2.1 DVD Receiver
3. ORDERING INFORMATION
PART NUMBER
PINS
PACKAGE
AP8306-QF-L
100
PQFP
Revision 2.9
Basic Chip Control Functions
n Support decoded signals from DTS 5.1/6.1,
Circle Surround 5.1/6.1, Dolby Digital 5.1/6.1
and Prologic I / Prologic II
n Input selector:
- 14 inputs for MONO mode or
- 7 pairs of inputs for STEREO mode or
- 2 sets of 7 inputs for TruSurround XT mode
n Balance control for Left and Right channel
n 64-step digital output volume attenuator
n 32-step digital input volume control
n Independent mute function
2
n I C bus interface
n 3 separate outputs: speaker out, headphone out
with volume control and line out
n Sub-woofer output
n 64-step volume control for sub-woofer output
n 16 steps for sub-woofer LPF cutoff frequency
n Digital Dialog Clarity level control (64 steps)
n Digital TruBass level control (64 steps)
n 5 Band EQ control in 1dB/step (31 steps per
band)
n SRS PCT High-Band control (16 steps)
n SRS PCT Mid-Band control (16 steps)
n Bandpass filter options for different speaker
size
n Built-in multi-channel decoder for LT/RT mode
n Individual Bypass mode for various functions
n Power save mode
n Built-in zerocross detector to prevent click noise
n Operating voltage: 3V to 5.5V
o
o
n Operating temperature: -20 C to 70 C
Page 1 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
5. BLOCK DIAGRAM
Overview
ST EREO
SU B -W OO FE R
2
P AS SIV E
M A TR IX
4
SR S
TR U SU R R O UN D
IN PU T
+
M U LTIP LEXE R
&
VO L UM E
SR S
D IAL O G
C LA R IT Y
MULTICHANNEL
7
SP EA K ER
2
S RS
TR U B A SS
2
+
MONO
1
S RS
3D -M O N O
SR S
PC T
/
5-B A N D
E Q UA L IZER
LINEOUT
2
SR S 3D
H EA D
PH O N E
2
TruSurround XT
STEREO
2
PA SS IVE
MA T RIX
4
SPE A K ER
+
IN PU T
MU LT IPLE XER
&
VO LU ME
S RS
T RU S U RR O U N D
M UL TICHANNEL
7
S RS
DIA LO G
C L A RITY
2
+
S R S 3D
MONO
1
SRS
3D -M ON O
S RS
T R U BA S S
2
SR S
PC T
/
5-B AN D
EQ U A LIZER
LINEOUT
2
H EA D
PH O N E
2
Inputs of AP8306 are multiplexed into 7 channels and volume is adjusted before passing to the SRS
TRUSURROUND block for TRUSURROUND, SRS HEADPHONE and DIALOG CLARITY processing. The mixed
stereo output will then enter the SRS TRUBASS block for bass enhancement and finally to the SRS PCT / 5-BAND
EQUALIZER block for further processing.
Revision 2.9
Page 2 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
BLOCK DIAGRAM (continued)
SRS-3D
STEREO
2
PASSIVE
MATRIX
4
SPEAKER
+
INPUT
MULTIPLEXER
&
VOLUME
SRS
TRUSURROUND
SRS
DIALOG
CLARITY
M UL TICHANNEL
7
2
SRS
TRUBASS
2
+
SRS
PCT
/
5-BAND
EQUALIZER
LINEOUT
2
SRS 3D
MONO
1
HEAD
PHONE
SRS
3D-M ONO
2
Inputs of AP8306 are first multiplexed into 2 channels and volume is adjusted before passing to the SRS
TRUSURROUND block for SRS-3D, SRS HEADPHONE and DIALOG CLARITY processing. The mixed stereo
output will then enter the SRS TRUBASS block for bass enhancement and finally to the SRS PCT / 5-BAND
EQUALIZER block for further processing.
LT / RT
STEREO
2
PASSIVE
MATRIX
4
SPEAKER
+
INPUT
MULTIPLEXER
&
VOLUME
SRS
TRUSURROUND
M UL TICHANNEL
7
SRS
DIALOG
CLARITY
2
+
SRS 3D
MONO
1
SRS
3D-M ONO
SRS
TRUBASS
2
SRS
PCT
/
5-BAND
EQUALIZER
LINEOUT
2
HEAD
PHONE
2
Inputs of AP8306 are multiplexed into 2 channels and volume is adjusted before passing to the PASSIVE MATRIX
decoder. The decoded 4 signals are fed to the SRS TRUSURROUND block for TRUSURROUND, SRS
HEADPHONE and DIALOG CLARITY processing. The mixed stereo output then enter the SRS TRUBASS block for
bass enhancement and finally to the SRS PCT / 5-BAND EQUALIZER block for further processing.
Revision 2.9
Page 3 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
BLOCK DIAGRAM (continued)
SRS 3D Mono
STEREO
2
PASSIVE
MATRIX
4
SPEAKER
+
INPUT
MULTIPLEXER
&
VOLUME
SRS
TRUSURROUND
SRS
DIALOG
CLARITY
M UL TICHANNEL
7
2
SRS
TRUBASS
2
+
SRS
PCT
/
5-BAND
EQUALIZER
LINEOUT
2
SRS 3D
MONO
1
HEAD
PHONE
SRS
3D-M ONO
2
Inputs of AP8306 are first multiplexed into 1 channel and volume is adjusted before passing to the SRS 3D-MONO
block for SRS MONO-to-STEREO processing. The stereo output will then enter the SRS TRUBASS block for bass
enhancement are finally to the SRS PCT / 5-BAND EQUALIZER block for further processing.
TruBass
STEREO
2
PASSIVE
MATRIX
4
SPEAKER
+
INPUT
MULTIPLEXER
&
VOLUME
SRS
TRUSURROUND
M UL TICHANNEL
7
SRS
DIALOG
CLARITY
2
+
SRS 3D
MONO
1
SRS
3D-M ONO
SRS
TRUBASS
2
SRS
PCT
/
5-BAND
EQUALIZER
LINEOUT
2
HEAD
PHONE
2
Inputs of AP8306 are multiplexed into 2 channels and volume is adjusted before passing to the SRS TRUBASS
block for bass enhancement and finally to the SRS PCT / 5-BAND EQUALIZER block for further processing.
Revision 2.9
Page 4 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
51
31
SLP
100 PIN PQFP
SLPA
SUBOUT
VSA3
VDA3
RVOLI
RMAXO
HPRVOLI
HPLVOLI
LMAXO
LVOLI
OUTPUTR
OUTPUTL
HPOUTR
HPOUTL
PH1R
PH2R
PH3R
PH1L
PH2L
6. PIN CONFIGURATION
PH3L
SMAXO
CH1L
SVOLI
CH1R
GND
CH2L
CLK
CH2R
DATA
CH3L
RSTB
CH3R
A0
CH4L
VDD
B5INR/NC8
CH5L
B5OUTR/PCTRC1
CH5R
CH6L
CH6R
CH7L
SRS
CH7R
VSA4
VDA4
DCIN
FSUMLRCO
RSUMLRO4
RSUMLRO3
RSUMLRO2
RSUMLRO1
RMINRLO4
AP8306-QF-L
CH4R
B4INR/PCTRC2
B4OUTR/NC7
B3INR/PCTRC3
B3OUTR/PCTLC4
B2INR/PCTRC5
B2OUTR/NC6
B1INR/PCTRC6
B1OUTR/NC5
VDA1
VSA1
B1OUTL/NC4
B1INL/PCTLC6
B2OUTL/NC3
B2INL/PCTLC5
B3OUTL/PCTLC4
RMINRLO2
B3INL/PCTLC3
RMINRLO1
B4OUTL/NC2
FMINRLO4
B4INL/PCTLC2
FMINRLO3
B5OUTL/PCTLC1
FMINRLO2
B5INL/NC1
Revision 2.9
Page 5 of 36
VREFB
VSA2
VREF
VDA2
PUNCHIN
BASSOUT
MULTIN
COMPO
COMPC
LPC1
COMPC2
LPC2
CB1B
CB1
CB2
CB2B
CB3B
CB3
MIXOUT
FMINRLO1
81
1
RMINRLO3
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
7. DEVICE PIN DESCRIPTIONS
SRS TruSurround XT + 5 BAND EQ configuration
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Revision 2.9
PIN NAME
B5INL
B5OUTL
B4INL
B4OUTL
B3INL
B3OUTL
B2INL
B2OUTL
B1INL
B1OUTL
VSA1
VDA1
B1OUTR
B1INR
B2OUTR
B2INR
B3OUTR
B3INR
B4OUTR
B4INR
B5OUTR
B5INR
VDD
A0
RSTB
DATA
CLK
GND
SVOLI
SMAXO
SLP
SLPA
SUBOUT
VSA3
VDA3
RVOLI
RMAXO
HPRVOLI
HPLVOLI
LMAXO
LVOLI
OUTPUTR
OUTPUTL
HPOUTR
HPOUTL
PH1R
PH2R
PH3R
PH1L
PH2L
DESCRIPTIONS
Band 5 Left Channel Input
Band 5 Left Channel Output
Band 4 Left Channel Input
Band 4 Left Channel Output
Band 3 Left Channel Input
Band 3 Left Channel Output
Band 2 Left Channel Input
Band 2 Left Channel Output
Band 1 Left Channel Input
Band 1 Left Channel Output
Analog Ground 1
Analog Supply Voltage 1
Band 1 Right Channel Output
Band 1 Right Channel Input
Band 2 Right Channel Output
Band 2 Right Channel Input
Band 3 Right Channel Output
Band 3 Right Channel Input
Band 4 Right Channel Output
Band 4 Right Channel Input
Band 5 Right Channel Output
Band 5 Right Channel Input
Digital Supply Voltage
Address Input
Reset Pin
Serial Data Line
Serial Clock Line
Digital Ground
Sub-woofer Volume Control Input
Sub-woofer Low-Pass Filter Output
Sub-woofer Low-Pass Filter Input
Sub-woofer Low-Pass Filter Input
Sub-woofer Output
Analog Ground 3
Analog Supply Voltage 3
Right Channel Volume Control Input for Speaker Use
Right Channel Maximum Output
Right Channel Volume Control Input for Headphone Use
Left Channel Volume Control Input for Headphone Use
Left Channel Maximum Output
Left Channel Volume Control Input
Right Channel Audio Output for Speaker Use
Left Channel Audio Output for Speaker Use
Right Channel Audio Output for Headphone Use
Left Channel Audio Output for Headphone Use
Right Channel Phase Shift Output1
Right Channel Phase Shift Output2
Right Channel Phase Shift Output3
Left Channel Phase Shift Output1
Left Channel Phase Shift Output2
Page 6 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SRS TruSurround XT + 5 BAND EQ configuration
PIN #
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Revision 2.9
PIN NAME
PH3L
CH1L
CH1R
CH2L
CH2R
CH3L
CH3R
CH4L
CH4R
CH5L
CH5R
CH6L
CH6R
CH7L
CH7R
VSA4
VDA4
DCIN
FSUMLRCO
RSUMLRO4
RSUMLRO3
RSUMLRO2
RSUMLRO1
RMINRLO4
RMINRLO3
RMINRLO2
RMINRLO1
FMINRLO4
FMINRLO3
FMNRLO2
FMINRLO1
MIXOUT
CB3
CB3B
CB2
CB2B
CB1
CB1B
LPC2
LPC1
COMPC2
COMPC
COMPO
MULTIN
BASSOUT
PUNCHIN
VDA2
VSA2
VREF
VREFB
DESCRIPTIONS
Left Channel Phase Shift Output3
Left Channel Audio Input for Stereo Input Channel 1
Right Channel Audio Input for Stereo Input Channel 1
Left Channel Audio Input for Stereo Input Channel 2
Right Channel Audio Input for Stereo Input Channel 2
Left Channel Audio Input for Stereo Input Channel 3
Right Channel Audio Input for Stereo Input Channel 3
Left Channel Audio Input for Stereo Input Channel 4
Right Channel Audio Input for Stereo Input Channel 4
Left Channel Audio Input for Stereo Input Channel 5
Right Channel Audio Input for Stereo Input Channel 5
Left Channel Audio Input for Stereo Input Channel 6
Right Channel Audio Input for Stereo Input Channel 6
Left Channel Audio Input for Stereo Input Channel 7
Right Channel Audio Input for Stereo Input Channel 7
Analog Ground 4
Analog Supply Voltage 4
Dialog Clarity Input
Dialog Clarity Input
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Front Perspective Network Output
Front Perspective Network Output
Front Perspective Network Output
Front Perspective Network Output
Left and Right Channel Mixed Output
Center Bandpass Filter3 Input
Center Bandpass Filter3 Output
Center Bandpass Filter2 Input
Center Bandpass Filter2 Output
Center Bandpass Filter1 Input
Center Bandpass Filter1 Output
TruBass Low-Pass Filter Output
TruBass Low-Pass Filter Output
TruBass Compressor Capacitor Output
TruBass Compressor Capacitor Output
TruBass Compressor Output
TruBass Multiplier Input
TruBass Output
TruBass Punch Input
Analog Supply Voltage 2
Analog Ground 2
Reference Voltage Input
Reference Voltage Output
Page 7 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SRS TruSurround XT + SRS PCT configuration
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Revision 2.9
PIN NAME
NC
PCTLC1
PCTLC2
NC2
PCTLC3
PCTLC4
PCTLC5
NC3
PCTLC6
NC4
VSA1
VDA1
NC5
PCTRC6
NC6
PCTRC5
PCTRC4
PCTRC3
NC7
PCTRC2
PCTRC1
NC8
VDD
A0
RSTB
DATA
CLK
GND
SVOLI
SMAXO
SLP
SLPA
SUBOUT
VSA3
VDA3
RVOLI
RMAXO
HPRVOLI
HPLVOLI
LMAXO
LVOLI
OUTPUTR
OUTPUTL
HPOUTR
HPOUTL
PH1R
PH2R
PH3R
PH1L
PH2L
DESCRIPTIONS
Not Connected
PCT Capacitor Output for Left Channel
PCT Capacitor Output for Left Channel
Not Connected
PCT Capacitor Output for Left Channel
PCT Capacitor Output for Left Channel
PCT Capacitor Output for Left Channel
Not Connected
PCT Capacitor Output for Left Channel
Not Connected
Analog Ground 1
Analog Supply Voltage 1
Not Connected
PCT Capacitor Output for Right Channel
Not Connected
PCT Capacitor Output for Right Channel
PCT Capacitor Output for Right Channel
PCT Capacitor Output for Right Channel
Not Connected
PCT Capacitor Output for Right Channel
PCT Capacitor Output for Right Channel
Not Connected
Digital Supply Voltage
Address Input
Reset Pin
Serial Data Line
Serial Clock Line
Digital Ground
Sub-woofer Volume Control Input
Sub-woofer Low-Pass Filter Output
Sub-woofer Low-Pass Filter Input
Sub-woofer Low-Pass Filter Input
Sub-woofer Output
Analog Ground 3
Analog Supply Voltage 3
Right Channel Volume Control Input for Speaker Use
Right Channel Maximum Output
Right Channel Volume Control Input for Headphone Use
Left Channel Volume Control Input for Headphone Use
Left Channel Maximum Output
Left Channel Volume Control Input
Right Channel Audio Output for Speaker Use
Left Channel Audio Output for Speaker Use
Right Channel Audio Output for Headphone Use
Left Channel Audio Output for Headphone Use
Right Channel Phase Shift Output1
Right Channel Phase Shift Output2
Right Channel Phase Shift Output3
Left Channel Phase Shift Output1
Left Channel Phase Shift Output2
Page 8 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SRS TruSurround XT + SRS PCT configuration
PIN #
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Revision 2.9
PIN NAME
PH3L
CH1L
CH1R
CH2L
CH2R
CH3L
CH3R
CH4L
CH4R
CH5L
CH5R
CH6L
CH6R
CH7L
CH7R
VSA4
VDA4
DCIN
FSUMLRCO
RSUMLRO4
RSUMLRO3
RSUMLRO2
RSUMLRO1
RMINRLO4
RMINRLO3
RMINRLO2
RMINRLO1
FMINRLO4
FMINRLO3
FMNRLO2
FMINRLO1
MIXOUT
CB3
CB3B
CB2
CB2B
CB1
CB1B
LPC2
LPC1
COMPC2
COMPC
COMPO
MULTIN
BASSOUT
PUNCHIN
VDA2
VSA2
VREF
VREFB
DESCRIPTIONS
Left Channel Phase Shift Output3
Left Channel Audio Input for Stereo Input Channel 1
Right Channel Audio Input for Stereo Input Channel 1
Left Channel Audio Input for Stereo Input Channel 2
Right Channel Audio Input for Stereo Input Channel 2
Left Channel Audio Input for Stereo Input Channel 3
Right Channel Audio Input for Stereo Input Channel 3
Left Channel Audio Input for Stereo Input Channel 4
Right Channel Audio Input for Stereo Input Channel 4
Left Channel Audio Input for Stereo Input Channel 5
Right Channel Audio Input for Stereo Input Channel 5
Left Channel Audio Input for Stereo Input Channel 6
Right Channel Audio Input for Stereo Input Channel 6
Left Channel Audio Input for Stereo Input Channel 7
Right Channel Audio Input for Stereo Input Channel 7
Analog Ground 4
Analog Supply Voltage 4
Dialog Clarity Input
Dialog Clarity Input
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Rear Perspective Network Output
Left and Right Channel Mixed Output
Center Bandpass Filter3 Input
Center Bandpass Filter3 Output
Center Bandpass Filter2 Input
Center Bandpass Filter2 Output
Center Bandpass Filter1 Input
Center Bandpass Filter1 Output
TruBass Low-Pass Filter Output
TruBass Low-Pass Filter Output
TruBass Compressor Capacitor Output
TruBass Compressor Capacitor Output
TruBass Compressor Output
TruBass Multiplier Input
TruBass Output
TruBass Punch Input
Analog Supply Voltage 2
Analog Ground 2
Reference Voltage Input
Reference Voltage Output
Page 9 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
8. APPLICATION CIRCUITS
R36
4. 9K
C48
10U
C49
0.1U
1
2
3
JP 1
22N
C85
C54
AVDD 10U
R17
R18
R19
RV19
0.1U
C18
RV23
R23
RV17
RV18
R22
RV21
0.1U
C20
R25
R21
C45
0.1U
0. 1U
C94
C43
10N
R12
C11
4.7N
10N
C9
AVDD
4. 7N
C10
10U
C55
0.1U
C50
C33
10U
CH7R
CH4R
C32
10U
CH6R
C31
10U
C28
10U
CH5L
CH7L
CH6L
C30
10U
C29
10U
CH5R
C76
10U
2M EG
4.7N
C8
0. 47U
C3
C12
10N
10N
C6
CH4L
C77
10U
80
FMINRLO 2
79
FMINRLO 3
78
FMINRLO 4
77
RMINRLO 1
76
RMINRLO 2
75
RMINRLO 3
74
RMINRLO 4
73
RSUMLRO 1
72
RSUMLRO 2
71
RSUMLRO 3
70
RSUMLRO 4
69
FSUMLRCO
68
DCI N
67
VDA4
66
VSA4
65
CH7R
64
CH7L
63
CH6R
62
CH6L
61
CH5R
60
CH5L
59
CH4R
58
CH4L
57
CH3R
56
CH3L
55
CH2R
54
CH2L
53
CH1R
52
CH1L
51
PH3L
C46
4. 7N
C47
0.47N
C44
2. 2N
CH3R
C78
10U
10U
C84
A P 8306PQ
AP8306-QF-L
2MEG
C7
4.7N
CH3L
CH2R
C80
10U
C66
1N
SUBO UT
C67
1N
R44
4. 9K
R43
JP1 1st dat a byt e
1-2
0000010
2-3
0000000
C37
0.1U
SDA
SCL
C68
3.3N
4.9K
C69
3. 3N
1
B5INL
2
B5OUT L
3
B4INL
4
B4OUT L
5
B3INL
6
B3OUT L
7
B2INL
8
B2OUT L
9
B1INL
10
B1OUT L
11
VSA1
12
VDA1
13
B1OUT R
14
B1INR
15
B2OUT R
16
B2INR
17
B3OUT R
18
B3INR
19
B4OUT R
20
B4INR
21
B5OUT R
22
B5INR
23
VDD
24
A0
25
RSTB
26
DATA
27
CLK
28
G ND
29
SVOLI
30
SMAXO
C2
4.7N
C42
0.1U
C53
0.1U
CH2L
C81
10U
C70
10N
4. 9K
C71
10N
R42
R41
R40
4.9K
C72
33N
100
VREF B
99
VREF
98
VSA2
97
VDA2
96
PUNCHIN
95
BASSO UT
94
M ULT IN
93
CO M PO
92
CO M PC
91
CO M PC2
90
LPC1
89
LPC2
88
CB1B
87
CB1
86
CB2B
85
CB2
84
CB3B
83
CB3
82
M IXO UT
81
F M INRLO 1
10N
C60
33N
C62
C74
0.1U
C73
33N
C1
1U
10U
C26
C79
10U
C13
4. 7U
31
SLP
32
SLPA
33
SUBO UT
34
VSA3
35
VDA3
36
RVO LI
37
RM AXO
38
HPRVO LI
39
HPLVO LI
40
LM AXO
41
LVO LI
42
O UT PUT R
43
O UT PUT L
44
HPO UT R
45
HPO UT L
46
PH1R
47
PH2R
48
PH3R
49
PH1L
50
PH2L
3. 3N
C58
C40
0.1U
C75
0. 1U
R27
0.1U
C51
1N
C56
0.1U
C64
4.9K
C41
10U
AVDD
C19
0. 1U
C86
10U
0.1U
C65
3.3N
C59
10N
C61
C21
0.1U
R7
4.9K
R37
4.9K
R38
4. 9K
R39
33N
C63
1N
C57
4.9K
R35
10U
C52
C23
0. 1U
RV27
C22
0. 1U
AVDD
RV22
R26
RV25
RV26
10U
C27
10U
C39
C25
CV1
C24
CV1
SRS TruSurround XT + 5 BAND EQ
C82
10U
CH1R
C89
10U
Revision 2.9
Page 10 of 36
C83
10U
C97
10U
C98
10U
HPO UT L
C93
10U
O UT PUT L
C92
10U
LI NEO UT L
C96
10U
LI NEO UT R
C95
10U
CH1L
C91
10U
HPO UT R
C90
10U
O UT PUT R
C88
10U
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
R19
R17
RV19
RV2 3
0.1U
C18
RV17
R18
R21
RV18
RV21
R22
C48
10U
1
2
3
C49
0.1U
C37
0.1U
J P1
10U
C84
22N
C85
0.1U
C94
C47
0.47N
AVDD
4.7N
C10
C12
10N
R12
10U
C55
0.1U
C50
C33
10U
CH7R
CH5L
CH4R
CH7L
C32
10U
CH5R
CH6R
C31
10 U
2MEG
C11
4.7N
10N
C9
CH6L
C30
10U
SDA
SCL
AP8306-QF-L
AP8306PQ
4.7N
C8
0.47U
C3
C29
10U
10K
0.1U
0.015U C63
C62
4.7N
C65
10N
C6
C28
10U
C41
10U
C64
10 U
C61
0.015U
R9
80
FMINRLO2
79
FMINRLO3
78
FMINRLO4
77
RMINRLO1
76
RMINRLO2
75
RMINRLO3
74
RMINRLO4
73
RSUMLRO1
72
RSUMLRO2
71
RSUMLRO3
70
RSUMLRO4
69
FSUMLRCO
68
DCIN
67
VDA4
66
VSA4
65
CH7R
64
CH7L
63
CH6R
62
CH6L
61
CH5R
60
CH5L
59
CH4R
58
CH4L
57
CH3R
56
CH3L
55
CH2R
54
CH2L
53
CH1R
52
CH1L
51
PH3L
C76
10 U
C57
0.015U
2MEG
C7
4.7N
CH4L
CH3R
C45
0.1U
C46
4.7N
C78
10U
C59
4.7N
C60
10U
R8
10K
C58
0.1U
1
NC1
2
PCTLC1
3
PCTLC2
4
NC2
5
PCTLC3
6
PCTLC4
7
PCTLC5
8
NC3
9
PCTLC6
10
NC4
11
VSA1
12
VDA1
13
NC5
14
PCTRC6
15
NC6
16
PCTRC5
17
PCTRC4
18
PCTRC3
19
NC7
20
PCTRC2
21
PCTRC1
22
NC8
23
VDD
24
A0
25
RSTB
26
DATA
27
CLK
28
GND
29
SVOLI
30
SMAXO
C2
4.7N
C77
10U
10U
C26
C51
0.1U
100
VREFB
99
VREF
98
VSA2
97
VDA2
96
PUNCHIN
95
BASSOUT
94
MULTIN
93
COMPO
92
COMPC
91
COMPC2
90
LPC1
89
LPC2
88
CB1B
87
CB1
86
CB2B
85
CB2
84
CB3B
83
CB3
82
MIXOUT
81
FMINRLO1
C52
10U
C13
4.7U
C27
10U
C56
0.015U
JP1 1st data byte
1-2
0000010
2-3
0000000
0.1 U
C20
R7
C1
1U
31
SLP
32
SLPA
33
SUBOUT
34
VSA3
35
VDA3
36
RVOL I
37
RMAXO
38
HPRVOLI
39
HPLVOLI
40
LMAXO
41
LVOLI
42
OUTPUTR
43
OUTPUTL
44
HPOUTR
45
HPOUTL
46
PH1R
47
PH2R
48
PH3R
49
PH1L
50
PH2L
C39
10U
CV1
C24
AVDD
C19
0.1U
AVDD
CV1
C25
C40
0.1U
C21
0.1U
RV2 7
R27
C23
0.1U
R23
R25
C22
0.1U
RV22
R26
RV25
RV26
SRS TruSurround XT + SRS PCT
C79
10 U
CH3L
CH2R
C98
10U
Page 11 of 36
CH1L
C83
10U
C97
10U
HPOUTL
C93
10U
C82
10U
CH1R
C92
10U
OUTPUTL
C96
10U
LINEOUTR
C42
0.1U
C91
10U
HPOUTR
C89 C90
10U
10U
C81
10U
CH2L
C88
10U
C95
10U
Revision 2.9
C44
2.2N
C80
10U
C43
10N
C53
0.1U
OUTPUTR
C54
AVDD 10U
LINEOUTL
SUBOUT
C86
10U
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
9. APPLICATION NOTES
n
n
n
n
n
n
n
n
Tolerance of all resistors = 1%
Tolerance of capacitors = 5%
Speaker out signal can be obtained through pin 42 and 43.
Headphone out signal can be obtained through pin 44 and 45.
Line out signal can be obtained through pin 37 and 40.
Volume of speaker out and headphone out signals can be controlled separately.
SRS PCT and 5-BAND EQUALIZER use different external components, user cannot switch
between these two modes by using software only. They must change the corresponding
components on the PCB.
The TruBass filter setting depends on the resonant frequency (fo) of the speaker. Choose
different filter settings in accordance with fo of the speaker for the actual application.
FILTERS SETTING FOR TRUBASS
fo
40Hz
60Hz
100Hz
150Hz
200Hz
250Hz
300Hz
400Hz
R17
71.5k
47.5k
28.7k
19.1k
14.3k
11.3k
9.53k
7.15k
R18
11.5k
7.68k
4.64k
3.09k
2.32k
1.87k
1.54k
1.15k
R19
158k
107k
63.4k
42.2k
31.6k
25.5k
21k
15.8k
R21
37.4k
24.9k
15k
10k
7.5k
6.04k
5.62k
4.53k
R22
8.06k
5.36k
3.24k
2.15k
1.62k
1.3k
1.21k
976
R23
107k
71.5k
42.2k
28k
21k
16.9k
15.8k
12.7k
R25
22.6k
15k
8.87k
5.9k
4.42k
3.57k
3.57k
3.01k
R26
6.34k
4.22k
2.55k
1.69k
1.27k
1.02k
1.02k
845
R27
78.7k
53.6k
31.6k
21k
15.8k
12.7k
12.7k
10.7k
C24
0.39µ
0.27µ
0.15µ
0.1µ
0.082µ
0.068µ
0.056µ
0.039µ
C25
0.39µ
0.27µ
0.15µ
0.1µ
0.082µ
0.068µ
0.056µ
0.039µ
10. ABSOLUTE MAXIMUM RATINGS
[Under no circumstances should the absolute maximum ratings given below be violated. Stresses exceeding
one or more of the limiting values may cause permanent damage to the device.]
Revision 2.9
PARAMETER
SYMBOL
RATING
UNIT
Supply Voltage
Vcc
6
V
Power Dissipation
Pd
250
mW
Operating Temperature Range
Topr
-20 to 70
ºC
Storage Temperature Range
Tstg
-25 to 100
ºC
Page 12 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
11.
ELECTRICAL CHARACTERISTICS
[Refer to the application circuit VCC=3.3V, Ta=25oC, f=1kHz, all controls flat unless otherwise specified]
PARAMETER
TEST CONDITION
SYMBOL
MIN.
TYP.
MAX.
UNIT
-
3
3.3
5.5
V
µA
MODE
TS
EQ/PCT
TB
-
-
-
SUPPLY
Supply Voltage
Supply Current
(POWERSAVE mode OFF)
Supply Current
(POWERSAVE mode ON
Sub-woofer ON)
Vcc
Ipd
PD
-
-
-
-
150
Inor
NORMAL
-
-
-
-
42
Inor
TSXT
-
-
37.7
-
-
38.6
-
-
37.8
LTRT
SRS3D
Note
Sub-woofer block consume ~ 1.5mA
under 3.3V supply voltage
ON
ON
ON
MONO
-
-
35.2
TRUBASS
-
-
32.0
-
-
31.8
TSXT
-
-
30.0
LTRT
-
-
30.8
-
-
30.0
MONO
-
-
27.4
TRUBASS
-
-
24.0
-
-
-
24.0
-
-
32.6
-
-
33.5
-
-
32.6
-
SRS3D
OFF
ON
ON
OFF
OFF
TSXT
LTRT
SRS3D
ON
OFF
ON
mA
MONO
-
-
30.1
TRUBASS
-
-
26.8
-
-
26.8
-
-
24.8
-
-
25.7
-
-
25.0
MONO
-
-
22.4
TRUBASS
-
-
19.0
-
-
18.9
-
80
-
dB
-
OFF
TSXT
LTRT
SRS3D
ON
OFF
OFF
-
OFF
SVR
-
-
-
Vref
-
-
-
-
0.5Vcc
-
V
Total Volume Set Error (absolute)
|∆Ga|
-
-
-
-
-
2
dB
Total Tracking Error |ch.L – ch.R|
|∆Gt|
-
-
-
-
-
0.2
dB
Output noise
(f=20 to 20kHz)
Nout
TSXT
-
-84
-
LTRT
-
-91
-
-
-91
-
MONO
-
-91
-
TRUBASS
-
-87
-
Supply Rejection
-
GENERAL
Internal Reference Voltage
SRS3D
Revision 2.9
OFF
Page 13 of 36
OFF
OFF
dBV
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ELECTRICAL CHARACTERISTICS (continued)
[Refer to the application circuit VCC=3.3V, T a=25oC, all controls flat unless otherwise specified]
PARAMETER
TEST CONDITION
SYMBOL
MIN.
TYP.
MAX.
-
-78
-
-
-80
-
-
-81
-
MONO
-
-86
-
TRUBASS
-
-87
-
MODE
TS
EQ/PCT
UNIT
TB
GENERAL
(1)
Output Noise
(f=20 to 20kHz)
Nout
TSXT
LTRT
SRS3D
ON
OFF
TSXT
-
-78
-
LTRT
-
-81
-
-
-81
-
MONO
-
-81
-
TRUBASS
-
-80
-
TSXT
-
-75
-
LTRT
-
-77
-
-
-78
-
SRS3D
SRS3D
OFF
ON
OFF
OFF
ON
ON
MONO
-
-80
-
TRUBASS
-
-80
-
TSXT
-
-64
-
-
-67
-
-
-67
-
LTRT
SRS3D
OFF
EQ
MAX
OFF
MONO
-
-67
-
TRUBASS
-
-66
-
TSXT
-
-75
-
-
-78
-
LTRT
OFF
PCT
MAX
OFF
-
-78
-
MONO
-
-78
-
TRUBASS
-
-77
-
TSXT
-
-59
-
-
-61
-
-
-61
-
MONO
-
-61
-
TRUBASS
-
-66
-
SRS3D
LTRT
SRS3D
OFF
EQ
MAX
ON
TSXT
-
-73
-
LTRT
-
-76
-
-
-76
-
MONO
-
-76
-
TRUBASS
-
-75
-
SRS3D
(1)
OFF
OFF
PCT
MAX
ON
dBV
Output noise is independent of operating voltage. Figures above can be applied for both 3.3V & 5.5V supply voltage.
Revision 2.9
Page 14 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ELECTRICAL CHARACTERISTICS (continued)
[Refer to the application circuit VCC=5V, T a=25oC, 100Hz TRUBASS filter setting, all controls flat unless
otherwise specified]
PARAMETER
TEST CONDITION
SYMBOL
MODE
TS
EQ/PCT
MIN.
TYP.
MAX.
UNIT
TB
GENERAL
Maximum Input Voltage
THD=3%
(Input at one channel only)
VIM
TSXT
-
6
-
LTRT
-
6
-
-
6
-
-
6
-
-
6
-
OFF
SRS3D
OFF
OFF
MONO
TRUBASS ON/OFF
4
TSXT
LTRT
ON
OFF
0
OFF
SRS3D
3
MONO
3
TSXT
-
5
-
LTRT
-
5
-
-
5
-
-
1
-
-
0
-
-
3
-
-
-2
-
SRS3D
-
0
-
MONO
-
-4
-
TSXT
-
-13
-
-
-13
-
-
-13
-
-
-13
-
-
-19
-
-
3
-
-
3
-
-
3
-
-
3
-
OFF
SRS3D
OFF
ON
MONO
TRUBASS ON/OFF
TSXT
LTRT
LTRT
ON
OFF
SRS3D
OFF
EQ
MAX
ON
OFF
MONO
TRUBASS ON/OFF
TSXT
LTRT
SRS3D
OFF
PCT
MAX
OFF
MONO
2
TRUBASS
TSXT
LTRT
Total Harmonic Distortion
(Vin=-30dBV, f=1kHz)
Revision 2.9
THD
OFF
PCT
MAX
ON
-
1
-
-
1
-
-
1
-
MONO
-
-2
-
TRUBASS
-
-5
-
-
-
0.2
SRS3D
NORMAL
dBV
ANY
Page 15 of 36
ANY
ANY
%
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ELECTRICAL CHARACTERISTICS (continued)
[Refer to the application circuit VCC=3.3V, T a=25oC, f=1kHz, all controls flat unless otherwise specified]
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
70
75
80
kΩ
INPUT MASTER VOLUME
Input Resistance
Rin
At pins 52- 65
Control Range
Crange
30.5
31
31.5
dB
Maximum Attenuation
Amax
-19
-20
-21
dB
Maximum Gain
Gmax
9.5
10
10.5
dB
Step Resolution
Astep
0.9
1
1.1
dB
Volume Set Error (absolute)
|∆Ga|
G = 10 through –21dB
-
-
1
dB
|∆Gt|
G = 10 through –21dB
-
-
0.1
dB
Tracking Error |ch.L – ch.R|
OUTPUT BALANCE AND VOLUME CONTROL
Control Range
Crange
60.5
62
62.5
dB
Maximum Attenuation
Amax
60.5
62
62.5
dB
Step Resolution
Astep
0.75
1
1.1
dB
|∆Ga|
G = 0 through –62dB
-
-
1.5
dB
|∆Gt|
G = 0 through –62dB
-
-
0.1
dB
90
100
-
dB
Attenuation Set Error (absolute)
Tracking Error |ch.L – ch.R|
Mute Attenuation
Amute
5-BAND EQ CONTROL
Step Resolution
0.8
1
1.2
dB
|∆Ga|
G = -15 through 15dB
-
-
0.5
dB
|∆Gt|
G = -15 through 15dB
-
-
0.1
dB
Band1 Control Range
Crange
f=100Hz
±14.5
±15
±15.5
dB
Band2 Control Range
Crange
f=300Hz
±14.5
±15
±15.5
dB
Band3 Control Range
Crange
f=1kHz
±14.5
±15
±15.5
dB
Band4 Control Range
Crange
f=3kHz
±14.5
±15
±15.5
dB
Band5 Control Range
Crange
f=10kHz
±14.5
±15
±15.5
dB
(1)
Set Error (absolute)
(1)
Tracking Error |ch.L – ch.R|
Astep
PCT CONTROL
Step Resolution
Astep
-
0.067
-
%
Mid-Band Control Range
Crange
TS off, TB off, f=1kHz
-
4
-
dB
High-Band Control Range
Crange
TS off, TB off, f=10kHz
-
7
-
dB
-
0.016
-
%
-
8.5
-
dB
-
0.016
-
%
TB mode, L->L
-
6
-
dB
TB mode, L->R
-
8.5
-
dB
DIALOG CLARITY CONTROL
Step Resolution
Astep
Control Range
Crange
TSXT mode, CENTERIN only, f=20kHz
TRUBASS CONTROL
Step Resolution
Astep
Control Range
(f=100Hz, 100Hz filter setting)
Crange
(1)
Set Error and Tracking Error depend on external components. The above values assume 1% variation of external components.
Revision 2.9
Page 16 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ELECTRICAL CHARACTERISTICS (continued)
[Refer to the application circuit VCC=3.3V, T a=25oC, f=1kHz, all controls flat unless otherwise specified]
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
-
150
-
Hz
SUB-WOOFER
LPF Cut-off Frequency Range
Frange
Step Resolution
Fstep
-
10
-
Hz
Minimum Cut-off Frequency Range
Fmin
-
30
-
Hz
Maximum Cut-off Frequency Range
Fmax
-
180
-
Hz
-
1Vcc
-
V
AUDIO OUTPUT
Maximum Output Voltage
Vom
THD=3% at pin 37,40,42,43,44,45
Output DC Voltage Level
Vdc
At pin 37.40,42,43,44,45
-
0.5Vcc
-
V
Output Resistance
Rout
At pin 37.40,42,43,44,45
150
200
250
Ω
2
DIGITAL CIRCUIT (I C-BUS)
Input High Voltage for Pin 25, 26, 27
VIH
0.7Vcc
-
-
V
Input Low Voltage for Pin 25, 26, 27
VIL
-
-
0.3 Vcc
V
Output-Low Current for Pin 26
IOL
-
4
-
mA
Internal Pull-up Resistance at Pin 25
Rpu
-
50
-
kΩ
INPUT VOLUME SET ERROR VS.
SOFTWARE VOLUME CONTROL
2
f=1kHz
1
0
-1
-2
-70
Revision 2.9
-50
-30
-10
Sc - SOFTW ARE CONTROL (dB)
10
Page 17 of 36
∆ Ga - ATTENUA TION SET ERROR (dB)
∆ Ga - ATTENUA TION SET ERROR (dB)
OUTPUT VOLUME SET ERROR VS.
SOFTWARE VOLUME CONTROL
2
f=1kHz
1
0
-1
-2
-25
-15
-5
5
Sc - SOFTW ARE CONTROL (dB)
15
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
12.
EQUALIZER DESCRIPTION
12.1 EQ Control Circuit
In AP8306, there is a five-band, digitally controlled stereo equalizer. The circuit structures of the five bands are the
same and they are connected in a serial format. Each band can be considered as a filtering cell which can boost or
cut the signal at certain frequency range.
A. Boost mode
fO =
IN
OUT
Q≈
R3
R2
C1
1
1
(C1)(C2)(R2)
C1 + C2
R1
R2 + R3
+2
R1
G V = 20 log
R3
+2
R1
C2
R1
(Hz)
2 π R1(R2 + R3 )(C1)(C2)
(dB)
B. Cut mode
IN
OUT
R2
fO =
R3
Q≈
C2
1
2 π R1(R2 + R3 )(C1)(C2)
1
(C1)(C2)(R2)
C1 + C2
R1
R3
+2
GV = 20 log R1
R2 + R3
+2
R1
C1
R1
(Hz)
(dB)
Under both boost and cut mode, their center frequency (f o), Q-factor (Q) and maximum gain (Gv) can be controlled by
the external components (C1, C2, R1). Corresponding instance names in application circuit are shown below:
LEFT CHANNEL
INSTANCE NAME IN STRUCTURE
INSTANCE NAME IN APPLICATION CIRCUIT
Revision 2.9
RIGHT CHANNEL
BAND1
C1
C64
C2
C65
R1
R39
C1
C74
C2
C75
R1
R40
BAND2
C63
C62
R38
C73
C72
R41
BAND3
C61
C60
R37
C71
C70
R42
BAND4
C59
C58
R36
C69
C68
R43
BAND5
C57
C56
R35
C67
C66
R44
Page 18 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
12.2 EQ Characteristics
Figure 1: Band1 Frequency Response
Figure 4: Band4 Frequency Response
R2+R3 = 45.3k
C1=C2=0.1u
R1=4.9k
Figure 2: Band2 Frequency Response
R2+R3 = 45.3k
C1=C2=3.3n
R1=4.9k
Figure 5: Band5 Frequency Response
R2+R3 = 45.3k
C1=C2=33n
R1=4.9k
R2+R3 = 45.3k
C1=C2=1n
R1=4.9k
Figure 3: Band3 Frequency Response
R2+R3 = 45.3k
C1=C2=10n
R1=4.9k
Revision 2.9
Page 19 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
13.
I2C-BUS CONCEPTS
I2C-bus is a simple bi-directional, 2-wire serial
data (SDA) and serial clock (SCL) bus for interIC control. Both lines must be connected to a
positive supply via a pull-up resistor when
connected to output of device.
Device Address
After the Start condition, the address of a
Slave device is sent. This address is 7 bits
long followed by an 8th-bit which is a data
direction bit (R/W): 0 indicates a transmission
(Write), 1 indicates a request for data (Read).
Data Validity
One data bit is transferred during each clock
pulse. The data on the SDA line must remain
stable during the HIGH period of the clock
pulse. Changes in the data line at this time will
be interpreted as control signals.
Acknowledge
There is no limit to the number of data byte
transferred between the start and the stop
conditions from transmitter to receiver. Each
byte of 8 bits is followed by an acknowledge
bit (ACK). A slave receiver must generate an
ACK receiving each byte. Also a master must
generate an ACK after receiving each byte
that has been clocked out of the slave
transmitter. Device that acknowledges has to
pull down the SDA line during the
acknowledge clock pulse, so that the SDA
line is stable LOW during the HIGH period of
the ACK related clock pulse, set-up and hold
times must be taken into consideration. A
master receiver must signal the end of data to
the transmitter by not generating an ACK on
the last byte that has been clocked out of the
slave. In this case, the transmitter must
release the data line HIGH to allow the
master to generate a stop condition.
SDA
SCL
SDA stable
data valid
change
of data
allowed
Data Transfer
Start And Stop Conditions
Both data and clock remain HIGH when the
bus is not busy. A HIGH-to-LOW transition of
the data, while the clock is HIGH, is defined as
the start condition (S). A LOW-to-HIGH
transition of the data line while the clock is
HIGH is defined as the stop condition (P).
SDA
SDA
SCL
SCL
S
P
START condition
STOP condition
Definition of START and STOP condition
DATA OUTPUT
BY TRANSMITTER
not acknowledge
DATA OUTPUT
BY RECEIVER
acknowledge
SCL FROM
MASTER
1
2
8
9
clock pulse for
acknowledge
START
condition
2
Acknowledgement on I C-bus
Revision 2.9
Page 20 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
Overall Diagram
MSB
LSB
~ ~
~
~
~
~ ~
SDA
MSB
7
2-6
Slave Address
Start
Condition
*ACK
~
~
~
~
1
SCL
*NAK
LSB
1
8
9
R/W
ACK
2-7
DATA
8
9
ACK
Stop
Condition
* NAK – SDA line is HIGH
**ACK – SDA line is pulled LOW by receiver
Overall Diagram
I2C-BUS PROTOCOL
14.
The interface protocol comprises:
n
A start condition (S)
n
A chip address byte
n
A sub-address byte
n
n
CHIP ADDRESS
SUB-ADDRESS
MSB
S
0
LSB
0
0
0
0
A sequence of data + acknowledge (A)
A stop condition (P)
0
A0
0
DATA 1 to DATA n
MSB
A
X
LSB
X
X
B
MSB
DATA
A
LSB
DATA
A
P
“A0” of chip address must match the logic sense at pin 24
Non-Incremental Bus
The user sends a start condition, the correct chip address, a sub-address with B=0 (nonincremental bus), an 8-bit data byte, a stop condition.
SUB-ADDRESS
CHIP ADDRESS
MSB
S
0
LSB
0
0
0
0
0
A0
0
MSB
A
X
1 BYTE DATA
LSB
X
X
0 D3 D2 D1 D0
MSB
LSB
A D7 D6 D5 D4 D3 D2 D1 D0 A
P
Incremental Bus
The user sends a start condition, the correct chip address, a sub-address with B=1 (incremental
bus), a series of 8-bit data bytes and a stop condition. Now the chip is in a loop condition with an
auto increment of the sub-address. The 1st data byte will be sent to the sub-address, the 2nd data
byte will be sent to the sub-address plus one, etc., and will end when the stop condition is received.
CHIP ADDRESS
SUB-ADDRESS
MSB
S
0
LSB
0
Revision 2.9
0
0
0
0
A0
0
MSB
A
X
DATA 1 to DATA n
LSB
X
X
1
D3 D2 D1 D0
Page 21 of 36
MSB
A
LSB
DATA
A
P
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
15.
SUB-ADDRESS BYTE
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
B
0
0
0
0
SPK MUTE, HP MUTE, SUB-WOOFER MUTE, INPUT VOLUME
X
X
X
B
0
0
0
1
POWERSAVE on/off, MODE SELECT, INPUT SELECT
X
X
X
B
0
0
1
0
ZEROCROSS, TB on/off, TSXT BYP, PCT/EQ on/off, DC, HP, PL
X
X
X
B
0
0
1
1
LEFT SPEAKER ATTENUATE
X
X
X
B
0
1
0
0
RIGHT SPEAKER ATTENUATE
X
X
X
B
0
1
0
1
LEFT HEADPHONE ATTENUATE
X
X
X
B
0
1
1
0
RIGHT HEADPHONE ATTENUATE
X
X
X
B
0
1
1
1
TRUBASS PUNCH LEVEL
X
X
X
B
1
0
0
0
DIALOG CLARITY LEVEL
X
X
X
B
1
0
0
1
SUB INPUT, SUB on/off, LPF on/off, PHASE, LPF SETTING
X
X
X
B
1
0
1
0
SUB-WOOFER ATTENUATE
X
X
X
B
1
0
1
1
EQ BAND 1 LEVEL / SRS PCT HIGH-BAND LEVEL
X
X
X
B
1
1
0
0
EQ BAND 2 LEVEL / SRS PCT MID-BAND LEVEL
X
X
X
B
1
1
0
1
EQ BAND 3 LEVEL
X
X
X
B
1
1
1
0
EQ BAND 4 LEVEL
X
X
X
B
1
1
1
1
EQ BAND 5 LEVEL
B = 0 non-incremental
B = 1 incremental
Revision 2.9
Page 22 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
16.
POWER ON RESET CONDITION
SUB-ADDRESS BYTE
POWER ON RESET CONDITION
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
Mode Status
D0
X
X
X
B
0
0
0
0
X
X
X
B
0
0
0
1
Bit
Status
Speaker output: MUTE
Headphone output: MUTE
Sub-woofer output: MUTE
Input volumes: 0dB
Power-save mode: ON
SRS audio mode: TSXT + SRS PCT
Selected input channels: CH1L,CH1R,
CH2L,CH2R,
CH3L,CH3R,CH4L
Zero cross: ON
TruBass enhancement: ON
TSXT BYPASS: OFF
PCT / EQ: ON
DIALOG CLARITY: ON
SRS HEADPHONE mode: OFF
Prologic mode supported: 6.1 Mode
D7
D6
D5
D4:D0
D7
D6:D3
D2:D0
1
1
1
10101
1
0000
000
D7
D6
D5
D4
D3
D2
D1:D0
1
1
0
1
1
0
00
X
X
X
B
0
0
1
0
X
X
X
B
0
0
1
1
Left speaker attenuates: 0dB
D5:D0 000000
X
X
X
B
0
1
0
0
Right speaker attenuates: 0dB
D5:D0 000000
X
X
X
B
0
1
0
1
Left headphone attenuates: 0dB
D5:D0 000000
X
X
X
B
0
1
1
0
Right headphone attenuates: 0dB
D5:D0 000000
X
X
X
B
0
1
1
1
TRUBASS punch level: 0
D5:D0 000000
X
X
X
B
1
0
0
0
X
X
X
B
1
0
0
1
X
X
X
B
1
0
1
0
DIALOG CLARITY level: 0
Sub-woofer: ON
Sub-woofer input: Output of multiplexer
Sub-woofer low-pass filter function: ON
Sub-woofer output phase: NORMAL
Sub-woofer LPF cutoff frequency: 60Hz
Sub-woofer attenuates: 0dB
D5:D0 000000
D7
1
D6
0
D5
1
D4
0
D3:D0 1100
D5:D0 000000
X
X
X
B
1
0
1
1
EQ band 1 / SRS PCT high-band level: 0dB
D4:D0
00000
X
X
X
B
1
1
0
0
EQ band 2 / SRS PCT mid-band level: 0dB
D4:D0
00000
X
X
X
B
1
1
0
1
EQ band 3 level: 0dB
D4:D0
00000
X
X
X
B
1
1
1
0
EQ band 4 level: 0dB
D4:D0
00000
X
X
X
B
1
1
1
1
EQ band 5 level: 0dB
D4:D0
00000
B = 0 non-incremental
B = 1 incremental
Revision 2.9
Page 23 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
17.
DATA BYTE SPECIFICATION
SPK, HP, SUB-WOOFER MUTE, INPUT VOLUME (SUB-ADDRESS “XXXB0000”)
D7 – SPEAKER MUTE on/off
D6 – HEADPHONE MUTE on/off
D5 – SUB-WOOFER MUTE on/off
D4:D0 – INPUT VOLUME CONTROL
LEFT & RIGHT SPEAKER OUTPUT MUTE
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
SPK MUTE
0
Speaker output ON
1
Speaker output MUTE
LEFT & RIGHT HEADPHONE OUTPUT MUTE
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
SPK MUTE
0
Headphone output ON
1
Headphone output MUTE
SUB-WOOFER OUTPUT MUTE
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
SUB MUTE
0
Sub-woofer output ON
1
Sub-woofer output MUTE
INPUT VOLUME
MSB
D7
D6
Revision 2.9
D5
LSB
INPUT VOLUME
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
+10dB
1
1
1
1
0
+9dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
0
1
1
0
+1dB
1
0
1
0
1
0dB
1
0
1
0
0
-1dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
0
0
0
0
-5dB
0
1
1
1
1
-6dB
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
-20dB
0
0
0
0
0
-21dB
Page 24 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
POWERSAVE on/off, MODE SELECT, INPUT SELECT (SUB-ADDRESS “XXXB0001”)
D7 – POWERSAVE on/off
D6:D3 – MODE SELECTION
D2:D0 – INPUT SOURCE SELECTION
POWERSAVE ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
POWERSAVE
0
OFF
1
ON
In Power-save mode, irrelevant components will be shut off and no power will be dissipated for those parts.
MODE
BLOCK(S) SHUT OFF
TruSurround XT
SRS 3D-MONO, PASSIVE MATRIX
SRS 3D
SRS 3D-MONO, PASSIVE MATRIX
LT/RT
SRS 3D-MONO
TRUBASS
SRS 3D-MONO, TRUSURROUND, PASSIVE MATRIX
3D MONO
TRUSURROUND, PASSIVE MATRIX
TRUBASS OFF
TRUBASS
TSXT BYPASS
SRS 3D-MONO, TRUSURROUND, PASSIVE MATRIX
SRS PCT / EQ OFF
SRS PCT / 5 BAND EQUALIZER
SUB-WOOFER OFF
SUB-WOOFER
Points to note for changing mode
Mute at output is needed to prevent click noise when changing from one mode to another mode. The timing of MCU must be
carefully noted. If it is under Power-save mode, the MCU should i) send commands to mute all the outputs, ii) turn off Power-save
mode, iii) change the mode, iv) turn on Power-save mode again, v) wait for about 10ms and restore the original mute status. Total 5
times of data transfer are needed.
AUDIO TECHNOLOGY SELECTION
MSB
D7
LSB
D2
D1
D0
MODE SELECT
D6
D5
D4
D3
0
0
0
0
TruSurround XT + SRS PCT
0
0
0
1
SRS-3D + SRS PCT
0
0
1
0
LT / RT + SRS PCT
0
0
1
1
TRUBASS + SRS PCT
0
1
0
*0
0
1
0
*1
0
1
1
0
1
1
1
0
1
3D-MONO + SRS PCT
X
POWERDOWN
0
0
TruSurround XT + 5 BAND EQ
0
0
1
SRS-3D + 5 BAND EQ
1
0
1
0
LT / RT + 5 BAND EQ
1
0
1
1
TRUBASS + 5 BAND EQ
1
1
0
*0
1
1
0
*1
1
1
1
1
1
1
3D-MONO + 5 BAND EQ
X
POWERDOWN
* D3 under 3D-MONO MODE is for input select. Refer to the part “INPUT CHANNEL SELECTION” for details.
Revision 2.9
Page 25 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
POWERSAVE on/off, MODE SELECT, INPUT SELECT (SUB-ADDRESS “XXXB0001”)
INPUT CHANNEL SELECTION (STEREO: SRS-3D MODE, LT / RT MODE, TRUBASS MODE)
MSB
LSB
D7
D6
D5
D4
D3
STEREO LEFT
STEREO RIGHT
0
CH1L
CH1R
1
0
CH2L
CH2R
1
0
0
CH3L
CH3R
1
1
0
CH4L
CH4R
0
0
1
CH5L
CH5R
0
1
1
CH6L
CH6R
1
0
1
CH7L
CH7R
1
1
1
-
-
D2
D1
D0
0
0
0
INPUT CHANNEL SELECTION (MULTI-CHANNEL: TruSurround XT MODE)
MSB
D7
LSB
FLEFTI
FRIGHTI
RLEFTI
0
CH1L
CH1R
CH2L
CH2R
CH3L
CH3R
CH4L
1
CH5L
CH5R
CH6L
CH6R
CH7L
CH7R
CH4R
D6
D5
D4
D3
D2
D1
D0
X
0
0
0
X
X
X
0
0
0
X
X
RRIGHTI CENTERIN RCENTERI
SUBIN
X000 - TruSurround XT MODE
INPUT CHANNEL SELECTION (MONO: 3D-MONO MODE)
MSB
D7
LSB
MONO
D6
D5
D4
D3
D2
D1
D0
X
1
0
0
0
0
0
CH1L
X
1
0
0
0
1
0
CH2L
X
1
0
0
1
0
0
CH3L
X
1
0
0
1
1
0
CH4L
X
1
0
0
0
0
1
CH5L
X
1
0
0
0
1
1
CH6L
X
1
0
0
1
0
1
CH7L
X
1
0
0
1
1
1
-
X
1
0
1
0
0
0
CH1R
X
1
0
1
0
1
0
CH2R
X
1
0
1
1
0
0
CH3R
X
1
0
1
1
1
0
CH4R
X
1
0
1
0
0
1
CH5R
X
1
0
1
0
1
1
CH6R
X
1
0
1
1
0
1
CH7R
X
1
0
1
1
1
1
-
X100, X101 - MONO MODE
Revision 2.9
D3 under 3D-MONO mode is for input channel selection
Page 26 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ZEROCROSS, TB on/off, TSXT BYPASS, EQ on/off, DC, HP, PL (SUB-ADDRESS “XXXB0010”)
D7 – ZEROCROSS on/off
D6 – TRUBASS ENHANCEMENT on/off
D5 – TSXT BYPASS (except TRUBASS) on/off
D4 – SRS PCT / 5-BAND EQ on/off
D3 – DIALOG CLARITY on/off
D2 – SRS HEADPHONE MODE
D1:D0 – PROLOGIC MODE SELECT
ZEROCROSS ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
ZEROCROSS
0
OFF
1
ON
TRUBASS ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
TRUBASS
0
OFF
1
ON
TRUBASS off will bypass the block “SRS TRUBASS” in block diagram and “SRS TRUBASS” will not drawn any current under
power-save mode. For TRUBASS mode, if TRUBASS off is selected, input signal will just be passed to “SRS PCT / 5-BAND EQ”.
TSXT BYPASS
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
TSXT
0
NORMAL
1
BYPASS
TSXT BYPASS will bypass three blocks in block diagram: “PASSIVE MATRIX”, “SRS 3D-MONO” and “SRS TRUSURROUND”. No
current will be drawn by “PASSIVE MATRIX”, “SRS 3D-MONO” and “SRS TRUSURROUND” under power-save mode when
TSXT BYPASS.
SRS PCT / 5-BAND EQUALIZER ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
PCT / EQ
0
OFF
1
ON
SRS PCT / 5-BAND EQUALIZER off will bypass the block “SRS PCT / 5-BAND EQUALZIER” in block diagram and “SRS PCT / 5BAND EQUALZIER” will not draw any current under power-save mode
SRS DIALOG CLARITY ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
DC
0
OFF
1
ON
DIALOG CLARITY is supported in the following 3 modes:
1. TruSurround XT – CENTER DIALOG CLARITY
2. LT / RT – CENTER DIALOG CLARITY
3. SRS-3D – FRONT DIALOG CLARITY
Revision 2.9
Page 27 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ZEROCROSS, TB on/off, TSXT BYPASS, EQ on/off, DC, HP, PL (SUB-ADDRESS “XXXB0010”)
SRS HEADPHONE MODE ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
HP
D0
0
OFF
1
ON
SRS HEADPHONE MODE is supported in the following 3 modes:
1. TruSurround XT
2. LT / RT
3. SRS-3D
PROLOGIC MODE
MSB
D7
LSB
D6
D5
D4
D3
D2
PL
D1
D0
0
0
6.1 MODE
0
1
5.1 MODE
1
0
PROLOGIC I MODE
1
1
PROLOGIC II MODE
PROLOGIC MODE selection
Different PROLOGIC MODE selection bits should be set and different rear input channels should be fed for different systems:
1.
2.
3.
4.
PROLOGIC I system
PROLOGIC II system
5.1 CHANNEL system
6.1 CHANNEL system
-
RCENTERI should be the only input since it is mono
RLEFTI and RRIGHTI should be used and no RCENTERI input
RCENTERI is not used, RLEFTI and RRIGHTI should be fed
RCENTERI, RLEFTI and RRIGHTI should be all used
PROLOGIC MODE selection is supported in TruSurround XT mode only.
SUB-ADDRESS “XXXB0010” - SUMMARY
MODE
TRUBASS
ENHANCE
ON/OFF
TSXT
BYPASS
ON/OFF
TruSurround XT
ü
ü
ü
ü
SRS 3D
ü
ü
ü
LT/RT
ü
ü
TRUBASS
ü
3D-MONO
ü
POWERDOWN
û
û
Revision 2.9
SRS PCT
PROLOGIC
SRS
/ 5-BAND EQ
MODE
HEADPHONE
ON/OFF
SELECTION
ON/OFF
DIALOG
CLARITY
ON/OFF
NO. OF INPUT
CHANNEL (S)
ü
ü
7×2
û
ü
ü
2×7
ü
û
ü
ü
2×7
û
ü
û
û
û
2×7
ü
ü
û
û
û
1 × 14
û
û
û
û
DON’T
CARE
Page 28 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
LEFT SPEAKER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0011”)
D5:D0 – LEFT SPEAKER OUTPUT CONTROL
MSB
D7
D6
LSB
LEFT SPEAKER OUTPUT ATTENUATION
D5
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
1
MUTE
1
1
1
1
1
0
-62dB
1
1
1
1
0
1
-61dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
-2dB
0
0
0
0
0
1
-1dB
0
0
0
0
0
0
0dB
RIGHT SPEAKER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0100”)
D5:D0 – RIGHT SPEAKER OUTPUT CONTROL
MSB
D7
D6
LSB
RIGHT SPEAKER OUTPUT ATTENUATION
D5
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
1
MUTE
1
1
1
1
1
0
-62dB
1
1
1
1
0
1
-61dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
-2dB
0
0
0
0
0
1
-1dB
0
0
0
0
0
0
0dB
LEFT HEADPHONE OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0101”)
D5:D0 – LEFT HEADPHONE OUTPUT CONTROL
MSB
D7
D6
Revision 2.9
LSB
LEFT HEADPHONE OUTPUT ATTENUATION
D5
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
1
MUTE
1
1
1
1
1
0
-62dB
1
1
1
1
0
1
-61dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
-2dB
0
0
0
0
0
1
-1dB
0
0
0
0
0
0
0dB
Page 29 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
RIGHT HEADPHONE OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB0110”)
D5:D0 – RIGHT HEADPHONE OUTPUT CONTROL
MSB
D7
D6
LSB
RIGHT HEADPHONE OUTPUT ATTENUATION
D5
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
1
MUTE
1
1
1
1
1
0
-62dB
1
1
1
1
0
1
-61dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
-2dB
0
0
0
0
0
1
-1dB
0
0
0
0
0
0
0dB
TRUBASS PUNCH LEVEL (SUB-ADDRESS “XXXB0111”)
D5:D0 – TRUBASS PUNCH LEVEL CONTROL
MSB
D7
D6
LSB
TRUBASS PUNCH LEVEL
D5
D4
D3
D2
D1
D0
LINEAR
1
1
1
1
1
1
63
1
1
1
1
1
0
62
1
1
1
1
0
1
61
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
2
0
0
0
0
0
1
1
0
0
0
0
0
0
0
DIALOG CLARITY LEVEL (SUB-ADDRESS “XXXB1000”)
D5:D0 – DIALOG CLARITY LEVEL CONTROL
MSB
D7
D6
Revision 2.9
LSB
DIALOG CLARITY LEVEL
D5
D4
D3
D2
D1
D0
LINEAR
1
1
1
1
1
1
63
1
1
1
1
1
0
62
1
1
1
1
0
1
61
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
2
0
0
0
0
0
1
1
0
0
0
0
0
0
0
Page 30 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SUB on/off, SUB INPUT, LPF on/off, PHASE, LPF SETTING (SUB-ADDRESS “XXXB1001”)
D7 – SUB-WOOFER on/off
D6 – SUB-WOOFER INPUT SELECT
D5 – SUB-WOOFER LPF on/off
D4 – SUB-WOOFER OUTPUT PHASE INVERT
D3:D0 – SUB-WOOFER LPF CUTOFF FREQUENCY
SUB-WOOFER ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
SUB
D0
0
OFF
1
ON
When SUB-WOOFER is off, no signal will be passed to the “SUB-WOOFER” block and no current will be drawn for “SUBWOOFER” at power-save mode.
SIGNAL INPUT FOR SUB-WOOFER
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
SUB INPUT
0
Output of MULTIPLEXER
1
Output of SRS TRUBASS
Using “SRS PCT” or “5-BAND EQ” is not cared for SUB-WOOFER INPUT
SUB-WOOFER LOW-PASS FILTER ON/OFF
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
LPF
D0
0
OFF
1
ON
When SUB-WOOFER LOW-PASS FILTER is off, SUB-WOOFER output will not be low passed.
SUB-WOOFER OUTPUT PHASE 180o INVERT ON/OFF
MSB
D7
LSB
D6
Revision 2.9
D5
D4
D3
D2
D1
D0
PHASE
0
NORMAL
1
180 INVERT
o
Page 31 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SUB on/off, SUB INPUT, LPF on/off, PHASE, LPF SETTING (SUB-ADDRESS “XXXB1001”)
SUB-WOOFER LOW-PASS FILTER CUTOFF FREQUENCY SETTING
MSB
D7
LSB
D6
D5
D4
LPF SETTING
D3
D2
D1
D0
1
1
1
1
30Hz
1
1
1
0
40Hz
1
1
0
1
50Hz
1
1
0
0
60Hz
1
0
1
1
70Hz
1
0
1
0
80Hz
1
0
0
1
90Hz
1
0
0
0
100Hz
0
1
1
1
110Hz
0
1
1
0
120Hz
0
1
0
1
130Hz
0
1
0
0
140Hz
0
0
1
1
150Hz
0
0
1
0
160Hz
0
0
0
1
170Hz
0
0
0
0
180Hz
BLOCK DIAGRAM FOR SUB-WOOFER
INPUT
MULTIPLEXER
&
VOLUME
D4
PHASE
INVERT
SRS
TRUBASS
D6
SUB-INPUT
SELECT
D3:D0
LPF SETTING
D5
LPF on/off
D7
SUBWOOFER
on/off
SMAXO
LPF
SUB-WOOFER BLOCK
Revision 2.9
Page 32 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
SUB-WOOFER OUTPUT ATTENUATOR (SUB-ADDRESS “XXXB1010”)
D5:D0 – SUB-WOOFER OUTPUT CONTROL
MSB
D7
D6
LSB
SUB-WOOFER OUTPUT ATTENUATION
D5
D4
D3
D2
D1
D0
1dB STEPS
1
1
1
1
1
1
MUTE
1
1
1
1
1
0
-62dB
1
1
1
1
0
1
-61dB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
0
-2dB
0
0
0
0
0
1
-1dB
0
0
0
0
0
0
0dB
EQ BAND 1 LEVEL / SRS PCT HIGH-BAND LEVEL (SUB-ADDRESS “XXXB1011”)
D4:D0 – EQ BAND1 / SRS PCT HIGH-BAND CONTROL
MSB
D7
D6
D5
LSB
EQ BAND 1
SRS PCT HIGH-BAND
D4
D3
D2
D1
D0
1dB STEPS
1dB STEPS
0
1
1
1
1
+15dB
+15dB
•
•
•
•
•
•
•
•
•
•
•
•
-
0
0
0
0
1
+1dB
+1dB
0
0
0
0
0
0dB
0dB
1
0
0
0
0
-
-
1
0
0
0
1
-1dB
-
•
•
•
•
•
•
•
•
•
•
•
•
-
1
1
1
1
1
-15dB
-
EQ BAND 2 LEVEL / SRS PCT MID-BAND LEVEL (SUB-ADDRESS “XXXB1100”)
D4:D0 – EQ BAND2 / SRS PCT MID-BAND CONTROL
MSB
D7
D6
Revision 2.9
D5
LSB
EQ BAND 1
SRS PCT MID-BAND
D4
D3
D2
D1
D0
1dB STEPS
1dB STEPS
0
1
1
1
1
+15dB
+15dB
•
•
•
•
•
•
•
•
•
•
•
•
-
0
0
0
0
1
+1dB
+1dB
0
0
0
0
0
0dB
0dB
1
0
0
0
0
-
-
1
0
0
0
1
-1dB
-
•
•
•
•
•
•
•
•
•
•
•
•
-
1
1
1
1
1
-15dB
-
Page 33 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
EQ BAND 3 LEVEL (SUB-ADDRESS “XXXB1101”)
D4:D0 – EQ BAND3 CONTROL
MSB
D7
D6
D5
LSB
EQ BAND 3
D4
D3
D2
D1
D0
1dB STEPS
0
1
1
1
1
+15dB
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
+1dB
0
0
0
0
0
0dB
1
0
0
0
0
0dB
1
0
0
0
1
-1dB
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
-15dB
LSB
EQ BAND 4
EQ BAND 4 LEVEL (SUB-ADDRESS “XXXB1110”)
D4:D0 – EQ BAND4 CONTROL
MSB
D7
D6
D5
D4
D3
D2
D1
D0
1dB STEPS
0
1
1
1
1
+15dB
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
+1dB
0
0
0
0
0
0dB
1
0
0
0
0
0dB
1
0
0
0
1
-1dB
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
-15dB
LSB
EQ BAND 5
EQ BAND 5 LEVEL (SUB-ADDRESS “XXXB1111”)
D4:D0 – EQ BAND5 CONTROL
MSB
D7
D6
Revision 2.9
D5
D4
D3
D2
D1
D0
1dB STEPS
0
1
1
1
1
+15dB
•
•
•
•
•
•
•
•
•
•
•
•
0
0
0
0
1
+1dB
0
0
0
0
0
0dB
1
0
0
0
0
-
1
0
0
0
1
-1dB
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
-15dB
Page 34 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
2.
PACKAGE INFORMATION ( PQFP-100)
Revision 2.9
Page 35 of 36
June 9, 2005
AP8306
SRS TruSurround XT Audio Processor
ValenceTech Limited
Unit 2001, 20/F., APEC Plaza,
49 Hoi Yuen Road, Kwun Tong, Hong Kong
Tel: (852) 2797 3288
Fax: (852) 2776 7770
Email: inquiry@valencetech.com
Website: http://www.valencetech.com
is a brand name of ValenceTech Limited.
The SRS TruSurround XT Technology rights in the AP8306 are owned by SRS Labs, Inc. a United States Corporation
and licensed to ValenceTech Ltd. SRS is protected under US and foreign patents issued and/or pending. The symbol
is a trademark of SRS Labs, Inc. in the United State and selected foreign countries. Neither the purchase of the
AP8306, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized
recordings made with any SRS technology. SRS Labs requires all set makers to comply with all rules and regulations
as outlined in the SRS Trademark Usage Manual separately provided.
IMPORTANT NOTICE
“Preliminary” product information describes products that are in production, but for which full characterization data is not yet available. ValenceTech Ltd. and its affiliates (“Valence”) believe that the
information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied).
Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the
terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by
Valence for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document
is the property of Valence and by furnishing this information, Valence grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other
intellectual property rights. Valence owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your
organization with respect to Valence integrated circuits or other products of Valence. This consent does not extend to other copying such as copying for general distribution, advertising or
promotional purposes, or for creating any work for resale. An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies
described in this material and controlled under the “Foreign Exchange and Foreign Trade Law” is to be exported or taken out of Japan. An export license and /or quota needs to be obtained from the
competent authorities of the Chinese Government if any of the products or technologies described in this material is subject to the PRC Foreign Trade Law and is to be exported or taken out of the
PRC. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR
ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). VALENCE PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY
APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT
SYSTEMS OR COMPONENTS AND PERSONAL OR AUTOMOTIVE SAFETY OR SECURITY DEVICES). INCLUSION OF VALENCE PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD
TO BE FULLY AT THE CUSTOMER’S RISK AND VALENCE DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY VALENCE PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR
CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF VALENCE PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY VALENCE,
ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT
FROM OR ARISE IN CONNECTION WITH THESE USES.
Purchasers of ValenceTech products must enter into a license agreement directly with SRS Labs if the royalty for the use of the SRS technologies is not included in the ValenceTech purchase price.
Neither the purchase of a ValenceTech product nor the license of SRS products conveys the right to sell commercialized recordings made with any ValenceTech or SRS technologies.
ValenceTech, SRS Labs, SRS, and the SRS Labs logo designs are trademarks of SRS Labs, Inc. All other brand and product names in this document may be trademarks or service marks of their
respective owners.
Revision 2.9
Page 36 of 36
June 9, 2005