TI TLV320AIC3254IRHBT

TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
1 Introduction
1.1 Features
1.2
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Stereo Audio DAC with 100dB SNR
4.1mW Stereo 48ksps DAC Playback
Stereo Audio ADC with 93dB SNR
6.1mW Stereo 48ksps ADC Record
PowerTune™
Extensive Signal Processing Options
Embedded miniDSP
Six Single-Ended or 3 Fully-Differential Analog
Inputs
Stereo Analog and Digital Microphone Inputs
Stereo Headphone Outputs
Stereo Line Outputs
Very Low-Noise PGA
Low Power Analog Bypass Mode
Programmable Microphone Bias
Programmable PLL
Integrated LDO
5 mm x 5 mm 32-pin QFN Package
Applications
Portable Navigation Devices (PND)
Portable Media Player (PMP)
Mobile Handsets
Communication
Portable Computing
Acoustic Echo Cancellation (AEC)
Active Noise Cancellation (ANC)
Advanced DSP algorithms
1.3 Description
The TLV320AIC3254 (sometimes referred to as the
AIC3254) is a flexible, low-power, low-voltage stereo
audio codec with programmable inputs and outputs,
PowerTune capabilities, fully programmable miniDSP,
fixed predefined and parameterizable signal
processing blocks, integrated PLL, integrated LDOs
and flexible digital interfaces.
IN1_L
IN2_L
IN3_L
0…+47.5 dB
+
Left
ADC
tpl
+
´
AGC
DRC
ADC
Signal
Proc.
DAC
Signal
Proc.
Vol . Ctrl
-72...0dB
Left
DAC
´
-6...+29dB
HPL
+
1dB steps
Gain Adj.
0.5 dB
steps
-6...+29dB
-30...0 dB
LOL
+
Data
Interface
miniDSP
1dB steps
miniDSP
-6...+29dB
-30...0 dB
LOR
+
1dB steps
0…
+47.5 dB
+
Gain Adj.
Right
ADC
IN3_R
+
tpr
´
0.5 dB steps
IN2_R
ADC
Signal
Proc.
DAC
Signal
Proc.
AGC
DRC
-6...+29dB
Right
DAC
´
Vol . Ctrl
HPR
+
1dB steps
-72...0dB
IN1_R
SPI_Select
SPI / I2C
Control Block
Reset
Digital Interrupt Secondary
Mic.
Ctrl
I2S IF
PLL
Primary
I2S Interface
HPVdd
MicBias
Mic
Bias
ALDO
Ref
Ref
DLDO
Supplies
Pin Muxing/ Clock Routing
BCLK
WCLK
DIN
DOUT
GPIO
MCLK
SCLK
MISO
SDA/MOSI
SCL/SSZ
IOVss
DVss
AVss
IOVdd
DVdd
AVdd
LDO Select
LDO in
Figure 1-1. Simplified Block Diagram
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this document.
PowerTune is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2008, Texas Instruments Incorporated
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
1.4
www.ti.com
Detailed Description
The TLV320AIC3254 features two fully programmable miniDSP cores that support application-specific
algorithms in the record and/or the playback path of the device. The miniDSP cores are fully software
controlled. Target algorithms, like active noise cancellation, acoustic echo cancellation or advanced DSP
filtering are loaded into the device after power-up.
Extensive Register based control of power, input/output channel configuration, gains, effects,
pin-multiplexing and clocks is included, allowing the device to be precisely targeted to its application.
Combined with the advanced PowerTune technology, the device can cover operations from 8 kHz mono
voice playback to audio stereo 192kHz DAC playback, making it ideal for portable battery-powered audio
and telephony applications.
The record path of the TLV320AIC3254 covers operations from 8kHz mono to 192kHz stereo recording,
and contains programmable input channel configurations covering single-ended and differential setups, as
well as floating or mixing input signals. It also includes a digitally-controlled stereo microphone preamplifier
and integrated microphone bias. Digital signal processing blocks can remove audible noise that may be
introduced by mechanical coupling, e.g. optical zooming in a digital camera.
The playback path offers signal-processing blocks for filtering and effects, and supports flexible mixing of
DAC and analog input signals as well as programmable volume controls. The playback path contains two
high-power output drivers as well as two fully-differential outputs. The high-power outputs can be
configured in multiple ways, including stereo, mono BTL and Class D.
The integrated PowerTune technology allows the device to be tuned to just the right power-performance
trade-off. Mobile applications frequently have multiple use cases requiring very low power operation while
being used in a mobile environment. When used in a docked environment power consumption typically is
less of a concern, while minimizing noise is important. With PowerTune, the TLV320AIC3254 addresses
both cases.
The voltage supply range for the TLV320AIC3254 for analog is 1.5V–1.95V, and for digital it is
1.26V–1.95V. To ease system-level design, LDOs are integrated to generate the appropriate analog or
digital supply from input voltages ranging from 1.8V to 3.6V. Digital I/O voltages are supported in the
range of 1.1V–3.6V.
The required internal clock of the TLV320AIC3254 can be derived from multiple sources, including the
MCLK pin, the BCLK pin, the GPIO pin or the output of the internal PLL, where the input to the PLL again
can be derived from the MCLK pin, the BCLK or GPIO pins. Although using the PLL ensures the
availability of a suitable clock signal, it is not recommended for the lowest power settings. The PLL is
highly programmable and can accept available input clocks in the range of 512kHz to 50MHz.
The device is available in the 5-mm × 5-mm, 32-pin QFN package.
2
Introduction
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in
conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
2 Package and Signal Descriptions
2.1 Packaging/Ordering Information
PRODUCT
PACKAGE
PACKAGE
DESIGNATOR
OPERATING
TEMPERATURE
RANGE
TLV320AIC3254
QFN
RHB
–40°C to 85°C
ORDERING
NUMBER
TRANSPORT MEDIA,
QUANTITY
TLV320AIC3254IRHBT
Tape and Reel, 250
TLV320AIC3254IRHBR
Tape and Reel, 3000
8
1
GPIO/MFP5 (32)
SCLK/MFP3
IOVSS
OVIDD
DIN/MFP1
DOUT/MFP2
WCLK
BCLK
MCLK (1)
2.2 Pin Assignments
32
9
SCL/SSZ
SDA/MOSI
RESET
LDO_SELECT
MISO/MFP4
DVDD
SPI_SELECT
DVSS
IN1_L
HPR
IN1_R
LDOIN
IN2_L
HPL
25
16
24
IN2_R
17
AVSS
MICBIAS
REF
IN3_L
IN3_R
LOR
LOL
AVDD
Figure 2-1. QFN (RHB) Package, Bottom View
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Package and Signal Descriptions
3
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Table 2-1. TERMINAL FUNCTIONS
TERMINAL
NAME
TYPE
1
MCLK
I
DESCRIPTION
2
BCLK
IO
Audio serial data bus (primary) bit clock
3
WCLK
IO
Audio serial data bus (primary) word clock
4
DIN
I
Master Clock Input
Primary function
Audio serial data bus data input
MFP1
Secondary function
Audio serial data bus (secondary) bit clock input
Audio serial data bus (secondary) word clock input
Digital Microphone Input
Clock Input
General Purpose Input
5
DOUT
O
Primary
Audio serial data bus data output
MFP2
Secondary
General Purpose Output
Clock Output
INT1 Output
INT2 Output
Audio serial data bus (secondary) bit clock output
Audio serial data bus (secondary) word clock output
6
IOVDD
Power
I/O voltage supply 1.1V – 3.6V
7
IOVSS
Ground
I/O ground supply
8
SCLK
I
Primary (SPI_Select = 1)
SPI serial clock
MFP3
Secondary: (SPI_Select = 0)
Headset-detect input
Digital microphone input
Audio serial data bus (secondary)
Audio serial data bus (secondary)
Audio serial data bus (secondary)
Audio serial data bus (secondary)
General Purpose Input
bit clock input
DAC/common word clock input
ADC word clock input
data input
9
SCL/
SSZ
I
I2C interface serial clock (SPI_Select = 0)
SPI interface mode chip-select signal (SPI_Select = 1)
10
SDA/ MOSI
I
I2C interface mode serial data input (SPI_Select = 0)
SPI interface mode serial data input (SPI_Select = 1)
11
MISO
O
Primary (SPI_Select = 1)
Serial data output
MFP4
Secondary (SPI_Select = 0)
General purpose output
CLKOUT output
INT1 output
INT2 output
Audio serial data bus (primary) ADC word clock output
Digital microphone clock output
Audio serial data bus (secondary) data output
Audio serial data bus (secondary) bit clock output
Audio serial data bus (secondary) word clock output
12
4
SPI_ SELECT
Package and Signal Descriptions
I
Control mode select pin ( 1 = SPI, 0 = I2C )
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Table 2-1. TERMINAL FUNCTIONS (continued)
TERMINAL
NAME
TYPE
13
IN1_L
I
Multifunction Analog Input,
or Single-ended configuration: MIC 1 or Line 1 left
or Differential configuration: MIC or Line right, negative
14
IN1_R
I
Multifunction Analog Input,
or Single-ended configuration: MIC 1 or Line 1 right
or Differential configuration: MIC or Line right, positive
15
IN2_L
I
Multifunction Analog Input,
or Single-ended configuration: MIC 2 or Line 2 right
or Differential configuration: MIC or Line left, positive
16
IN2_R
I
Multifunction Analog Input,
or Single-ended configuration: MIC 2 or Line 2 right
or Differential configuration: MIC or Line left, negative
17
AVss
Ground
18
REF
O
Reference voltage output for filtering
19
MICBIAS
O
Microphone bias voltage output
20
IN3_L
I
Multifunction Analog Input,
or Single-ended configuration: MIC3 or Line 3 left,
or Differential configuration: MIC or Line left, positive,
or Differential configuration: MIC or Line right, negative
21
IN3_R
I
Multifunction Analog Input,
or Single-ended configuration: MIC3 or Line 3 right,
or Differential configuration: MIC or Line left, negative,
or Differential configuration: MIC or Line right, positive
22
LOL
O
Left line output
Right line output
23
LOR
O
24
AVdd
Power
DESCRIPTION
Analog ground supply
Analog voltage supply 1.5V–1.95V
Input when A-LDO disabled,
Filtering output when A-LDO enabled
25
HPL
O
26
LDOIN/ HPVDD
Power
Left high power output driver
27
HPR
O
28
DVss
Ground
Digital Ground and Chip-substrate
29
DVdd
Power
If LDO_SELECT Pin = 0 (D-LDO disabled)
LDO Input supply and Headphone Power supply 1.9V– 3.6V
Right high power output driver
Digital voltage supply 1.26V – 1.95V
If LDO_SELECT Pin = 1 (D-LDO enabled)
Digital voltage supply filtering output
30
LDO_ SELECT
I
connect to DVss.
31
RESET
I
Reset (active low)
32
GPIO
I
Primary
General Purpose digital IO
MFP5
Secondary
CLKOUT Output
INT1 Output
INT2 Output
Audio serial data bus ADC word clock output
Audio serial data bus (secondary) bit clock output
Audio serial data bus (secondary) word clock output
Digital microphone clock output
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Package and Signal Descriptions
5
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
3 Electrical Specifications
3.1
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
VALUE
UNIT
AVdd to AVss
–0.3 to 2.2
V
DVdd to DVss
–0.3 to 2.2
V
IOVDD to IOVSS
–0.3 to 3.9
V
LDOIN to AVss
–0.3 to 3.9
V
Digital Input voltage to ground
–0.3 to IOVDD + 0.3
V
Analog input voltage to ground
–0.3 to AVdd + 0.3
V
Operating temperature range
–40 to 85
°C
Storage temperature range
–55 to 125
°C
105
°C
Junction temperature (TJ Max)
(TJ Max – TA)/ θJA
W
θJA Thermal impedance
35
C/W
Infrared (15 sec)
260
°C
QFN package (RHB)
QFN package (RHB)
Power dissipation (with thermal pad soldered to board)
Lead Temperature
(1)
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating
conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
3.2
RECOMMENDED OPERATING CONDITIONS
MIN
LDOIN
Power Supply Voltage Range
Referenced to AVss (1)
AVdd
1.5
Referenced to IOVSS (1)
IOVDD
DVdd
(2)
Referenced to DVss
PLL Input Frequency
MCLK
Master Clock Frequency
SCL
SCL Clock Frequency
LOL, LOR
Stereo line output load resistance
HPL, HPR
Stereo headphone output load resistance
Headphone output load resistance
CLout
Digital output load capacitance
TOPR
Operating Temperature Range
(1)
(2)
6
(1)
NOM
1.9
1.8
1.1
1.26
1.8
MAX
UNIT
3.6
V
1.95
V
3.6
V
1.95
V
Clock divider uses fractional divide
(D > 0), P=1, DVdd ≥ 1.65V (Refer to
Table 5-23)
10
20
MHz
Clock divider uses integer divide
(D = 0), P=1, DVdd ≥ 1.65V (Refer to
Table 5-23)
0.512
20
MHz
MCLK; Master Clock Frequency;
DVdd ≥ 1.65V
50
MHz
MCLK; Master Clock Frequency;
DVdd ≥ 1.26V
25
400
kHz
0.6
10
kΩ
Single-ended configuration
14.4
16
Ω
Differential configuration
24.4
32
Ω
10
pF
–40
85
°C
All grounds on board are tied together, so they should not differ in voltage by more than 0.2V max, for any combination of ground
signals.
At DVdd values lower than 1.65V, the PLL does not function. Please see Table 5-23 for details on maximum clock frequencies.
Electrical Specifications
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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3.3
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
ELECTRICAL CHARACTERISTICS
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AUDIO ADC (1) (2)
Input signal level (0dB)
Single-ended, CM = 0.9V
Device Setup
1kHz sine wave input
Single-ended Configuration
IN1R to Right ADC and IN1L to Left ADC,
Rin = 20K, fs = 48kHz,
AOSR = 128, MCLK = 256*fs,
PLL Disabled; AGC = OFF,
Channel Gain = 0dB,
Processing Block = PRB_R1,
Power Tune = PTM_R4
Inputs ac-shorted to ground
SNR
Signal-to-noise ratio, A-weighted (1)
DR
Dynamic range A-weighted (1)
THD+N
(2)
(2)
Total Harmonic Distortion plus Noise
IN2R, IN3R routed to Right ADC and ac-shorted to
ground
IN2L, IN3L routed to Left ADC and ac-shorted to
ground
0.5
80
VRMS
93
93
–60dB full-scale, 1-kHz input signal
92
–3 dB full-scale, 1-kHz input signal
–85
IN2R,IN3R routed to Right ADC
IN2L, IN3L routed to Left ADC
–3dB full-scale, 1-kHz input signal
–85
dB
dB
–70
dB
AUDIO ADC
SNR
Input signal level (0dB)
Single-ended, CM=0.75V, AVdd = 1.5V
Device Setup
1kHz sine wave input
Single-ended Configuration
IN1R, IN2R, IN3R routed to Right ADC
IN1L, IN2L, IN3L routed to Left ADC
Rin = 20K, fs = 48kHz,
AOSR=128, MCLK = 256* fs,
PLL Disabled, AGC = OFF,
Channel Gain = 0dB,
Processing Block = PRB_R1
Power Tune = PTM_R4
Signal-to-noise ratio, A-weighted
(1) (2)
(1) (2)
DR
Dynamic range A-weighted
THD+N
Total Harmonic Distortion plus Noise
0.375
VRMS
Inputs ac-shorted to ground
91
dB
–60dB full-scale, 1-kHz input signal
90
dB
–3dB full-scale, 1-kHz input signal
–80
dB
10
mV
2
µVRMS
AUDIO ADC
ICN
(1)
(2)
Input signal level (0dB)
Differential Input, CM=0.9V
Device Setup
1kHz sine wave input
Differential configuration
IN1L and IN1R routed to Right ADC
IN2L and IN2R routed to Left ADC
Rin =10K, fs =48kHz, AOSR=128
MCLK = 256* fs PLL Disabled
AGC = OFF, Channel Gain=40dB Processing Block
= PRB_R1,
Power Tune = PTM_R4
Idle-Channel Noise, A-weighted (1)
(2)
Inputs ac-shorted to ground, input referred noise
Ratio of output level with 1-kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a
20-Hz to 20-kHz bandwidth using an audio analyzer.
All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values
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Electrical Specifications
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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ELECTRICAL CHARACTERISTICS (continued)
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AUDIO ADC
Gain Error
1kHz sine wave input
Single-ended configuration
Rin = 20K fs = 48kHz, AOSR=128,
MCLK = 256* fs, PLL Disabled
AGC = OFF, Channel Gain=0dB
Processing Block = PRB_R1,
Power Tune = PTM_R4, CM=0.9V
–0.05
dB
108
dB
Input Channel Separation
1kHz sine wave input at -3dBFS
Single-ended configuration
IN1L routed to Left ADC
IN1R routed to Right ADC, Rin = 20K
AGC = OFF, AOSR = 128,
Channel Gain=0dB, CM=0.9V
1kHz sine wave input at –3dBFS on IN2L, IN2L
internally not routed.
IN1L routed to Left ADC
ac-coupled to ground
115
dB
Input Pin Crosstalk
55
dB
1kHz sine wave input at –3dBFS on IN2R,
IN2R internally not routed.
IN1R routed to Right ADC
ac-coupled to ground
Single-ended configuration Rin = 20K,
AOSR=128 Channel, Gain=0dB, CM=0.9V
PSRR
217Hz, 100mVpp signal on AVdd,
Single-ended configuration, Rin=20K,
Channel Gain=0dB; CM=0.9V
Single-Ended, Rin = 10K, PGA gain set to 0dB
0
dB
47.5
dB
–6
dB
Single-Ended, Rin = 20K, PGA gain set to 47.5dB
41.5
dB
Single-Ended, Rin = 40K, PGA gain set to 0dB
–12
dB
Single-Ended, Rin = 40K, PGA gain set to 47.5dB
35.5
dB
0.5
dB
Single-Ended, Rin = 10K, PGA gain set to 47.5dB
ADC programmable gain amplifier gain
ADC programmable gain amplifier step size
8
Electrical Specifications
Single-Ended, Rin = 20K, PGA gain set to 0dB
1-kHz tone
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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ELECTRICAL CHARACTERISTICS (continued)
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG BYPASS TO HEADPHONE AMPLIFIER, DIRECT MODE
Device Setup
Load = 16Ω (single-ended), 50pF;
Input and Output CM=0.9V;
Headphone Output on LDOIN Supply;
IN1L routed to HPL and IN1R routed to HPR;
Channel Gain=0dB
Gain Error
THD
–0.8
Noise, A-weighted (1)
Idle Channel, IN1L and IN1R ac-shorted to ground
Total Harmonic Distortion
446mVrms, 1-kHz input signal
3
dB
µVRMS
–89
dB
ANALOG BYPASS TO LINE-OUT AMPLIFIER, PGA MODE
Device Setup
Load = 10KOhm (single-ended), 56pF;
Input and Output CM=0.9V;
LINE Output on LDOIN Supply;
IN1L routed to ADCPGA_L and IN1R routed to
ADCPGA_R; Rin = 20k
ADCPGA_L routed to LOL and ADCPGA_R routed
to LOR; Channel Gain = 0dB
Gain Error
0.6
Idle Channel,
IN1L and IN1R ac-shorted to ground
Noise, A-weighted (1)
Channel Gain=40dB,
Input Signal (0dB) = 5mVrms
Inputs ac-shorted to ground, Input Referred
dB
7
µVRMS
3.4
µVRMS
1.25
V
1.7
V
MICROPHONE BIAS
Bias voltage
Bias voltage CM=0.9V, LDOin = 3.3V
Micbias Mode 0, Connect to AVdd or LDOin
Micbias Mode 1, Connect to LDOin
Micbias Mode 2, Connect to LDOin
2.5
V
Micbias Mode 3, Connect to AVdd
AVdd
V
Micbias Mode 3, Connect to LDOin
LDOin
V
Micbias Mode 0, Connect to AVdd or LDOin
1.04
V
Micbias Mode 1, Connect to AVdd or LDOin
1.425
V
Micbias Mode 2, Connect to LDOin
2.075
V
Micbias Mode 3, Connect to AVdd
AVdd
V
Micbias Mode 3, Connect to LDOin
LDOin
V
CM=0.75V, LDOin = 3.3V
Output Noise
CM=0.9V, Micbias Mode 2, A-weighted, 20Hz to
20kHz bandwidth,
Current load = 0mA.
Current Sourcing
Micbias Mode 2, Connect to LDOin
Inline Resistance
(1)
10
µVRMS
3
Micbias Mode 3, Connect to AVdd
140
Micbias Mode 3, Connect to LDOin
87
mA
Ω
All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values
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Electrical Specifications
9
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
0.5
VRMS
87
100
dB
–60dB 1kHz input full-scale signal, Word length=20
bits
100
dB
AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT
Load = 10 kΩ (single-ended), 56pF
Line Output on AVdd Supply
Input & Output CM=0.9V
DOSR = 128, MCLK=256* fs,
Channel Gain = 0dB, word length = 16 bits,
Processing Block = PRB_P1,
Power Tune = PTM_P3
Device Setup
Full scale output voltage (0dB)
SNR
Signal-to-noise ratio A-weighted (1)
(2)
DR
Dynamic range, A-weighted
THD+N
Total Harmonic Distortion plus Noise
–3dB full-scale, 1-kHz input signal
–83
DAC Gain Error
0 dB, 1kHz input full scale signal
0.3
dB
DAC Mute Attenuation
Mute
119
dB
DAC channel separation
–1 dB, 1kHz signal, between left and right HP out
113
dB
100mVpp, 1kHz signal applied to AVdd
73
dB
100mVpp, 217Hz signal applied to AVdd
77
dB
(1) (2)
DAC PSRR
All zeros fed to DAC input
–70
dB
AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT
Load = 10 kΩ (single-ended), 56pF
Line Output on AVdd Supply
Input & Output CM=0.75V; AVdd=1.5V
DOSR = 128
MCLK=256* fs
Channel Gain = –2dB
word length = 20-bits
Processing Block = PRB_P1
Power Tune = PTM_P4
Device Setup
Full scale output voltage (0dB)
0.375
(1) (2)
SNR
Signal-to-noise ratio, A-weighted
DR
Dynamic range, A-weighted
THD+N
Total Harmonic Distortion plus Noise
(1) (2)
VRMS
All zeros fed to DAC input
99
dB
–60dB 1 kHz input full-scale signal
97
dB
–1 dB full-scale, 1-kHz input signal
–85
dB
AUDIO DAC – STEREO SINGLE-ENDED HEADPHONE OUTPUT
Load = 16Ω (single-ended), 50pF
Headphone Output on AVdd Supply,
Input & Output CM=0.9V, DOSR = 128,
MCLK=256* fs, Channel Gain=0dB
word length = 16 bits;
Processing Block = PRB_P1
Power Tune = PTM_P3
Device Setup
Full scale output voltage (0dB)
0.5
VRMS
dB
99
dB
Signal-to-noise ratio, A-weighted (1)
DR
Dynamic range, A-weighted
THD+N
Total Harmonic Distortion plus Noise
–3dB full-scale, 1-kHz input signal
–83
DAC Gain Error
0dB, 1kHz input full scale signal
–0.3
dB
DAC Mute Attenuation
Mute
122
dB
DAC channel separation
–1dB, 1kHz signal, between left and right HP out
110
dB
100mVpp, 1kHz signal applied to AVdd
73
dB
100mVpp, 217Hz signal applied to AVdd
78
dB
DAC PSRR
(1)
(2)
10
(2)
100
SNR
(1) (2)
All zeros fed to DAC input
–60dB 1kHz input full-scale signal, Word Length =
20 bits, Power Tune = PTM_P4
87
–70
dB
Ratio of output level with 1-kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a
20-Hz to 20-kHz bandwidth using an audio analyzer.
All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values
Electrical Specifications
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
ELECTRICAL CHARACTERISTICS (continued)
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
Power Delivered
MIN
TYP
RL=16Ω, Output Stage on AVdd = 1.8V
THDN < 1%, Input CM=0.9V,
Output CM=0.9V
15
RL=16 Ω Output Stage on LDOIN = 3.3V,
THDN < 1% Input CM=0.9V,
Output CM=1.65V
64
MAX
UNIT
mW
AUDIO DAC – STEREO SINGLE-ENDED HEADPHONE OUTPUT
Load = 16Ω (single-ended), 50pF,
Headphone Output on AVdd Supply,
Input & Output CM=0.75V; AVdd=1.5V,
DOSR = 128, MCLK=256* fs,
Channel Gain = –2dB, word length=20-bits;
Processing Block = PRB_P1,
Power Tune = PTM_P4
Device Setup
Full scale output voltage (0dB)
0.375
SNR
Signal-to-noise ratio, A-weighted (1)
(2)
DR
Dynamic range, A-weighted
THD+N
Total Harmonic Distortion plus Noise
(1) (2)
VRMS
All zeros fed to DAC input
99
dB
-60dB 1 kHz input full-scale signal
98
dB
–1dB full-scale, 1-kHz input signal
–83
dB
1778
mVRMS
AUDIO DAC – MONO DIFFERENTIAL HEADPHONE OUTPUT
Load = 32 Ω (differential), 50pF,
Headphone Output on LDOIN Supply
Input CM = 0.75V, Output CM=1.5V,
AVdd=1.8V, LDOIN=3.0V, DOSR = 128
MCLK=256* fs, Channel (headphone driver) Gain =
5dB for full scale output signal,
word length=16-bits,
Processing Block = PRB_P1,
Power Tune = PTM_P3
Device Setup
Full scale output voltage (0dB)
SNR
Signal-to-noise ratio, A-weighted (1)
DR
Dynamic range, A-weighted
THD
Total Harmonic Distortion
(2)
All zeros fed to DAC input
98
dB
–60dB 1kHz input full-scale signal
96
dB
–3dB full-scale, 1-kHz input signal
–82
dB
RL=32Ω, Output Stage on LDOIN = 3.3V,
THDN < 1%, Input CM=0.9V,
Output CM=1.65V
136
mW
RL=32Ω Output Stage on LDOIN = 3.0V,
THDN < 1% Input CM=0.9V,
Output CM=1.5V
114
mW
LDOMode = 1, LDOin > 1.95V
1.67
LDOMode = 0, LDOin > 2.0V
1.72
LDOMode = 2, LDOin > 2.05V
1.77
±2
%
Load Regulation
Load current range 0 to 50mA
15
mV
Line Regulation
Input Supply Range 1.9V to 3.6V
5
mV
60
µA
LDOMode = 1, LDOin > 1.95V
1.67
V
LDOMode = 0, LDOin > 2.0V
1.72
LDOMode = 2, LDOin > 2.05V
1.77
±2
%
Load Regulation
Load current range 0 to 50mA
15
mV
Line Regulation
Input Supply Range 1.9V to 3.6V
5
mV
60
µA
(1) (2)
Power Delivered
LOW DROPOUT REGULATOR (AVdd)
Output Voltage
Output Voltage Accuracy
Decoupling Capacitor
µF
1
Bias Current
V
LOW DROPOUT REGULATOR (DVdd)
Output Voltage
Output Voltage Accuracy
Decoupling Capacitor
Bias Current
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µF
1
Electrical Specifications
11
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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ELECTRICAL CHARACTERISTICS (continued)
At 25°C, AVdd, DVdd, IOVDD = +1.8V, LDO_in = 3.3V, AVdd LDO disabled, fs (Audio) = 48kHz, Cref = 10 µF on REF PIN,
PLL disabled unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE
Reference Voltage Settings
Reference Noise
CMMode = 0 (0.9V)
0.9
CMMode = 1 (0.75V)
0.75
CM=0.9V, A-weighted, 20Hz to 20kHz bandwidth,
Cref = 10µF
Decoupling Capacitor
V
µVRMS
1
1
Bias Current
10
µF
120
µA
miniDSP (3)
Maximum miniDSP clock frequency - ADC
DVdd = 1.65V
55.3
MHz
Maximum miniDSP clock frequency - DAC
DVdd = 1.65V
55.3
MHz
I(DVdd)
0.9
µA
I(AVdd)
<0.9
µA
I(LDOin)
<0.9
µA
13
nA
Shutdown Current
Coarse AVdd supply turned off
LDO_select held at ground
No external digital input is toggled.
Device Setup
I(IOVDD)
(3)
3.4
miniDSP clock speed is specified by design and not tested in production.
ELECTRICAL CHARACTERISTICS
At 25°C, AVdd, DVdd, IOVDD = 1.8V
PARAMETER
TEST CONDITIONS
MIN
LOGIC FAMILY
VIH
Logic Level
VIL
TYP
CMOS
0.7 × IOVDD
V
IIH = 5µA, 1.2V ≤ IOVDD <1.6V
0.9 × IOVDD
V
IIH = 5µA, IOVDD < 1.2V
IOVDD
IIL = 5 µA, IOVDD > 1.6V
–0.3
V
IIL = 5µA, IOVDD < 1.2V
VOH
IOH = 2 TTL loads
VOL
IOL = 2 TTL loads
12
Electrical Specifications
UNIT
IIH = 5 µA, IOVDD > 1.6V
IIL = 5µA, 1.2V ≤ IOVDD <1.6V
Capacitive Load
MAX
0.3 × IOVDD
V
0.1 × IOVDD
V
0
V
0.8 × IOVDD
V
0.1 × IOVDD
10
V
pF
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3.4.1
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
TIMING — AUDIO DATA SERIAL INTERFACE TIMING
All numbers are from characterization and are not tested in final production.
WCLK
td(WS)
BCLK
td(DO-WS)
td(DO-BCLK)
DOUT
tS(DI)
th(DI)
DIN
I2S/LJF Timing in Master Mode
Figure 3-1. I2S/LJF/RJF Timing in Master Mode
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Electrical Specifications
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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All numbers are from characterization and are not tested in final production.
3.4.2
TYPICAL TIMING CHARACTERISTICS (see Figure 3-1)
All specifications at 25°C, DVdd = 1.8V
Table 3-1. I2S/LJF/RJF Timing in Master Mode
PARAMETER
IOVDD=1.8V
MIN
IOVDD=3.3V
MAX
MIN
UNITS
MAX
td(WS)
WCLK delay
30
20
ns
td (DO-WS)
WCLK to DOUT delay (For LJF Mode only)
20
20
ns
td (DO-BCLK)
BCLK to DOUT delay
22
20
ns
ts(DI)
DIN setup
8
8
th(DI)
DIN hold
8
8
tr
Rise time
24
12
ns
tf
Fall time
24
12
ns
ns
ns
Note: All timing specifications are measured at characterization but not tested at final test.
WCLK
td (WS)
td(DO-BCLK)
td (DO-WS)
BCLK
DOUT
th (DI)
ts (DI)
DIN
I2S/LJF/RJF Timing in Master Mode
Figure 3-2. I2S/LJF/RJF Timing in Slave Mode
3.4.3
TYPICAL TIMING CHARACTERISTICS (see Figure 3-2)
All specifications at 25°C, DVdd = 1.8V
Table 3-2. I2S/LJF/RJF Timing in Slave Mode
PARAMETER
IOVDD=1.8V
MIN
IOVDD=3.3V
MAX
MIN
UNITS
MAX
BCLKH (BCLK)
BCLK high period
35
35
BCLKL (BCLK)
BCLK low period
35
35
ts (WS)
WCLK setup
8
8
th (WS)
WCLK hold
8
8
td (DO-WS)
WCLK to DOUT delay (For LJF mode only)
20
td (DO-BCLK)
BCLK to DOUT delay
22
ts(DI)
DIN setup
8
th(DI)
DIN hold
8
tr
Rise time
4
4
tf
Fall time
4
4
14
Electrical Specifications
ns
20
22
8
8
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Note: All timing specifications are measured at characterization but not tested at final test.
WCLK
td(WS)
td(WS)
BCLK
td(DO-BCLK)
DOUT
th(DI)
ts(DI)
DIN
Figure 3-3. DSP Timing in Master Mode
3.4.3.1 TYPICAL TIMING CHARACTERISTICS (see Figure 3-3)
All specifications at 25°C, DVdd = 1.8V
Table 3-3. DSP Timing in Master Mode
PARAMETER
IOVDD=1.8V
MIN
IOVDD=3.3V
MAX
MIN
30
UNITS
MAX
td (WS)
WCLK delay
td (DO-BCLK)
BCLK to DOUT delay
ts(DI)
DIN setup
8
8
ns
th(DI)
DIN hold
8
8
ns
tr
Rise time
24
12
ns
tf
Fall time
24
12
ns
22
20
ns
20
ns
Note: All timing specifications are measured at characterization but not tested at final test.
WCLK
th(ws)
BCLK
ts(ws)
th(ws)
th(ws)
tL(BCLK)
tH(BCLK)
tP(BCLK)
td(DO-BCLK)
DOUT
ts(DI)
th(DI)
DIN
Figure 3-4. DSP Timing in Slave Mode
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Electrical Specifications
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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3.4.3.2 TYPICAL TIMING CHARACTERISTICS (see Figure 3-4)
All specifications at 25°C, DVdd = 1.8V
Table 3-4. DSP Timing in Slave Mode
PARAMETER
IOVDD=1.8V
MIN
IOVDD=3.3V
MAX
MIN
UNITS
MAX
tH (BCLK)
BCLK high period
35
35
ns
tL (BCLK)
BCLK low period
35
35
ns
ts(WS)
WCLK setup
8
8
ns
th(WS)
WCLK hold
8
td (DO-BCLK)
BCLK to DOUT delay
ts(DI)
DIN setup
8
8
ns
th(DI)
DIN hold
8
8
ns
tr
Rise time
4
4
ns
tf
Fall time
4
4
ns
8
22
ns
22
ns
Note: All timing specifications are measured at characterization but not tested at final test.
3.4.4
I2C INTERFACE TIMING
Figure 3-5.
Table 3-5. I2C INTERFACE TIMING
PARAMETER
TEST CONDITION
Standard-Mode
MIN
Fast-Mode
MAX
UNITS
MAX
SCL clock frequency
Hold time (repeated) START
condition. After this period, the first
clock pulse is generated.
4.0
0.8
µs
tLOW
LOW period of the SCL clock
4.7
1.3
µs
tHIGH
HIGH period of the SCL clock
4.0
0.6
µs
tSU;STA
Setup time for a repeated START
condition
4.7
0.8
µs
tHD;DAT
Data hold time: For I2C bus
devices
tSU;DAT
Data set-up time
tr
SDA and SCL Rise Time
tf
SDA and SCL Fall Time
tSU;STO
Set-up time for STOP condition
4.0
0.8
µs
tBUF
Bus free time between a STOP
and START condition
4.7
1.3
µs
Cb
Capacitive load for each bus line
Electrical Specifications
0
TYP
tHD;STA
0
100
MIN
fSCL
16
0
TYP
400
3.45
0
1000
20+0.1Cb
300
300
20+0.1Cb
300
250
0.9
100
400
kHz
µs
ns
400
ns
ns
pF
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3.4.5
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
SPI INTERFACE TIMING
SSZ
S
t
t Lead
t
t Lag
td
sck
SCLK
t wsck
tf
tr
t wsck
tv
MISO
t ho
MSB OUT
t dis
BIT 6 . . . 1
LSB OUT
ta
MOSI
t hi
t su
MSB IN
BIT 6 . . . 1
LSB IN
Figure 3-6. SPI Interface Timing Diagram
3.4.5.1 TIMING REQUIREMENTS (SEE Figure 3-6)
At 25°C, DVdd = 1.8V
Table 3-6. SPI Interface Timing
PARAMETER
TEST CONDITION
IOVDD=1.8V
MIN
IOVDD=3.3V
TYP MAX
MIN
TYP
UNITS
MAX
tsck
SCLK Period (1)
100
50
ns
tsckh
SCLK Pulse width High
50
25
ns
tsckl
SCLK Pulse width Low
50
25
ns
tlead
Enable Lead Time
30
20
ns
ttrail
Enable Trail Time
30
20
ns
td;seqxfr
Sequential Transfer Delay
40
ta
Slave DOUT access time
40
20
ns
tdis
Slave DOUT disable time
40
20
ns
tsu
DIN data setup time
15
10
th;DIN
DIN data hold time
15
10
tv;DOUT
DOUT data valid time
tr
tf
(1)
20
ns
ns
ns
25
18
ns
SCLK Rise Time
4
4
ns
SCLK Fall Time
4
4
ns
These parameters are based on characterization and are not tested in production.
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Electrical Specifications
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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4 TYPICAL CHARACTERISTICS
4.1 TYPICAL PERFORMANCE
ADC SNR
vs
CHANNEL GAIN
TOTAL HARMONIC DISTORTION
vs
HEADPHONE OUTPUT POWER
100
0
THD - Total Harmonic Distortion - dB
SNR - Signal-to-Noise Ratio - dB
CM=0.9 V,
-10 RL = 32 W
RIN = 10 kW, Differential
90
80
RIN = 20 kW, Differential
70
60
50
RIN = 10 kW, Single Ended
40
30
RIN = 20 kW, Single Ended
20
-40
-50
-60
-70
-80
-90
-100
20
60
40
CM=1.65 V,
RL = 16 W
-30
0
0
0
20
Channel Gain - dB
100
Figure 4-2.
TOTAL HARMONIC DISTORTION
vs
HEADPHONE OUTPUT POWER
HEADPHONE SNR AND OUTPUT POWER
vs
OUTPUT COMMON MODE SETTING
70
105
Load = 32 W BTL
-10
100
-20
SNR - Signal-to-Noise Ratio - dB
THD - Total Harmonic Distortion - dB
40
60
80
Headphone Output Power - mW
Figure 4-1.
0
-30
CM=1.5 V
-40
CM=1.65 V
-50
-60
-70
-80
60
SNR
95
50
90
40
85
80
30
OUTPUT POWER
75
20
70
10
65
-90
-100
60
0
50
100
150
Headphone output Power - mW
Figure 4-3.
18
CM=1.65 V,
RL = 32 W
-20
10
-20
CM=0.9 V,
RL = 16 W
TYPICAL CHARACTERISTICS
200
0
0.75
0.9
1.5
1.25
Output Common Mode Setting - V
1.65
Figure 4-4.
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LDO DROPOUT VOLTAGE
vs
LOAD CURRENT
LDO LOAD RESPONSE
350
20
DVDD LDO
15
Change In Output Voltage - mV
300
Dropout Voltage - mV
250
200
AVDD LDO
150
100
50
10
AVDD LDO
5
0
DVDD LDO
-5
-10
-15
0
-20
0
10
20
30
Load - mA
40
50
0
10
20
Load - mA
Figure 4-5.
30
40
50
Figure 4-6.
MICBIAS MODE 2, CM = 0.9V, LDOIN OP STAGE
vs
MICBIAS LOAD CURRENT
2.6
MicBIAS Voltage - mV
2.55
2.5
2.45
2.4
0
0.5
1
1.5
2
MicBIAS Load - mA
2.5
3
Figure 4-7.
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TYPICAL CHARACTERISTICS
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4.2 FFT
SINGLE ENDED LINE INPUT TO ADC FFT @ -1dBr
vs
FREQUENCY
DAC PLAYBACK TO HEADPHONE FFT @ -1dBFS
vs
FREQUENCY
0
0
DAC
ADC
-20
-20
-40
Power - dBr
Power - dBFs
-40
-60
-80
-60
-80
-100
-100
-120
-120
-140
0
5000
10000
f - Frequency - Hz
20000
15000
0
5000
10000
f - Frequency - Hz
15000
20000
Figure 4-8.
Figure 4-9.
DAC PLAYBACK TO LINE-OUT FFT @ -1dBFS
vs
FREQUENCY
LINE INPUT TO HEADPHONE FFT @ 446mVrms
vs
FREQUENCY
0
0
DAC
-20
-20
-40
Power - dBr
Power - dBr
-40
-60
-60
-80
-80
-100
-100
-120
-140
-120
0
5000
10000
f - Frequency - Hz
Figure 4-10.
20
TYPICAL CHARACTERISTICS
15000
20000
0
5000
10000
f - Frequency - Hz
15000
20000
Figure 4-11.
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LINE INPUT TO LINE-OUT FFT @ 446mVrms
vs
FREQUENCY
0
-20
Power - dBr
-40
-60
-80
-100
-120
-140
0
5000
10000
15000
20000
f - Frequency - Hz
Figure 4-12.
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TYPICAL CHARACTERISTICS
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5 Application Information
5.1 TYPICAL CIRCUIT CONFIGURATION
Host Processor
Reset MCLK
SCL
SDA
BCLK
WCLK
DIN
DOUT
SPI_Select
1k
1k
2.7k
MICBIAS
1K
0.1u
4700p
0.1u
LOL
0.1uF
1K
IN1_L
TPA2012
Class D Amp
LOR
IN1_R
0.1uF
0.1u
4700p
TLV320AIC3254
0.1u
0.1uF
1.9...3.6V
IN2_L
LDOIN
0.1uF 1.0uF 10uF
0.1uF
IN2_R
1.1...3.6V
1k
1k
IOVDD
MFP3/SCLK
0.1uF
LDO_SELECT
IN3_R
HPR
Headset_Mic
Earjack
microphone
and headset
speakers
HPL
AVSS
DVSS
IOVSS
AVDD
DVDD
REF
Headset_Spkr_R 47uF
10 uF
Headset_Spkr_L
Headset_Gnd
10 uF
10 uF
47uF
Figure 5-1. Typical Circuit Configuration
5.2 OVERVIEW
The TLV320AIC3254 offers a wide range of configuration options. Figure 1-1 shows the basic functional
blocks of the device.
5.2.1
Digital Pins
Only a small number of digital pins are dedicated to a single function; whenever possible, the digital pins
have a default function, and also can be reprogrammed to cover alternative functions for various
applications.
The fixed-function pins are Reset , LDO_Select and the SPI_Select pin, which are HW control pins.
Depending on the state of SPI_Select, the two control-bus pins SCL/SSZ and SDA/MOSI are configured
for either I2C or SPI protocol.
Other digital IO pins can be configured for various functions via register control. An overview of available
functionality is given in Section 5.2.5 below.
22
Application Information
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5.2.2
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Analog Pins
Analog functions can also be configured to a large degree. For minimum power consumption, analog
blocks are powered down by default. The blocks can be powered up with fine granularity according to the
application needs.
The possible analog routings of analog input pins to ADCs and output amplifiers as well as the routing
from DACs to output amplifiers can be seen in Figure 5-2.
5.2.3
Power Supply
To power up the device, a 3.3V system rail (1.9V to 3.6V) can be used. Internal LDOs generate the
appropriate digital core voltage of 1.65V and analog core voltage of 1.8V (minimum 1.5V). For maximum
flexibility, the respective voltages can also be supplied externally, bypassing the built-in LDOs. To support
high-output drive capabilities, the output stages of the output amplifiers can either be driven from the
analog core voltage or the 1.9…3.6V rail used for the LDO inputs (LDO_in).
5.2.4
Clocking
To minimize power consumption, the system ideally provides a master clock that is a suitable integer
multiple of the desired sampling frequencies. In such cases, internal dividers can be programmed to set
up the required internal clock signals at very low power consumption. For cases where such master clocks
are not available, the built-in PLL can be used to generate a clock signal that serves as an internal master
clock. In fact, this master clock can also be routed to an output pin and may be used elsewhere in the
system. The clock system is flexible enough that it even allows the internal clocks to be derived directly
from an external clock source, while the PLL is used to generate some other clock that is only used
outside the TLV320AIC3254.
5.2.5
Multifunction Pins
The table below shows the possible allocation of pins for specific functions. The PLL input, for example,
can be derived from any of 4 pins (MCLK, BCLK, DIN, GPIO). The next table then summarizes the
register settings that must be applied to configure the pin assignment. In the second table, the
letter/number combination refers to the letter defining the row and the pin number of the first table.
Pin Function
A
PLL Input
B
Codec Clock Input
2
C
I S BCLK input
D
I2S BCLK output
E
2
BCLK
S (1)
S (2)
S (1) ,D (5)
S (2)
3
WCLK
I2S ADC word clock input
H
I2S ADC WCLK out
I
I2S DIN
J
I2S DOUT
K
General Purpose Output I
K
General Purpose Output II
K
General Purpose Output III
L
General Purpose Input I
11
MISO
MFP4
32
GPIO
MFP5
S (4)
S ,D
E (6)
E
I S WCLK output
8
SCLK
MFP3
S (4)
E, D
G
5
DOUT
MFP2
(2)
2
I S WCLK input
4
DIN
MFP1
S (3)
2
F
(1)
(2)
(3)
(4)
(5)
(6)
1
MCLK
E
E
E
E
S (3) ,D
E, D
E
E
E
E
S(1): The MCLK pin can be used to drive the PLL and Codec Clock inputs simultaneously
S(2): The BCLK pin can be used to drive the PLL and Codec Clock and audio interface bit clock inputs simultaneously
S(3): The DIN/MFP1 pin can be used to drive the PLL and audio interface data inputs simultaneously
S(4): The GPIO/MFP5 pin can be used to drive the PLL and Codec Clock inputs simultaneously
D: Default Function
E: The pin is exclusively used for this function, no other function can be implemented with the same pin (e.g. if GPIO/MFP5 has been
allocated for General Purpose Output, it cannot be used as the INT1 output at the same time)
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Pin Function
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1
MCLK
2
BCLK
3
WCLK
4
DIN
MFP1
5
DOUT
MFP2
8
SCLK
MFP3
11
MISO
MFP4
32
GPIO
MFP5
L
General Purpose Input II
L
General Purpose Input III
M
INT1 output
E
E
E
N
INT2 output
E
E
E
O
Digital Microphone Data Input
P
Digital Microphone Clock Output
Q
Secondary I2S BCLK input
E
E
R
Secondary I2S WCLK in
E
E
S
2
Secondary I S DIN
E
T
Secondary I2S DOUT
U
Secondary I2S BLCK OUT
E
E
Secondary I S WCLK OUT
W
Headset Detect Input
X
Aux Clock Output
E
E
E
E
E
E
E
2
V
5.2.6
E
E
E
E
E
E
E
E
E
E
Register Settings for Multifunction Pins
The table below summarizes the multifunction pin specific settings that must be applied. Please be aware
that more settings may be necessary to obtain a full interface definition matching the application
requirement (e.g. registers Pg1 Reg 32 and 33).
Description
Required Register
Setting
N5
INT2 output on pin 5, DOUT/MFP2
Pg 0, Reg
53,D(3:1)=101
Pg 0, Reg 4, D(3:2)=01
N11
INT2 output on pin 11,
MISO/MFP4
Pg 0, Reg 55,
D(4:1)=0101
PLL Input on pin 4,
DIN/MFP1
Pg 0, Reg 54, D(2:1)=01
Pg 0, Reg 4, D(3:2)=11
N32
INT2 output on pin 32,
GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=0110
A32
PLL Input on pin 32,
GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0001
Pg 0, Reg 4, D(3:2)=10
O4
Digital Microphone Data Input on
pin 4, DIN/MFP1
Pg 0, Reg 54,
D(2:1)=01
Pg 0, Reg 81,
D(5:4)=10
B1
Codec Clock Input on pin 1,
Pg 0, Reg 4, D(1:0)=00
MCLK
O8
Digital Microphone Data Input on
pin 8, SCLK/MFP3
Pg 0, Reg 56,
D(2:1)=01
Pg 0, Reg 81,
D(5:4)=01
B2
Codec Clock Input on pin 2,
Pg 0, Reg 4, D(1:0)=01
BCLK
O32
Digital Microphone Data Input on
pin 32, GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=0001
Pg 0, Reg 81,
D(5:4)=00
B32
Codec Clock Input on pin
32, GPIO/MPF5
Pg 0, Reg 52, D(5:2)=0001
Pg 0, Reg 4, D(1:0)=10
P11
Digital Microphone Clock Output
on pin 11, MISO/MFP4
Pg 0, Reg 55,
D(4:1)=0111
C2
I2S BCLK input on pin 2,
BCLK
Pg 0, Reg 27, D(3)=0
P32
Digital Microphone Clock Output
on pin 32, GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=1010
D2
I2S BCLK output on pin 2,
BCLK
Pg 0, Reg 27, D(3)=1
Q8
Secondary I2S BCLK input on pin
8, SCLK/MFP3
Pg 0, Reg 56,
D(2:1)=01
Pg 0, Reg 31,6:5)=01
E3
I2S WCLK input on pin 3,
WCLK
Pg 0, Reg 27, D(2)=0
Q32
Secondary I2S BCLK input on pin
32, GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=0001
Pg 0, Reg 31,6:5)=00
F3
I2S WCLK output on pin3,
WCLK
Pg 0, Reg 27, D(2)=1
R8
Secondary I2S WCLK in on pin 8,
SCLK/MFP3
Pg 0, Reg 56,
D(2:1)=01
Pg 0, Reg 31,
D(4:3)=01
Description
Required Register Setting
A1
PLL Input on pin 1, MCLK
Pg 0, Reg 4, D(3:2)=00
A2
PLL Input on pin 2, BCLK
A4
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Required Register
Setting
Description
Required Register Setting
Description
G8
I2S ADC word clock input
on pin 8, SCLK/MFP3
Pg 0, Reg 56, D(2:1)=01
Pg 0, Reg 31, D(2:1)=01
R32
Pg 0, Reg 52,
Secondary I2S WCLK in on pin 32, D(5:2)=0001
GPIO/MFP50
Pg 0, Reg 31,
D(4:3)=0
G32
I2S ADC word clock input
on pin 32 GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0001
Pg 0, Reg 31, D(2:1)=00
S8
Secondary I2S DIN on pin 8,
SCLK/MFP3
Pg 0, Reg 56,
D(2:1)=01
Pg 0, Reg 31,0=1
H11
I2S ADC WCLK out on pin
11 MISO/MFP4
Pg 0, Reg 55, D(4:1)=0110
S32
Secondary I2S DIN on pin 32,
GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=0001
Pg 0, Reg 31,0=0
H32
I2S ADC WCLK out on pin
32 GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0111
T11
Secondary I2S DOUT on pin 11,
MISO/MFP4
Pg 0, Reg 55,
D(4:1)=1000
I4
I2S DIN on pin 4,
DIN/MFP1
Pg 0, Reg 54, D(2:1)=01
U5
Secondary I2S BCLK OUT on pin
5, DOUT/MFP2
Pg 0, Reg 53,
D(3:1)=110
J5
I2S DOUT on pin 4,
DOUT/MFP2
Pg 0, Reg 53, D(3:1)=001
U11
Secondary I2S BCLK OUT on pin
11, MISO/MFP4
Pg 0, Reg 55,
D(4:1)=1001
K5
General Purpose Out I on
pin 5, DOUT/MFP2
Pg 0, Reg 53, D(3:1)=010
U32
Secondary I2S BCLK OUT on pin
32, GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=1000
K11
General Purpose Out II on
pin 11, MISO/MFP4
Pg 0, Reg 55, D(4:1)=0010
V5
Secondary I2S WCLK OUT on pin
5, SCLK/MFP3
Pg 0, Reg 53,
D(3:1)=111
K32
General Purpose Out III on
pin 32, GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0011
V11
Secondary I2S WCLK OUT on pin
11, MISO/MFP4
Pg 0, Reg 55,
D(4:1)=1010
L4
General Purpose In I on pin
Pg 0, Reg 54, D(2:1)=10
4, DIN/MFP1
V32
Secondary I2S WCLK OUT on pin
32, GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=1001
L8
General Purpose In II on
pin 8, SCLK/MFP3
Pg 0, Reg 56, D(2:1)=10
W8
Headset Detect Input on pin 8,
SCLK/MFP3
Pg 0, Reg 56,
D(2:1)=00
Pg 0,67,7=1
L32
General Purpose In III on
pin 32, GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0010
X5
Aux Clock Output on pin 5,
DOUT/MFP2
Pg 0, Reg 53,
D(3:1)=011
M5
INT1 output on pin 5,
DOUT/MFP2
Pg 0, Reg 53, D(3:1)=100
X11
Aux Clock Output on pin 11,
MISO/MFP4
Pg 0, Reg 55,
D(4:1)=0011
M11
INT1 output on pin 11,
MISO/MFP4
Pg 0, Reg 55, D(4:1)=0100
X32
Aux Clock Output on pin 32,
GPIO/MFP5
Pg 0, Reg 52,
D(5:2)=0100
M32
INT1 output on pin 32,
GPIO/MFP5
Pg 0, Reg 52, D(5:2)=0101
5.3 miniDSP
The TLV320AIC3254 features two miniDSP cores. The first miniDSP core is tightly coupled to the ADC,
the second miniDSP core is tightly coupled to the DAC. The fully programmable algorithms for the
miniDSP must be loaded into the device after power up. The miniDSPs have direct access to the digital
stereo audio stream on the ADC and on the DAC side, offering the possibility for advanced, very low
group delay DSP algorithms. Each miniDSP can run up to 1152 instructions on every audio sample at
48kHz sample rate. The two cores can run fully synchronized and can exchange data. Typical algorithms
for the TLV320AIC3254 miniDSPs are active noise cancellation, acoustic echo cancellation or advanced
DSP sound enhancement algorithms.
5.3.1
Software
Software development for the TLV320AIC3254 is supported through TI's comprehensive PurePath Studio
Development Environment. A powerful, easy-to-use tool designed specifically to simplify software
development on the TLV320AIC3xxx miniDSP audio platform. The Graphical Development Environment
consists of a library of common audio functions that can be dragged-and-dropped into an audio signal flow
and graphically connected together. The DSP code can then be assembled from the graphical signal flow
with the click of a mouse.
Please visit the TLV320AIC3254 product folder on www.ti.com to learn more about PurePath Studio and
the latest status on available, ready-to-use DSP algorithms.
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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5.4 ANALOG ROUTING
AVDD
LDOIN
Vol Ctrl 0… -72dB
IN1_L
IN2_L
Mixer Amp
0..-30dB
IN1L
MAL
IN3_L
LDAC
MAR
Headphone
Amplifier
-6dB … + 29 dB
HPL
Line Out
Amplifier
-6dB … + 29 dB
LOL
Line Out
Amplifier
-6dB … + 29 dB
LOR
IN1_R
P
CM HP
P
+ PGA
Mic
LeftLADC
ADC
0...47.5 dB
N
Left DAC
-
IN2_R
N
MAL
IN3_R
LDAC
RDAC
Left Channel, Input Options:
LOR
Single Ended:
IN1_L or IN2_L or IN3_L or IN1_R
Differential:
IN2_L and IN2_R or
IN3_L and IN3_R
CM2L
CM LO
CM1L
1,10,6
CM1R
CM
CM2R
Right Channel, Input Options:
Single Ended:
IN1_R or IN2_R or IN3_R or IN2_L
Differential:
IN1_R and IN1_L or
IN3_R and IN3_L
IN3_L
RDAC
MAR
IN1_L
P
N
+ PGA
Mic
0...47.5 dB
P
LeftLADC
ADC
Right DAC
CM HP
-
IN2_L
N
HPL
LDAC
IN3_R
Mixer Amp
0..-30dB
IN2_R
RDAC
Headphone
Amplifier
-6dB … + 29 dB
HPR
MAR
IN1R
IN1_R
Vol Ctrl 0… -72dB
Figure 5-2. Analog Routing Diagram
5.4.1
Analog Low Power Bypass
The TLV320AIC3254 offers two analog-bypass modes. In either of the modes, an analog input signal can
be routed from an analog input pin to an amplifier driving an analog output pin. Neither the ADC nor the
DAC resources are required for such operation; this supports low-power operation during analog-bypass
mode.
In analog low-power bypass mode, line-level signals can be routed directly from the analog inputs IN1L to
the left headphone amplifier (HPL) and IN1R to HPR. This is configured on Page 1, Register 12, D(2) for
the left channel and Page 1, Register 13, D(2) for the right channel
5.4.2
ADC Bypass Using Mixer Amplifiers
In addition to the low-power bypass mode, there is a bypass mode that uses the programmable gain
amplifiers of the input stage in conjunction with a mixer amplifier. With this mode, microphone-level signals
can be amplified and routed to the line or headphone outputs, fully bypassing the ADC and DAC.
To enable this mode, the mixer amplifiers are powered on (Page1, Register 9, D(0:1).
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5.5 DEVICE INITIALIZATION
5.5.1
Reset
The TLV320AIC3254 internal logic must be initialized to a known condition for proper device function. To
initialize the device in its default operating condition, the hardware reset pin (RESET) must be pulled low
for at least 10ns. For this initialization to work, both the IOVDD and DVdd supplies must be powered up. It
is recommended that while the DVdd supply is being powered up, the RESET pin be pulled low.
The device can also be reset via software reset. Writing '1' into Page 0, Register 1, D(0) resets the device.
After a device reset, all registers are initialized with default values as listed in Section 6
5.5.2
Device Startup Lockout Times
After the TLV320AIC3254 is initialized through hardware reset at power-up or software reset, the internal
memories is initialized to default values. This initialization takes place within 1ms after pulling the RESET
signal high. During this initialization phase no Register read or Register write operation should be
performed on ADC or DAC coefficient buffers. Also, no block within the codec should be powered up
during the initialization phase.
5.5.3
Analog and Reference Startup
The TLV320AIC3254 uses an external REF pin for decoupling the reference voltage used for the data
converters and other analog blocks. REF pin requires a minimum 1uF decoupling capacitor from REF to
AVss. In order for any analog block to be powered up, the Analog Reference block must be powered up.
By default, the Analog Reference block will implicitly be powered up whenever any analog block is
powered up, or it can be powered up independently. Detailed descriptions of Analog Reference including
fast power-up options are provided in Section 5.20. During the time that the reference block is not
completely powered up, subsequent requests for powering up analog blocks (e.g., PLL) are queued, and
executed after the reference power up is complete.
5.5.4
PLL Startup
Whenever the PLL is powered up, a startup delay of approx of 10ms is involved after the power up
command of the PLL and before the clocks are available to the codec. This delay is to ensure stable
operation of PLL and clock-divider logic.
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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5.6 POWERTUNE
The TLV320AIC3254 features PowerTune, a mechanism to balance power-versus-performance trade-offs
at the time of device configuration. The device can be tuned to minimize power dissipation, to maximize
performance, or to an operating point between the two extremes to best fit the application.
5.6.1
PowerTune Modes
The TLV320AIC3254 PowerTune modes are called PTM_R1 to PTM_R4 for the recording (ADC) path and
PTM_P1 to PTM_P4 for the playback (DAC) path.
5.6.1.1 ADC – Programming PTM_R1 to PTM_R4
The device powers up with PTM_R4 (highest performance) set as default. This mode always works across
all combinations of common-mode voltage, chosen processing block, or chosen oversampling ratio. If the
application can make use of a lower-power configuration please refer to the ADC and DAC power
consumption chapters below for valid combination of PowerTune modes and other device parameters.
The ADC configuration of the PowerTune mode affects right and left channels simultaneously.
PTM_R1
PTM_R2
PTM_R3
PTM_R4
0xFF
0xB6
0x64
0x00
Pg 1, Reg 61, D(7:0)
5.6.1.2 DAC - Programming PTM_P1 to PTM_P4
On the playback side, the performance is determined by a combination of register settings and the audio
data word length applied. For the highest performance setting (PTM_P4), an audio-data word length of 20
bits is required, while for the modes PTM_P1 to PTM_P3 a word length of 16 bits is sufficient.
PTM_P1
PTM_P2
PTM_P3
PTM_P4
Pg 1, Reg 3, D(4:2)
0x2
0x1
0x0
0x0
Pg 1, Reg 4, D(4:2)
0x2
0x1
0x0
0x0
Audio Data word length
16 bits
16 bits
16 bits
20 or more bits
Pg 0, Reg 27, D(5:4)
0x0
0x0
0x0
0x1, 0x2, 0x3
5.6.1.3 Processing Blocks
The choice of processing blocks, PRB_P1 to PRB_P25 for playback and PRB_R1 to PRB_R18 for
recording, also influences the power consumption. In fact, the numerous processing blocks have been
implemented to offer a choice between power-optimization and configurations with more signal-processing
resources.
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5.6.2
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
ADC Power Consumption
The tables in this section give recommendations for various PowerTune modes. Typical performance and
power-consumption values are listed. PowerTune modes that are not supported are marked with an ‘X’.
All measurements were taken with the PLL turned off and the ADC configured for single-ended input.
5.6.2.1 ADC, Stereo, 48kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
AOSR = 128, Processing Block = PRB_R1 (Decimation Filter A)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
0dB full scale
X
375
375
375
X
500
500
500
mVRMS
Max. allowed input level w.r.t.
0dB full scale
X
–12
0
0
X
–12
0
0
dB full
scale
Effective SNR w.r.t.
max. allowed input level
X
78.5
90.7
90.2
X
80.4
92.9
92.7
dB
Power consumption
X
11.9
14.2
18.2
X
11.9
14.2
18.2
mW
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R2
A
+1.4
PRB_R3
A
+1.4
5.6.2.2 ADC, Stereo, 48kHz, DVdd = 1.8V, AVdd = 1.8V
AOSR = 64, Processing Block = PRB_R7 (Decimation Filter B)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
0dB full scale
375
X
375
X
X
X
500
X
mVRMS
Max. allowed input level w.r.t.
0dB full scale
–2
X
0
X
X
X
0
X
dB full
scale
Effective SNR w.r.t.
max. allowed input level
86.0
X
88.1
X
X
X
90.4
X
dB
Power consumption
8.4
X
11.4
X
X
X
11.5
X
mW
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R8
B
+0.7
PRB_R9
B
+0.7
PRB_R1
A
+2.0
PRB_R2
A
+3.4
PRB_R3
A
+3.4
5.6.2.3 ADC, Stereo, 48kHz, Lowest Power Consumption
AOSR = 64, Processing Block = PRB_R7 (Decimation Filter B), DVdd = 1.26V
PTM_R1
CM = 0.75V
AVdd=1.5V
PTM_R3
CM = 0.9V
AVdd=1.8V
UNIT
0dB full scale
375
500
mVRMS
Max. allowed input level w.r.t. 0dB
full scale
–2
0
dB full scale
Effective SNR w.r.t. max. allowed
input level
88.0
92.2
dB
Power consumption
6.0
11.4
mW
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Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R8
B
+ 0.3
PRB_R9
B
+ 0.3
PRB_R1
A
+ 1.0
PRB_R2
A
+ 1.6
PRB_R3
A
+ 1.6
5.6.2.4 ADC, Mono, 48kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
AOSR = 128, Processing Block = PRB_R4 (Decimation Filter A)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
0dB full scale
X
375
375
375
X
500
500
500
mVRMS
Max. allowed input level w.r.t.
0dB full scale
X
–12
0
0
X
–12
0
0
dB full
scale
Effective SNR w.r.t.
max. allowed input level
X
78.3
90.8
90.6
X
80.3
92.8
92.7
dB
Power consumption
X
9.1
11.4
15.4
X
9.1
11.4
15.4
mW
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R5
A
+0.7
PRB_R6
A
+0.7
5.6.2.5 ADC, Mono, 48kHz, DVdd = 1.8V, AVdd = 1.8V
AOSR = 64, Processing Block = PRB_R11 (Decimation Filter B)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
0dB full scale
375
X
375
X
X
X
500
X
mVRMS
Max. allowed input level w.r.t.
0dB full scale
–2
X
0
X
X
X
0
X
dB full
scale
Effective SNR w.r.t.
max. allowed input level
86.0
X
88.1
X
X
X
90.3
X
dB
Power consumption
7.0
X
10.1
X
X
X
10.1
X
mW
Alternative processing blocks:
30
Processing Block
Filter
Est. Power Change (mW)
PRB_R10
B
0
PRB_R12
B
0
PRB_R4
A
+0.7
PRB_R5
A
+1.4
PRB_R6
A
+1.4
Application Information
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
5.6.2.6 ADC, Mono, 48 kHz, Lowest Power Consumption,
AOSR = 64, Processing Block = PRB_R11 (Decimation Filter B), DVdd = 1.26V
PTM_R1
CM = 0.75V
AVdd=1.5V
PTM_R3
CM = 0.9V
AVdd=1.8V
UNIT
0dB full scale
375
500
mVRMS
Max. allowed input level w.r.t.
0dB full scale
–2
0
dB full scale
Effective SNR w.r.t.
max. allowed input level
86.0
90.5
dB
Power consumption
5.1
9.2
mW
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R10
B
0
PRB_R12
B
0
PRB_R4
A
+0.3
PRB_R5
A
+0.7
PRB_R6
A
+0.7
5.6.2.7 ADC, Stereo, 8kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
AOSR = 128, Processing Block = PRB_R1 (Decimation Filter A)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
375
X
X
X
500
X
X
X
mVRMS
0
X
X
X
0
X
X
X
dB full
scale
Effective SNR w.r.t.
max. allowed input level
91.1
X
X
X
93.2
X
X
X
dB
Power consumption
6.5
X
X
X
6.5
X
X
X
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R2
A
+0.2
PRB_R3
A
+0.2
5.6.2.8 ADC, Stereo, 8kHz, DVdd = 1.8V, AVdd = 1.8V
AOSR = 64, Processing Block = PRB_R7 (Decimation Filter B)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
375
X
X
X
500
X
X
X
mVRMS
0
X
X
X
0
X
X
X
dB full
scale
Effective SNR w.r.t.
max. allowed input level
88.2
X
X
X
90.6
X
X
X
dB
Power consumption
6.0
X
X
X
6.1
X
X
X
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R8
B
+ 0.1
PRB_R9
B
+ 0.1
PRB_R1
A
+ 0.3
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Processing Block
Filter
PRB_R2
A
Est. Power Change (mW)
+0.6
PRB_R3
A
+ 0.6
5.6.2.9 ADC, Stereo, 8kHz, Lowest Power Consumption,
AOSR = 64, Processing Block = PRB_R7 (Decimation Filter B), PowerTune Mode = PTM_R1, DVdd =
1.26
CM = 0.75V
AVdd=1.5V
CM = 0.9V
AVdd=1.8V
375
500
mVRMS
0
0
dB full scale
Effective SNR w.r.t.
max. allowed input level
88.3
92.4
dB
Power consumption
4.7
5.8
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
UNIT
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R8
B
+ 0.1
PRB_R9
B
+ 0.1
PRB_R1
A
+ 0.2
PRB_R2
A
+ 0.3
PRB_R3
A
+ 0.3
5.6.2.10 ADC, Mono, 8kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
AOSR = 128, Processing Block = PRB_R4 (Decimation Filter A)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
375
X
X
X
500
X
X
X
mVRMS
0
X
X
X
0
X
X
X
dB full
scale
Effective SNR w.r.t. max.
allowed input level
88.5
X
X
X
93.3
X
X
X
dB
Power consumption
5.5
X
X
X
5.6
X
X
X
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
Alternative processing blocks:
32
Processing Block
Filter
Est. Power Change (mW)
PRB_R5
A
+0.1
PRB_R6
A
+0.1
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
5.6.2.11 ADC, Mono, 8kHz, DVdd = 1.8V, AVdd = 1.8V
AOSR = 64, Processing Block = PRB_R11 (Decimation Filter B)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
375
X
X
X
500
X
X
X
mVRMS
0
X
X
X
0
X
X
X
dB full
scale
Effective SNR w.r.t.
max. allowed input level
88.1
X
X
X
93.0
X
X
X
dB
Power consumption
5.3
X
X
X
5.3
X
X
X
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R10
B
0
PRB_R12
B
0
PRB_R4
A
+0.1
PRB_R5
A
+0.2
PRB_R6
A
+0.2
5.6.2.12 ADC, Mono, 8kHz, Lowest Power Consumption
AOSR = 64, Processing Block = PRB_R11 (Decimation Filter B), PowerTune Mode = PTM_R1, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
CM = 0.9V
AVdd=1.8V
375
500
mVRMS
0
0
dB full scale
Effective SNR w.r.t.
max. allowed input level
88.2
89.9
dB
Power consumption
4.2
5.0
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
UNIT
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R10
B
0
PRB_R12
B
0
PRB_R4
A
+0.1
PRB_R5
A
+0.1
PRB_R6
A
+0.1
5.6.2.13 ADC, Stereo, 192kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
AOSR = 32, Processing Block = PRB_R14 (Decimation Filter C)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_R1
PTM_R2
PTM_R3
PTM_R4
PTM_R1
PTM_R2
PTM_R3
PTM_R4
UNIT
0dB full scale
X
X
X
375
X
X
X
500
mVRMS
Max. allowed input level w.r.t.
0dB full scale
X
X
X
0
X
X
X
0
dB full
scale
Effective SNR w.r.t.
max. allowed input level
X
X
X
86.5
X
X
X
88.7
dB
Power consumption
X
X
X
21.9
X
X
X
21.9
mW
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_R13
C
–2.7
PRB_R15
C
0
5.6.2.14 ADC, Stereo, 192kHz, Lowest Power Consumption
AOSR = 32, Processing Block = PRB_R14 (Decimation Filter C), PowerTune Mode = PTM_R4, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
CM = 0.9V
AVdd=1.8V
UNIT
375
500
mVRMS
0
0
dB full scale
Effective SNR w.r.t.
max. allowed input level
86.5
89.0
dB
Power consumption
16.2
18.4
mW
0dB full scale
Max. allowed input level w.r.t.
0dB full scale
Alternative processing blocks:
34
Processing Block
Filter
Est. Power Change (mW)
PRB_R13
C
– 1.3
PRB_R15
C
0
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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5.6.3
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
DAC Power Consumption
The tables in this section give recommendations for various DAC PowerTune modes. Typical performance
and power-consumption numbers are listed. PowerTune modes which are not supported are marked with
an ‘X’.
All measurements were taken with the PLL turned off, no signal is present, and the DAC modulator is fully
running.
5.6.3.1 DAC, Stereo, 48kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
DOSR = 128, Processing Block = PRB_P8 (Interpolation Filter B)
Device Common Mode Setting = 0.75V
0dB full scale (1)
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
75
225
375
375
100
300
500
500
mVRMS
88.7
94.1
98.9
99.0
90.5
96.3
100.0
100.0
dB
HP out
(32Ω
load)
Effective SNR w.r.t.
0dB full scale
Power consumption
9.4
10.1
10.9
10.9
9.5
10.1
10.9
10.9
mW
Line out
Effective SNR w.r.t.
0dB full scale
88.7
94.1
98.9
99.0
90.5
96.3
100.0
100.0
dB
Power consumption
7.7
8.4
9.1
9.1
7.7
8.4
9.1
9.2
mW
(1)
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
PRB_P1
A
0
PRB_P2
A
+3.1
PRB_P3
A
+1.6
PRB_P7
B
–1.6
PRB_P9
B
0
PRB_P10
B
+1.6
PRB_P11
B
–0.8
PRB_P23
A
0
PRB_P24
A
+3.1
PRB_P25
A
+3.1
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Est. Power Change (mW)
Application Information
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
5.6.3.2 DAC, Stereo, 48kHz, Lowest Power Consumption
DOSR = 64, Interpolation Filter B, DVdd = 1.26V
CM = 0.75V
AVdd=1.5V
PRB_P8
PTM_P1
0dB full scale (1)
HP out
(32Ω load)
Line out
(1)
Effective SNR w.r.t.
0dB full scale
CM = 0.9V
AVdd=1.8V
PRB_P8
PTM_P1
CM = 0.75V
AVdd=1.5V
PRB_P7
PTM_P4
UNIT
75
100
375
mVRMS
89.4
89.4
99.9
dB
Power consumption
5.5
6.9
7.1
mW
Effective SNR w.r.t.
0dB full scale
89.5
91.2
100.1
dB
Power consumption
4.2
4.1
5.1
mW
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
(1)
Est. Power Change (mW) (1)
Processing Block
Filter
PRB_P1
A
0
PRB_P2
A
+1.5
PRB_P3
A
+0.8
PRB_P7
B
–0.8
PRB_P9
B
0
PRB_P10
B
+0.8
PRB_P11
B
0
PRB_P23
A
0
PRB_P24
A
+1.5
PRB_P25
A
+1.5
Estimated power change is w.r.t. PRB_P8.
5.6.3.3 DAC, Mono, 48kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
DOSR = 128, Processing Block = PRB_P13 (Interpolation Filter B)
Device Common Mode Setting = 0.75V
0dB full scale (1)
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
75
225
375
375
100
300
500
500
mVRMS
HP out
(32Ω
load)
Effective SNR w.r.t.
0dB full scale
88.1
96.1
98.7
99.5
90.4
96.3
99.4
100
dB
Power consumption
5.8
6.2
6.5
6.5
5.8
6.2
6.5
6.5
mW
Line out
Effective SNR w.r.t.
0dB full scale
89.6
97.1
100.3
100.3
90.5
96.3
100
100
dB
Power consumption
5.0
5.4
5.7
5.7
5.0
5.4
5.7
5.7
mW
(1)
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
36
Processing Block
Filter
Est. Power Change(mW)
PRB_P4
A
0
PRB_P5
A
+1.6
PRB_P6
A
+1.6
PRB_P12
B
–0.8
PRB_P14
B
0
PRB_P15
B
+1.6
PRB_P16
B
0
Application Information
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
5.6.3.4 DAC, Mono, 48kHz, Lowest Power Consumption
DOSR = 64, Processing Block = PRB_P13 (Interpolation Filter B), PowerTune Mode = PTM_P1, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
0dB full scale (1)
HP out
(32Ω load)
Effective SNR w.r.t.
0dB full scale
Line out
(1)
CM = 0.9V
AVdd=1.8V
UNIT
75
100
mVRMS
88.9
90.8
dB
Power consumption
3.4
3.8
mW
Effective SNR w.r.t.
0dB full scale
89.5
91.1
dB
Power consumption
3.0
3.1
mW
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
PRB_P4
A
Est. Power Change (mW)
0
PRB_P5
A
+0.8
PRB_P6
A
+0.8
PRB_P12
B
–0.4
PRB_P14
B
0
PRB_P15
B
+0.8
PRB_P16
B
0
5.6.3.5 DAC, Stereo, 8kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
DOSR = 768, Processing Block = PRB_P7 (Interpolation Filter B)
Device Common Mode Setting = 0.75V
0dB full scale
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
75
X
X
X
100
X
X
X
mVRMS
88.7
X
X
X
90.5
X
X
X
dB
HP out
(32Ω
load)
Effective SNR w.r.t.
0dB full scale (1)
Power consumption
6.1
X
X
X
6.1
X
X
X
mW
Line out
Effective SNR w.r.t.
0dB full scale
88.7
X
X
X
90.5
X
X
X
dB
Power consumption
3.6
X
X
X
4.3
X
X
X
mW
(1)
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P1
A
+0.3
PRB_P2
A
+0.8
PRB_P3
A
+0.5
PRB_P8
B
+0.3
PRB_P9
B
+0.3
PRB_P10
B
+0.5
PRB_P11
B
+0.3
PRB_P23
A
+0.3
PRB_P24
A
+0.8
PRB_P25
A
+0.8
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
5.6.3.6 DAC, Stereo, 8kHz, Lowest Power Consumption
DOSR = 384, Processing Block = PRB_P7 (Interpolation Filter B), PowerTune Mode = PTM_P1, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
0dB full scale (1)
HP out
(32Ω load)
Effective SNR w.r.t.
0dB full scale
Line out
(1)
CM = 0.9V
AVdd=1.8V
UNIT
75
100
mVRMS
88.4
90.2
dB
Power consumption
3.8
5.1
mW
Effective SNR w.r.t.
0dB full scale
89.6
91.1
dB
Power consumption
2.4
2.9
mW
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P1
A
+0.1
PRB_P2
A
+0.4
PRB_P3
A
+0.3
PRB_P8
B
+0.1
PRB_P9
B
+0.1
PRB_P10
B
+0.3
PRB_P11
B
+0.1
PRB_P23
A
+0.1
PRB_P24
A
+0.4
PRB_P25
A
+0.4
5.6.3.7 DAC, Mono, 8kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
DOSR = 768, Processing Block = PRB_P4 (Interpolation Filter A)
Device Common Mode Setting = 0.75V
0dB full scale
(1)
PTM_P2
PTM_P3
PTM_P4
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
75
X
X
X
100
X
X
X
mVRMS
89.4
X
X
X
89.8
X
X
X
dB
Power consumption
4.4
X
X
X
4.4
X
X
X
mW
Effective SNR w.r.t.
0dB full scale
89.6
X
X
X
91.2
X
X
X
dB
Power consumption
3.6
X
X
X
3.6
X
X
X
mW
HP out
(32Ω
load)
Effective SNR w.r.t.
0dB full scale
Line out
(1)
PTM_P1
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
38
Processing Block
Filter
Est. Power Change (mW)
PRB_P5
A
+0.3
PRB_P6
A
+0.3
PRB_P12
B
–0.1
PRB_P13
B
0
PRB_P14
B
0
PRB_P15
B
+0.3
PRB_P16
B
0
Application Information
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
5.6.3.8 DAC, Mono, 8kHz, Lowest Power Consumption
DOSR = 384, Processing Block = PRB_P4 (Interpolation Filter A), PowerTune Mode = PTM_P1, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
0dB full scale (1)
HP out
(32Ω load)
Effective SNR w.r.t.
0dB full scale
Line out
(1)
CM = 0.9V
AVdd=1.8V
UNIT
75
100
mVRMS
89.1
90.7
dB
Power consumption
2.6
3.0
mW
Effective SNR w.r.t.
0dB full scale
89.5
91.1
dB
Power consumption
2.0
2.2
mW
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P5
A
+0.1
PRB_P6
A
+0.1
PRB_P12
B
–0.1
PRB_P13
B
0
PRB_P14
B
0
PRB_P15
B
+0.1
PRB_P16
B
0
5.6.3.9 DAC, Stereo, 192kHz, DVdd = 1.8V, AVdd = 1.8V
DOSR = 32, Processing Block = PRB_P17 (Interpolation Filter C)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
0dB full scale (1)
X
X
X
375
X
X
X
500
mVRMS
HP out
(32Ω
load)
Effective SNR w.r.t.
0dB full scale
X
X
X
99.1
X
X
X
99.9
dB
Power consumption
X
X
X
13.4
X
X
X
13.5
mW
Line out
Effective SNR w.r.t.
0dB full scale
X
X
X
100.5
X
X
X
100.5
dB
Power consumption
X
X
X
11.3
X
X
X
11.3
mW
(1)
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P18
C
+9.3
PRB_P19
C
+3.1
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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5.6.3.10 DAC, Stereo, 192kHz, Lowest Power Consumption
DOSR = 16, Processing Block = PRB_R17 (Interpolation Filter C), PowerTune Mode = PTM_P4, DVdd =
1.26V
CM = 0.75V
AVdd=1.5V
0dB full scale (1)
HP out
(32Ω load)
Line out
(1)
CM = 0.9V
AVdd=1.8V
UNIT
375
500
mVRMS
Effective SNR w.r.t.
0dB full scale
99.4
100.3
dB
Power consumption
7.7
8.9
mW
Effective SNR w.r.t.
0dB full scale
100.4
100.4
dB
Power consumption
6.1
6.7
mW
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see Section 5.14.1.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P18
C
+4.5
PRB_P19
C
+1.5
5.7 ADC
5.7.1
Concept
The TLV320AIC3254 includes a stereo audio ADC, which uses a delta-sigma modulator with a
programmable oversampling ratio, followed by a digital decimation filter. The ADC supports sampling rates
from 8kHz to 192kHz. In order to provide optimal system power management, the stereo ADC can be
powered up one channel at a time, to support the case where only mono record capability is required. In
addition, both channels can be fully powered or entirely powered down. Because of the oversampling
nature of the audio ADC and the integrated digital decimation filtering, requirements for analog
anti-aliasing filtering are very relaxed. The TLV320AIC3254 integrates a second order analog anti-aliasing
filter with 28-dB attenuation at 6MHz. This filter, combined with the digital decimation filter, provides
sufficient anti-aliasing filtering without requiring additional external components.
5.7.2
Routing
As shown in Figure 5-2, the TLV320AIC3254 includes six analog inputs which can be configured as either
3 stereo single-ended pairs or 3 fully-differential pairs. These pins connect through series resistors and
switches to the virtual ground terminals of two fully-differential amplifiers (one per ADC/PGA channel). By
turning on only one set of switches per amplifier at a time, the inputs can be effectively multiplexed to
each ADC PGA channel. By turning on multiple sets of switches per amplifier at a time, audio sources can
be mixed. The TLV320AIC3254 supports the ability to mix up to four single-ended analog inputs or up to
two fully-differential analog inputs into each ADC PGA channel.
In most applications, high input impedance is desired for analog inputs. However when used in
conjunction with high gain as in the case of microphone inputs, the higher input impedance results in
higher noise or lower dynamic range. The TLV320AIC3254 allows the user the flexibility of choosing the
input impedance from 10kΩ, 20kΩ and 40kΩ. When multiple inputs are mixed together, by choosing
different input impedances, level adjustment can be achieved. For example, if one input is selected with
10kΩ input impedance and the second input is selected with 20kΩ input impedance, then the second input
is attenuated by half as compared to the first input. Note that this input level control is not intended to be a
volume control, but instead used occasionally for level setting.
Mixing of multiple inputs can easily lead to PGA outputs that exceed the range of the internal amplifiers,
resulting in saturation and clipping of the mixed output signal. Whenever mixing is being implemented, the
system designer is advised to take adequate precautions to avoid such a saturation from occurring. In
general, the mixed signal should not exceed 0dB.
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Typically, voice or audio signal inputs are capacitively coupled to the device. This allows the device to
independently set the common mode of the input signals to values chosen by register control of Page 1,
Register 10, D(6) to either 0.9V or 0.75V. The correct value maximizes the dynamic range across the
entire analog-supply range. Failure to capacitively connect the input to the device can cause high offset
due to mismatch in source common-mode and device common-mode setting. In extreme cases it could
also saturate the analog channel, causing distortion.
5.8 ADC Gain Setting
Input
Selection
Digital
Volume
Control
Analog
Gain
Digital
Gain
Adjust
Frequency
Response/
Gain
Audio
Interface
Analog
In
ADC
Filtering
PGA
ADC
0, -6, -12 dB
0...47.5 dB
Step = 0.5 dB
Fully
-12...20 dB
0…-0.4 dB
Programmable
Step = 0.5 dB Step = 0.1 dB Coefficients
When the gain of the ADC Channel is kept at 0dB and the common mode set to 0.75V, a single-ended
input of 0.375VRMS results in a full-scale digital signal at the output of ADC channel. Similarly, when the
gain is kept at 0dB, and common mode is set to 0.9V, a single-ended input of 0.5VRMS results in a
full-scale digital signal at the output of the ADC channel. However various block functions control the gain
through the channel. The gain applied by the PGA is described in Table 5-1. Additionally, the digital
volume control adjusts the gain through the channel as described in Section 5.8.2. A finer level of gain is
controlled by fine gain control as described in Section 5.8.3. The decimation filters A, B and C along with
the delta-sigma modulator contribute to a DC gain of 1.0 through the channel.
5.8.1
Analog Programmable Gain Amplifier (PGA)
The TLV320AIC3254 features a built-in low-noise PGA for boosting low-level signals, such as direct
microphone inputs, to full-scale to achieve high SNR. This PGA can provide a gain in the range of 0dB to
47.5dB for single-ended inputs or 6dB to 53.5dB for fully-differential inputs (gain calculated w.r.t. input
impedance setting of 10kΩ, 20kΩ input impedance will result in 6dB lower and 40kΩ will result in 12dB
lower gain). This gain can be user controlled by writing to Page 1, Register 59 and Page 1, Register 60. In
the AGC mode this gain can also be automatically controlled by the built-in hardware AGC.
Table 5-1. Analog PGA vs Input Configuration
Page 1,
Register 59, D(6:0)
Page 1,
Register 60, D(6:0)
EFFECTIVE GAIN APPLIED BY PGA
SINGLE-ENDED
DIFFERENTIAL
RIN = 10K
RIN = 20K RIN = 40K
RIN =
10K
RIN =
20K
RIN = 40K
000 0000
0 dB
–6 dB
-12 dB
6.0 dB
0 dB
–6.0 dB
000 0001
0.5 dB
–5.5 dB
–11.5 dB
6.5 dB
0.5 dB
-5.5 dB
000 0010
1.0 dB
–5.0 dB
–11.0 dB
7.0 dB
7.5 dB
–5.0 dB
…
…
…
…
…
…
…
101 1110
47.0 dB
41.0 dB
35.0 dB
53.0 dB
47.0 dB
41.0 dB
101 1111
47.5 dB
41.5 dB
35.5 dB
53.5 dB
47.5 dB
41.5 dB
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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The gain changes are implemented with an internal soft-stepping algorithm that only changes the actual
volume level by one 0.5-dB step every one or two ADC output samples, depending on the register value
(see registers Page 0, Reg 81, D(1:0)). This soft-stepping ensures that volume control changes occur
smoothly with no audible artifacts. On reset, the PGA gain defaults to a mute condition, and at power
down, the PGA soft-steps the volume to mute before shutting down. A read-only flag Page 0, Reg 36, D(7)
and D(3) is set whenever the gain applied by the PGA equals the desired value set by the register. The
soft-stepping control can also be disabled by programming Page 0, Reg 81, D(1:0).
5.8.2
Digital Volume Control
The TLV320AIC3254 also has a digital volume-control block with a range from -12dB to +20dB in steps of
0.5dB. It is set by programming Page 0, Register 83 and 84 respectively for left and right channels.
Table 5-2. Digital Volume Control for ADC
Desired Gain
dB
Left / Right Channel
Page 1, Register 83/84,
D(6:0)
–12.0
110 1000
–11.5
110 1001
–11.0
110 1010
..
–0.5
111 1111
0.0
000 0000 (Default)
+0.5
000 0001
..
+19.5
010 0111
+20.0
010 1000
During volume control changes, the soft-stepping feature is used to avoid audible artifacts. The
soft-stepping rate can be set to either 1 or 2 gain steps per sample. Soft-stepping can also be entirely
disabled. This soft-stepping is configured via Page 1, Register 81, D(1:0), and is common to soft-stepping
control for the analog PGA. During power-down of an ADC channel, this volume control soft-steps down to
-12.0dB before powering down. Due to the soft-stepping control, soon after changing the volume control
setting or powering down the ADC channel, the actual applied gain may be different from the one
programmed through the control register. The TLV320AIC3254 gives feedback to the user, through
read-only flags Page 1, Reg 36, D(7) for Left Channel and Page 1, Reg 36, D(3) for the right channel.
5.8.3
Fine Digital Gain Adjustment
Additionally, the gains in each of the channels is finely adjustable in steps of 0.1dB. This is useful when
trying to match the gain between channels. By programming Page 0, Register 82 the gain can be adjusted
from 0dB to -0.4dB in steps of 0.1dB. This feature, in combination with the regular digital volume control
allows the gains through the left and right channels be matched in the range of -0.5dB to +0.5dB with a
resolution of 0.1dB.
5.8.4
AGC
The TLV320AIC3254 includes Automatic Gain Control (AGC) for ADC recording. AGC can be used to
maintain a nominally-constant output level when recording speech. As opposed to manually setting the
PGA gain, in the AGC mode, the circuitry automatically adjusts the PGA gain as the input signal becomes
overly loud or very weak, such as when a person speaking into a microphone moves closer or farther from
the microphone. The AGC algorithm has several programmable parameters, including target gain, attack
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and decay time constants, noise threshold, and max PGA applicable, that allow the algorithm to be fine
tuned for any particular application. The algorithm uses the absolute average of the signal (which is the
average of the absolute value of the signal) as a measure of the nominal amplitude of the output signal.
Since the gain can be changed at the sample interval time, the AGC algorithm operates at the ADC
sample rate.
• Target Level represents the nominal output level at which the AGC attempts to hold the ADC output
signal level. The TLV320AIC3254 allows programming of eight different target levels, which can be
programmed from –5.5 dB to –24 dB relative to a full-scale signal. Since the TLV320AIC3254 reacts to
the signal absolute average and not to peak levels, it is recommended that the target level be set with
enough margin to avoid clipping at the occurrence of loud sounds.
• Attack Time determines how quickly the AGC circuitry reduces the PGA gain when the output signal
level exceeds the target level due to increase in input signal level. Wide range of attack time
programmability is supported in terms of number of samples (i.e. number of ADC sample frequency
clock cycles).
• Decay Time determines how quickly the PGA gain is increased when the output signal level falls
below the target level due to reduction in input signal level. Wide range of decay time programmability
is supported in terms of number of samples (i.e., number of ADC sample frequency clock cycles).
• Gain Hysteresis is the hysteresis applied to the required gain calculated by the AGC function while
changing its mode of operation from attack to decay or vice-versa. For example, while attacking the
input signal, if the current applied gain by the AGC is x dB, and suddenly because of input level going
down, the new calculated required gain is y dB, then this gain is applied provided y is greater than x by
the value set in Gain Hysteresis. This feature avoids the condition when the AGC function can fluctuate
between a very narrow band of gains leading to audible artifacts. The Gain Hysteresis can be adjusted
or disabled by the user.
• Noise threshold determines the level below which if the input signal level falls, the AGC considers it
as silence, and thus brings down the gain to 0 dB in steps of 0.5 dB every FS and sets the noise
threshold flag. The gain stays at 0 dB unless the input speech signal average rises above the noise
threshold setting. This ensures that noise is not 'gained up' in the absence of speech. Noise threshold
level in the AGC algorithm is programmable from -30dB to -90 dB of full-scale. When AGC Noise
Threshold is set to –70dB, –80db, or –90dB, the microphone input Max PGA applicable setting must
be greater than or equal to 11.5dB, 21.5dB, or 31.5dB respectively. This operation includes hysteresis
and debounce to avoid the AGC gain from cycling between high gain and 0 dB when signals are near
the noise threshold level. The noise (or silence) detection feature can be entirely disabled by the user.
• Max PGA applicable allows the designer to restrict the maximum gain applied by the AGC. This can
be used for limiting PGA gain in situations where environmental noise is greater than the programmed
noise threshold. Microphone input Max PGA can be programmed from 0 dB to 63.5 dB in steps of 0.5
dB.
• Hysteresis, as the name suggests, determines a window around the Noise Threshold which must be
exceeded to either detect that the recorded signal is indeed noise or signal. If initially the energy of the
recorded signal is greater than the Noise Threshold, then the AGC recognizes it as noise only when
the energy of the recorded signal falls below the Noise Threshold by a value given by Hysteresis.
Similarly, after the recorded signal is recognized as noise, for the AGC to recognize it as a signal, its
energy must exceed the Noise Threshold by a value given by the Hysteresis setting. In order to
prevent the AGC from jumping between noise and signal states, (which can happen when the energy
of recorded signal is very close to the Noise threshold) a non-zero hysteresis value should be chosen.
The Hysteresis feature can also be disabled.
• Debounce Time (Noise and Signal) determines the hysteresis in time domain for noise detection.
The AGC continuously calculates the energy of the recorded signal. If the calculated energy is less
than the set Noise Threshold, then the AGC does not increase the input gain to achieve the Target
Level. However, to handle audible artifacts which can occur when the energy of the input signal is very
close to the Noise Threshold, the AGC checks if the energy of the recorded signal is less than the
Noise Threshold for a time greater than the Noise Debounce Time. Similarly the AGC starts increasing
the input-signal gain to reach the Target Level when the calculated energy of the input signal is greater
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
•
•
•
•
•
www.ti.com
than the Noise Threshold. Again, to avoid audible artifacts when the input-signal energy is very close
to Noise Threshold, the energy of the input signal needs to continuously exceed the Noise Threshold
value for the Signal Debounce Time. If the debounce times are kept very small, then audible artifacts
can result by rapid enabling and disabling the AGC function. At the same time, if the Debounce time is
kept too large, then the AGC may take time to respond to changes in levels of input signals with
respect to Noise Threshold. Both noise and signal debounce time can be disabled.
The AGC Noise Threshold Flag is a read-only flag indicating that the input signal has levels lower
than the Noise Threshold, and thus is detected as noise (or silence). In such a condition the AGC
applies a gain of 0 dB.
Gain Applied by AGC is a ready-only register setting which gives a real-time feedback to the system
on the gain applied by the AGC to the recorded signal. This, along with the Target Setting, can be
used to determine the input signal level. In a steady state situation
Target Level (dB ) = Gain Applied by AGC (dB) + Input Signal Level (dB)
When the AGC noise threshold flag is set, then the status of gain applied by AGC should be ignored.
The AGC Saturation Flag is a read-only flag indicating that the ADC output signal has not reached its
Target Level. However, the AGC is unable to increase the gain further because the required gain is
higher than the Maximum Allowed PGA gain. Such a situation can happen when the input signal has
very low energy and the Noise Threshold is also set very low. When the AGC noise threshold flag is
set, the status of AGC saturation flag should be ignored.
The ADC Saturation Flag is a read-only flag indicating an overflow condition in the ADC channel. On
overflow, the signal is clipped and distortion results. This typically happens when the AGC Target Level
is kept very high and the energy in the input signal increases faster than the Attack Time.
An AGC low-pass filter is used to help determine the average level of the input signal. This average
level is compared to the programmed detection levels in the AGC to provide the correct functionality.
This low pass filter is in the form of a first-order IIR filter. Three 8-bit registers are used to form the
24-bit digital coefficient as shown on the register map. In this way, a total of 9 registers are
programmed to form the 3 IIR coefficients. The transfer function of the filter implemented for signal
level detection is given by
H( z) =
N0 + N1z -1
2 23 - D1z -1
(5-1)
Where:
Coefficient N0 can be programmed by writing into Page 8, Register 12, 13 and 14.
Coefficient N1 can be programmed by writing into Page 8, Register 16, 17 and 18.
Coefficient D1 can be programmed by writing into Page 8, Register 20, 21 and 22.
N0, N1 and D1 are 24-bit 2’s complement numbers and their default values implement a low-pass
filter with cut-off at 0.002735*ADC_FS .
See Table 5-3 for various AGC programming options. AGC can be used only if analog microphone
input is routed to the ADC channel.
Table 5-3. AGC Parameter Settings
Function
Control Register
Left ADC
Control Register
Right ADC
Bit
AGC enable
Page 0, Register 86
Page 0,Register 94
D(7)
Target Level
Page 0, Register 86
Page 0, Register 94
D(6:4)
Gain Hysteresis
Page 0, Register 86
Page 0, Register 94
D(1:0)
Hysteresis
Page 0, Register 87
Page 0, Register 95
D(7:6)
Noise threshold
Page 0, Register 87
Page 0, Register 95
D(5:1)
Max PGA applicable
Page 0, Register 88
Page 0, Register 96
D(6:0)
Time constants (attack time)
Page 0, Register 89
Page 0, Register 97
D(7:0)
Time constants(decay time)
Page 0, Register 90
Page 0, Register 98
D(7:0)
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Table 5-3. AGC Parameter Settings (continued)
Function
Control Register
Left ADC
Control Register
Right ADC
Bit
Debounce time (Noise)
Page 0, Register 91
Page 0, Register 99
D(4:0)
Debounce time (Signal)
Page 0, Register 92
Page 0, Register 100
D(3:0)
Gain applied by AGC
Page 0, Register 93
Page 0, Register 101
D(7:0) (Read Only)
AGC Noise Threshold Flag
Page 0, Register 45 (sticky flag),
Page 0, Register 47 (non-sticky flag)
Page 0, Register 45 (sticky flag),
Page 0, Register 47 (non-sticky
flag)
D(6:5) (Read Only)
AGC Saturation flag
Page 0, Register 36 (sticky flag)
Page 0, Register 36 (sticky flag)
D(5), D(1) (Read Only)
ADC Saturation flag
Page 0, Register 42 (sticky flag),
Page 0, Register 43 (non-sticky flag)
Page 0, Register 42 (sticky flag),
Page 0, Register 43 (non-sticky
flag)
D(3:2) (Read Only)
Input
Signal
Output
Signal
Target
Level
AGC
Gain
Decay Time
Attack
Time
Figure 5-3. AGC Characteristics
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5.9 ADC Decimation Filtering and Signal Processing
The TLV320AIC3254 ADC channel includes a built-in digital decimation filter to process the oversampled
data from the sigma-delta modulator to generate digital data at Nyquist sampling rate with high dynamic
range. The decimation filter can be chosen from three different types, depending on the required
frequency response, group delay and sampling rate.
5.9.1
Processing Blocks
The TLV320AIC3254 offers a range of processing blocks which implement various signal processing
capabilities along with decimation filtering. These processing blocks give users the choice of how much
and what type of signal processing they may use and which decimation filter is applied.
The choice between these processing blocks is part of the PowerTune strategy to balance power
conservation and signal-processing flexibility. Less signal-processing capability reduces the power
consumed by the device. Table 5-4 gives an overview of the available processing blocks of the ADC
channel and their properties. The Resource Class Column (RC) gives an approximate indication of power
consumption.
The signal processing blocks available are:
• First-order IIR
• Scalable number of biquad filters
• Variable-tap FIR filter
• AGC
The processing blocks are tuned for common cases and can achieve high anti-alias filtering or low-group
delay in combination with various signal processing effects such as audio effects and frequency shaping.
The available first order IIR, BiQuad and FIR filters have fully user programmable coefficients.
Table 5-4. ADC Processing Blocks
Processing
Blocks
Channel
Decimation
Filter
1st Order
IIR Available
Number
BiQuads
FIR
Required
AOSR Value
Resource
Class
PRB_R1
Stereo
A
Yes
0
No
128,64
6
PRB_R2
Stereo
A
Yes
5
No
128,64
8
PRB_R3
Stereo
A
Yes
0
25-Tap
128,64
8
PRB_R4
Right
A
Yes
0
No
128,64
3
PRB_R5
Right
A
Yes
5
No
128,64
4
PRB_R6
Right
A
Yes
0
25-Tap
128,64
4
PRB_R7
Stereo
B
Yes
0
No
64
3
PRB_R8
Stereo
B
Yes
3
No
64
4
46
PRB_R9
Stereo
B
Yes
0
20-Tap
64
4
PRB_R10
Right
B
Yes
0
No
64
2
PRB_R11
Right
B
Yes
3
No
64
2
PRB_R12
Right
B
Yes
0
20-Tap
64
2
PRB_R13
Right
C
Yes
0
No
32
3
PRB_R14
Stereo
C
Yes
5
No
32
4
PRB_R15
Stereo
C
Yes
0
25-Tap
32
4
PRB_R16
Right
C
Yes
0
No
32
2
PRB_R17
Right
C
Yes
5
No
32
2
PRB_R18
Right
C
Yes
0
25-Tap
32
2
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5.9.2
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Processing Blocks – Details
5.9.2.1 1st order IIR, AGC, Filter A
From Delta-Sigma
Modulator or
Digital Microphone
Filter A
AGC
Gain
Compen
Sation
st
1 Order
IIR
´
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-4. Signal Chain for PRB_R1 and PRB_R4
5.9.2.2 5 Biquads, 1st order IIR, AGC, Filter A
From Delta-Sigma
Modulator or
Digital Microphone
HA
Filter A
HB
HC
HD
HE
´
st
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-5. Signal Chain PRB_R2 and PRB_R5
5.9.2.3 25 Tap FIR, 1st order IIR, AGC, Filter A
From Delta-Sigma
Modulator or
Digital Microphone
st
Filter A
´
25-Tap FIR
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-6. Signal Chain for PRB_R3 and PRB_R6
5.9.2.4 1st order IIR, AGC, Filter B
From Delta-Sigma
Modulator or
Digital Microphone
st
Filter B
´
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-7. Signal Chain for PRB_R7 and PRB_R10
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5.9.2.5 3 Biquads, 1st order IIR, AGC, Filter B
From Delta-Sigma
Modulator or
Digital Microphone
HA
Filter B
HB
HC
AGC
Gain
Compen
sation
1stOrder
IIR
´
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-8. Signal Chain for PRB_R8 and PRB_R11
5.9.2.6 20 Tap FIR, 1st order IIR, AGC, Filter B
From Delta-Sigma
Modulator or
Digital Microphone
AGC
Gain
Compen
sation
st
20-Tap FIR
Filter B
´
1 Order
IIR
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-9. Signal Chain for PRB_R9 and PRB_R12
5.9.2.7 1st order IIR, AGC, Filter C
From Delta-Sigma
Modulator or
Digital Microphone
Filter C
´
st
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-10. Signal Chain for PRB_R13 and PRB_R16
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5.9.2.8 5 Biquads, 1st order IIR, AGC, Filter C
From Delta-Sigma
Modulator or
Digital Microphone
HA
Filter C
HB
HC
HD
HE
´
st
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-11. Signal Chain for PRB_R14 and PRB_R17
5.9.2.9 25 Tap FIR, 1st order IIR, AGC, Filter C
From Delta-Sigma
Modulator or
Digital Microphone
st
Filter C
´
25-Tap FIR
1 Order
IIR
AGC
Gain
Compen
sation
To Audio
Interface
AGC
From
Digital Vol. Ctrl
To Analog PGA
Figure 5-12. Signal for PRB_R15 and PRB_R18
5.9.3
User Programmable Filters
Depending on the selected processing block, different types and orders of digital filtering are available. A
1st-order IIR filter is always available, and is useful to efficiently filter out possible DC components of the
signal. Up to 5 biquad section or alternatively up to 25-tap FIR filters are available for specific processing
blocks. The coefficients of the available filters are arranged as sequentially indexed coefficients in two
banks. If adaptive filtering is chosen, the coefficient banks can be switched on-the-fly. For more details on
adaptive filtering see Section 5.10.7 below.
The coefficients of these filters are each 24-bits wide, in two's-complement and occupy 3 consecutive 8-bit
registers in the register space. For default values please see .
5.9.3.1 1st Order IIR Section
The transfer function for the first order IIR Filter is give by [equation not in source]
H( z) =
N0 + N1z -1
2 23 - D1z -1
(5-2)
st
The frequency response for the 1 order IIR Section with default coefficients is flat at a gain of 0dB.
Table 5-5. ADC 1st order IIR Filter Coefficients
Filter
1st Order
IIR
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FIlter
Coefficient
ADC Coefficient Left
Channel
ADC Coefficient Right Channel
N0
C4 (Pg 8,Reg 24,25,26)
C36 (Pg 9,Reg 32,33,34)
N1
C5 (Pg 8,Reg 28,29,30)
C37 (Pg 9,Reg 36,37,38)
D1
C6 (Pg 8,Reg 32,33,34)
C39 (Pg 9,Reg 40,41,42)
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5.9.3.2 Biquad Section
The transfer function of each of the Biquad Filters is given by
H( z ) =
N0 + 2 * N1z -1 + N2 z -2
2 23 - 2 * D1z -1 - D 2 z -2
(5-3)
The frequency response for each of the biquad section with default coefficients is flat at a gain of 0dB.
Table 5-6. ADC Biquad Filter Coefficients
Filter
FIlter
Coefficient
BIQUAD A
BIQUAD B
BIQUAD C
BIQUAD D
BIQUAD E
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ADC Coefficient Left
Channel
ADC Coefficient Right Channel
N0
C7 (Pg 8, Reg 36,37,38)
C39 (Pg 9, Reg 44,45,46)
N1
C8 (Pg 8, Reg 40,41,42)
C40 (Pg 9, Reg 48,49,50)
N2
C9 (Pg 8, Reg 44,45,46)
C41 (Pg 9, Reg 52,53,54)
D1
C10 (Pg 8, Reg 48,49,50)
C42 (Pg 9, Reg 56,57,58)
D2
C11 (Pg 8, Reg 52,53,54)
C43 (Pg 9, Reg 60,61,62)
N0
C12 (Pg 8, Reg 56,57,58)
C44 (Pg 9, Reg 64,65,66)
N1
C13 (Pg 8, Reg 60,61,62)
C45 (Pg 9, Reg 68,69,70)
N2
C14 (Pg 8, Reg 64,65,66)
C46 (Pg 9, Reg 72,73,74)
D1
C15 (Pg 8, Reg 68,69,70)
C47 (Pg 9, Reg 76,77,78)
D2
C16 (Pg 8, Reg 72,73,74)
C48 (Pg 9, Reg 80,81,82)
N0
C17 (Pg 8, Reg 76,77,78)
C49 (Pg 9, Reg 84,85,86)
N1
C18 (Pg 8, Reg 80,81,82)
C50 (Pg 9, Reg 88,89,90)
N2
C19 (Pg 8, Reg 84,85,86)
C51 (Pg 9, Reg 92,93,94)
D1
C20 (Pg 8, Reg 88,89,90)
C52 (Pg 9, Reg 96,97,98)
D2
C21 (Pg 8, Reg 92,93,94)
C53 (Pg 9, Reg 100,101,102)
N0
C22 (Pg 8, Reg 96,97,98)
C54 (Pg 9, Reg 104,105,106)
N1
C23 (Pg 8, Reg 100,101,102)
C55 (Pg 9, Reg 108,109,110)
N2
C24 (Pg 8, Reg 104,105,106)
C56 (Pg 9, Reg 112,113,114)
D1
C25 (Pg 8, Reg 108,109,110)
C57 (Pg 9, Reg 116,117,118)
D2
C26 (Pg 8, Reg 112,113,114)
C58 (Pg 9, Reg 120,121,122)
N0
C27 (Pg 8, Reg 116,117,118)
C59 (Pg 9, Reg 124,125,126)
N1
C28 (Pg 8, Reg 120,121,122)
C60 (Pg 10, Reg 8,9,10)
N2
C29 (Pg 8, Reg 124,125,126)
C61 (Pg 10, Reg 12,13,14)
D1
C30 (Pg 9, Reg 8,9,10)
C62 (Pg 10, Reg 16,17,18)
D2
C31 (Pg 9, Reg 12,13,14)
C63 (Pg 10, Reg 20,21,22)
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5.9.3.3 FIR Section
Six of the available ADC processing blocks offer FIR filters for signal processing. PRB_R9 and PRB_R12
feature a 20-tap FIR filter while the processing blocks PRB_R3, PRB_R6, PRB_R15 and PRB_R18
feature a 25-tap FIR filter
M
H( z ) =
å Firn z -n
n =0
M = 24, for PRB_R3, PRB_R6, PRB_R15 and PRB_R18
M = 19, for PRB_R9 and PRB_R12
(5-4)
The coefficients of the FIR filters are 24-bit 2’s complement format and correspond to the ADC coefficient
space as listed below. There is no default transfer function for the FIR filter. When the FIR filter gets used
all applicable coefficients must be programmed.
Table 5-7. ADC FIR Filter Coefficients
5.9.4
Filter
FIlter Coefficient Left ADC
Channel
Filter Coefficient Right ADC Channel
Fir0
C7 (Pg 8, Reg 36,37,38)
C39 (Pg 9, Reg 44,45,46)
Fir1
C8 (Pg 8, Reg 40,41,42)
C40 (Pg 9, Reg 48,49,50)
Fir2
C9 (Pg 8, Reg 44,45,46)
C41 (Pg 9, Reg 52,53,54)
Fir3
C10 (Pg 8, Reg 48,49,50)
C42 (Pg 9, Reg 56,57,58)
Fir4
C11 (Pg 8, Reg 52,53,54)
C43 (Pg 9, Reg 60,61,62)
Fir5
C12 (Pg 8, Reg 56,57,58)
C44 (Pg 9, Reg 64,65,66)
Fir6
C13 (Pg 8, Reg 60,61,62)
C45 (Pg 9, Reg 68,69,70)
Fir7
C14 (Pg 8, Reg 64,65,66)
C46 (Pg 9, Reg 72,73,74)
Fir8
C15 (Pg 8, Reg 68,69,70)
C47 (Pg 9, Reg 76,77,78)
Fir9
C16 (Pg 8, Reg 72,73,74)
C48 (Pg 9, Reg 80,81,82)
Fir10
C17 (Pg 8, Reg 76,77,78)
C49 (Pg 9, Reg 84,85,86)
Fir11
C18 (Pg 8, Reg 80,81,82)
C50 (Pg 9, Reg 88,89,90)
Fir12
C19 (Pg 8, Reg 84,85,86)
C51 (Pg 9, Reg 92,93,94)
Fir13
C20 (Pg 8, Reg 88,89,90)
C52 (Pg 9, Reg 96,97,98)
Fir14
C21 (Pg 8, Reg 92,93,94)
C53 (Pg 9, Reg 100,101,102)
Fir15
C22 (Pg 8, Reg 96,97,98)
C54 (Pg 9, Reg 104,105,106)
Fir16
C23 (Pg 8, Reg 100,101,102)
C55 (Pg 9, Reg 108,109,110)
Fir17
C24 (Pg 8, Reg 104,105,106)
C56 (Pg 9, Reg 112,113,114)
Fir18
C25 (Pg 8, Reg 108,109,110)
C57 (Pg 9, Reg 116,117,118)
Fir19
C26 (Pg 8, Reg 112,113,114)
C58 (Pg 9, Reg 120,121,122)
Fir20
C27 (Pg 8, Reg 116,117,118)
C59 (Pg 9, Reg 124,125,126)
Fir21
C28 (Pg 8, Reg 120,121,122)
C60 (Pg 10, Reg 8,9,10)
Fir22
C29 (Pg 8, Reg 124,125,126)
C61 (Pg 10, Reg 12,13,14)
Fir23
C30 (Pg 9, Reg 8,9,10)
C62 (Pg 10, Reg 16,17,18)
Fir24
C31 (Pg 9, Reg 12,13,14)
C63 (Pg 10, Reg 20,21,22)
Decimation Filter
The TLV320AIC3254 offers 3 different types of decimation filters. The integrated digital decimation filter
removes high-frequency content and down samples the audio data from an initial sampling rate of
AOSR*Fs to the final output sampling rate of Fs. The decimation filtering is achieved using a higher-order
CIC filter followed by linear-phase FIR filters. The decimation filter cannot be chosen by itself, it is implicitly
set through the chosen processing block.
The following subsections describe the properties of the available filters A, B and C.
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5.9.4.1 Decimation Filter A
This filter is intended for use at sampling rates up to 48kHz. When configuring this filter, the oversampling
ratio of the ADC can either be 128 or 64. For highest performance the oversampling ratio must be set to
128. Please also refer to the PowerTune chapter for details on performance and power in dependency of
AOSR.
Filter A can also be used for 96kHz at an AOSR of 64.
Table 5-8. ADC Decimation Filter A, Specification
Parameter
Condition
Value (Typical)
Units
Filter Gain Pass Band
0…0.39 Fs
0.062
dB
Filter Gain Stop Band
0.55…64Fs
–73
dB
AOSR = 128
Filter Group Delay
17/Fs
Sec.
Pass Band Ripple, 8 ksps
0…0.39 Fs
0.062
dB
Pass Band Ripple, 44.1 ksps
0…0.39 Fs
0.05
dB
Pass Band Ripple, 48 ksps
0…0.39 Fs
0.05
dB
Filter Gain Pass Band
0…0.39 Fs
0.062
dB
Filter Gain Stop Band
0.55…32Fs
–73
dB
17/Fs
Sec.
AOSR = 64
Filter Group Delay
Pass Band Ripple, 8 ksps
0…0.39 Fs
0.062
dB
Pass Band Ripple, 44.1 ksps
0…0.39 Fs
0.05
dB
Pass Band Ripple, 48 ksps
0…0.39 Fs
0.05
dB
Pass Band Ripple, 96 ksps
0…20kHz
0.1
dB
ADC Channel Response for Decimation Filter A
(Red line corresponds to -73 dB)
0
-10
Magnitude - dB
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
0.2
0.4 0.6 0.8
1 1.2 1.4 1.6 1.8
Frequency Normalized w.r.t. FS
2
Figure 5-13. ADC Decimation Filter A, Frequency Response
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5.9.4.2 Decimation Filter B
Filter B is intended to support sampling rates up to 96kHz at a oversampling ratio of 64.
Table 5-9. ADC Decimation Filter B, Specifications
Parameter
Condition
Value (Typical)
Units
Filter Gain Pass Band
0…0.39Fs
±0.077
dB
Filter Gain Stop Band
0.60Fs…32Fs
–46
dB
11/Fs
Sec.
AOSR = 64
Filter Group Delay
Pass Band Ripple, 8 ksps
0…0.39Fs
0.076
dB
Pass Band Ripple, 44.1 ksps
0…0.39Fs
0.06
dB
Pass Band Ripple, 48 ksps
0…0.39Fs
0.06
dB
Pass Band Ripple, 96 ksps
0…20kHz
0.11
dB
0
ADC Channel Response for Decimation Filter A
(Red line corresponds to -44 dB)
-10
Magnitude - dB
-20
-30
-40
-50
-60
-70
-80
-90
0
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
Frequency Normalized w.r.t. FS
2
Figure 5-14. ADC Decimation Filter B, Frequency Response
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5.9.4.3 Decimation Filter C
Filter type C along with AOSR of 32 is specially designed for 192ksps operation for the ADC. The pass
band which extends up to 0.11*Fs ( corresponds to 21kHz), is suited for audio applications.
Table 5-10. ADC Decimation Filter C, Specifications
Parameter
Condition
Value (Typical)
Units
Filter Gain from 0 to 0.11Fs
0…0.11Fs
±0.033
dB
Filter Gain from 0.28Fs to 16Fs
0.28Fs…16Fs
–60
dB
11/Fs
Sec.
Filter Group Delay
Pass Band Ripple, 8 ksps
0…0.11Fs
0.033
dB
Pass Band Ripple, 44.1 ksps
0…0.11Fs
0.033
dB
Pass Band Ripple, 48 ksps
0…0.11Fs
0.032
dB
Pass Band Ripple, 96 ksps
0…0.11Fs
0.032
dB
Pass Band Ripple, 192 ksps
0…20kHz
0.086
dB
0
ADC Channel Response for Decimation Filter C
(Red line corresponds to -60 dB)
Magnitude - dB
-20
-40
-60
-80
-100
-120
0
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
Frequency Normalized w.r.t. FS
2
Figure 5-15. ADC Decimation Filter C, Frequency Response
5.9.5
ADC Data Interface
The decimation filter and signal processing block in the ADC channel passes 32-bit data words to the
audio serial interface once every cycle of Fs,ADC. During each cycle of Fs,ADC, a pair of data words ( for
left and right channel ) are passed. The audio serial interface rounds the data to the required word length
of the interface before converting to serial data as per the different modes for audio serial interface.
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5.10 ADC Special Functions
5.10.1 Microphone Bias
The TLV320AIC3254 has a built-in low noise Microphone Bias support for electret-condenser
microphones. The Bias amplifier can support up to 3mA of load current to support multiple microphones.
The Bias amplifier has been designed to provide a combination of high PSRR, low noise and
programmable bias voltages to allow the user to fine tune the biasing to specific microphone
combinations. To support a wide range of bias voltages, the bias amplifier can work of either a low analog
supply or high LDOIN supply.
Table 5-11. MICBIAS Voltage Control
Page 1, Reg 51, D(5:4)
Page 1, Reg 10, D(6)
Page 1, Reg 51, D(3)
MICBIAS Voltage (without load)
00
0
X
1.0V
00
1
X
1.25V
01
0
X
1.4V
01
1
X
1.7V
10
0
1
2.1V
10
1
1
2.5V
11
X
0
AVdd
11
X
1
LDOIN
5.10.2 Digital Microphone Function
In addition to supporting analog microphones, the TLV320AIC3254 also interfaces to digital microphones.
Σ-Δ
DIG_MIC_IN
LEFT ADC
CIC FILTER
Signal
Processing
Blocks
Σ-Δ
RIGHT ADC
CIC FILTER
ADC_MOD_CLK
MISO
GPIO
DIN
SCLK
Figure 5-16. Digital Microphone in TLV320AIC3254
The TLV320AIC3254 outputs internal clock ADC_MOD_CLK on GPIO pin ( Page 0, Register 51, D(5:2))
or MISO pin (Page 0, Register 55, D(4:1)). This clock can be connected to the external digital microphone
device. The single-bit output of the external digital microphone device can be connected to GPIO, DIN or
SCLK pins. Internally the TLV320AIC3254 latches the steady value of data on the rising edge of
ADC_MOD_CLK for the Left ADC channel, and the steady value of data on falling edge for the Right ADC
channel.
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ADC_MOD_CLK
DIG_MIC_IN
LEFT
RIGHT
RIGHT
LEFT
LEFT
RIGHT
Figure 5-17. Timing Diagram for Digital Microphone Interface
The digital-microphone mode can be selectively enabled for only-left, only-right, or stereo channels. When
the digital microphone mode is enabled, the analog section of the ADC can be powered down and
bypassed for power efficiency. The AOSR value for the ADC channel must be configured to select the
desired decimation ratio to be achieved based on the external digital microphone properties.
5.10.3 Channel-to-Channel Phase Adjustment
The TLV320AIC3254 has a built-in feature to fine-adjust the phase between the stereo ADC record
signals. The phase compensation is particularly helpful to adjust delays when using dual microphones for
noise cancellation etc.
This delay can be controlled in fine amounts in the following fashion.
Delay(7:0) = Page 0/Register 85/D(7:0)
Where
RIGHT _ ADC _ PHASE _ COMP ( t ) = RIGHT _ ADC _ OUT( t - t pr )
(5-5)
where
t pr =
(Delay( 4 : 0) + Delay(6 : 5) * AOSR * k f )
AOSR * ADC _ FS
Where kf is a function of the decimation filter:
Decimation Filter Type
kf
A
0.25
B
0.5
C
1
and
LEFT _ ADC _ PHASE _ COMP ( t ) = LEFT _ ADC _ OUT ( t - t pl )
(5-6)
Where
t pl =
Delay (7)
AOSR * ADC _ FS
(5-7)
5.10.4 DC Measurement
The TLV320AIC3254 supports a highly flexible DC measurement feature using the high resolution
oversampling and noise-shaping ADC. This mode can be used when the particular ADC channel is not
used for the voice/audio record function. This mode can be enabled by programming Page 0, Register
102, D(7:6). The converted data is 24-bits, using 2.22 numbering format. The value of the converted data
for the left-channel ADC can be read back from Page 0, Register 104-106 and for the right-channel ADC
from Page 0, Register 107-109. Before reading back the converted data, Page 0, Register 103, D(7:6)
must be programmed to latch the converted data into the read-back register. After the converted data is
read back, Page 0, Register 103, D(7:6) must be reset to 00 immediately. In DC measurement mode, two
measurement methods are supported.
Mode A
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In DC-measurement mode A, a variable-length averaging filter is used. The length of the averaging filter
D, can be programmed from 1 to 20 by programming Page 0, Register 100, D(4:0). To choose mode A,
Page 0, Register 102, D(5) must be programmed to 0.
Mode B
To choose mode B Page 0, Register 102, D(5) must be programmed to 1. In DC-measurement mode B, a
first-order IIR filter is used. The coefficients of this filter are determined by D, Page 0, Register 102,
D(4:0). The nature of the filter is given in the table below
Table 5-12. DC Measurement Bandwidth Settings
D:Page 0, Reg 102 , D(4:0)
–3 dB BW (kHz)
–0.5 dB BW (kHz)
1
688.44
236.5
2
275.97
96.334
3
127.4
44.579
4
61.505
21.532
5
30.248
10.59
6
15.004
5.253
7
7.472
2.616
8
3.729
1.305
9
1.862
652
10
931
326
11
465
163
12
232.6
81.5
13
116.3
40.7
14
58.1
20.3
15
29.1
10.2
16
14.54
5.09
17
7.25
2.54
18
3.63
1.27
19
1.8
0.635
20
0.908
0.3165
By programming Page 0, Reg 103, D(5) to ‘1’, the averaging filter is periodically reset after 2^R number of
ADC_MOD_CLK, where R is programmed in Page 0, Reg 103, D(4:0). When Page 0, Reg 103, D(5) is set
to 1 then the value of D should be less than the value of R. When Page 0, Reg 103, D(5) is programmed
as 0 the averaging filter is never reset.
5.10.5 Fast Charging AC Capacitors
The value of the coupling capacitor must be so chosen that the high-pass filter formed by the coupling
capacitor and the input impedance do not affect the signal content. At power-up, before proper recording
can begin, this coupling capacitor must be charged up to the common-mode voltage. To enable quick
charging, the TLV320AIC3254 has modes to speed up the charging of the coupling capacitor. These are
controlled by controlling Page 1, Register 71, D(5:0).
5.10.6 Anti Thump
For normal voice or audio recording, the analog input pins of the TLV320AIC3254, must be AC-coupled to
isolate the DC-common mode voltage of the driving circuit from the common-mode voltage of the
TLV320AIC3254.
When the analog inputs are not selected for any routing, the input pins are 3-stated and the voltage on the
pins is undefined. When the unselected inputs are selected for any routing, the input pins must charge
from the undefined voltage to the input common-mode voltage. This charging signal can cause audible
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artifacts. In order to avoid such artifacts the TLV320AIC3254 also incorporates anti-thump circuitry to allow
connection of unused inputs to the common-mode level. This feature is disabled by default, and can be
enabled by writing the appropriate value into Page 1, Register 58, D(7:2). The use of this feature in
combination with the PTM_R1 setting in Page 0, Register 61 when the ADC channel is powered down
causes the additional current consumption of 700µA from AVdd and 125µA from DVdd in the sleep mode.
5.10.7 Adaptive Filtering
After the ADC is running, the filter coefficients are locked and cannot be accessed for read or write.
However the TLV320AIC3254 offers an adaptive filter mode as well. Setting Register Page 8,Reg 1,
D(2)=1 turns on double buffering of the coefficients. In this mode filter coefficients can be updated through
the host and activated without stopping and restarting the ADC, enabling advanced adaptive filtering
applications.
To support double buffering, all coefficients are stored in two buffers (Buffer A and B). When the ADC is
running and adaptive filtering mode is turned on, setting the control bit Page 8, Reg 1,D(0)=1 switches the
coefficient buffers at the next start of a sampling period. The bit reverts to 0 after the switch occurs. At the
same time, the flag Page 8, Reg 1, D(1) toggles.
The flag in Page 8, Reg 1, D(1) indicates which of the two buffers is actually in use.
Page 8, Reg 1, D(1)=0: Buffer A is in use by the ADC engine, D(1)=1: Buffer B is in use.
While the device is running, coefficient updates are always made to the buffer not in use by the ADC,
regardless to which buffer the coefficients have been written
58
ADC running
Flag, Page 8, Reg 1, D(1)
Coefficient Buffer in use
Writing to
Will update
No
0
None
C4, Buffer A
C4, Buffer A
No
0
None
C4, Buffer B
C4, Buffer B
Yes
0
Buffer A
C4, Buffer A
C4, Buffer B
Yes
0
Buffer A
C4, Buffer B
C4, Buffer B
Yes
1
Buffer B
C4, Buffer A
C4, Buffer A
Yes
1
Buffer B
C4, Buffer B
C4, Buffer A
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5.11 ADC Setup
The following discussion is intended to guide a system designer through the steps necessary to configure
the TLV320AIC3254 ADC.
Step 1
The system clock source (master clock) and the targeted ADC sampling frequency must be identified.
Depending on the targeted performance, the decimation filter type (A, B or C) and OSR value can be
determined.
• Filter A with AOSR of 128 should be used for 48kHz high performance operation.
• Filter B with AOSR of 64 should be used for 96kHz operations.
In conjunction with a common mode setting of 0.75V and PTM_R1 this can also be used for 48kHz
PowerTune operation.
• Filter C with AOSR of 32 should be used for 192kHz operations
Based on the identified filter type and the required signal processing capabilities the appropriate
processing block can be determined from the list of available processing blocks (PRB_R1 to PRB_R18)
(See Table 5-4).
Based on the available master clock, the chosen OSR and the targeted sampling rate, the clock divider
values NADC and MADC can be determined. If necessary the internal PLL will add a large degree of
flexibility.
In summary, Codec_Clkin which is either derived directly from the system clock source or from the internal
PLL, divided by MADC, NADC and AOSR, must be equal to the ADC sampling rate ADC_FS. The
Clodec_Clkin clock signal is shared with the DAC clock generation block.
CODEC_CLKIN = NADC*MADC*AOSR*ADC_FS
To a large degree NADC and MADC can be chosen independently in the range of 1 to 128. In general
NADC should be as large as possible as long as the following condition can still be met:
MADC*AOSR/32 ≥ RC
RC is a function of the chosen processing block and is listed in the Table 5-4 Overview Processing Blocks
The common mode setting of the device is determined by the available analog power supply and the
desired PowerTune mode, this common mode setting is shared across ADC, DAC (input common mode)
and analog bypass path.
At this point the following device specific parameters are known:
PRB_Rx, AOSR, NADC, MADC, common mode setting
Additionally if the PLL is used the PLL parameters P, J, D and R are determined as well.
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Step 2
Setting up the device via register programming:
The following list gives a sequence of items that must be executed between powering the device up and
reading data from the device:
Define starting point:
Set register page to 0
Initiate SW Reset
Program Clock Settings
Program PLL clock dividers P,J,D,R (if PLL is necessary)
Power up PLL (if PLL is necessary)
Program and power up NADC
Program and power up MADC
Program OSR value
Program the processing block to be used
At this point, at the latest, analog power supply must be applied to the device ( via internal LDO or
external)
Program Analog Blocks
Set register Page to 1
Disable coarse AVdd generation
Enable Master Analog Power Control
Program Common Mode voltage
Program PowerTune (PTM) mode
Program MicPGA startup delay
Program Reference fast charging
Routing of inputs/common mode to ADC input
Unmute analog PGAs and set analog gain
Power Up ADC
Set register Page to 0
Power up ADC Channels
Unmute digital volume control
A detailed example can be found in Section 5.23.
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5.12 DAC
The TLV320AIC3254 includes a stereo audio DAC supporting data rates from 8kHz to 192kHz. Each
channel of the stereo audio DAC consists of a signal-processing engine with fixed processing blocks, a
programmable miniDSP, a digital interpolation filter, multi-bit digital delta-sigma modulator, and an analog
reconstruction filter. The DAC is designed to provide enhanced performance at low sampling rates through
increased oversampling and image filtering, thereby keeping quantization noise generated within the
delta-sigma modulator and signal images strongly suppressed within the audio band to beyond 20kHz. To
handle multiple input rates and optimize power dissipation and performance, the TLV320AIC3254 allows
the system designer to program the oversampling rates over a wide range from 1 to 1024 by configuring
the Page 0, Reg 13, and Reg 14. The system designer can choose higher oversampling ratios for lower
input data rates and lower oversampling ratios for higher input data rates.
The TLV320AIC3254 DAC channel includes a built-in digital interpolation filter to generate oversampled
data for the sigma delta modulator. The interpolation filter can be chosen from three different types
depending on required frequency response, group delay and sampling rate.
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5.12.1 Processing Blocks
The TLV320AIC3254 implements signal processing capabilities and interpolation filtering via processing
blocks. These fixed processing blocks give users the choice of how much and what type of signal
processing they may use and which interpolation filter is applied.
The choice between these processing blocks is part of the PowerTune strategy balancing power
conservation and signal processing flexibility. Less signal processing capability will result in less power
consumed by the device. The Table 5-13 gives an overview over all available processing blocks of the
DAC channel and their properties. The Resource Class Column (RC) gives an approximate indication of
power consumption.
The signal processing blocks available are:
• First-order IIR
• Scalable number of biquad filters
• 3D – Effect
• Beep Generator
The processing blocks are tuned for common cases and can achieve high image rejection or low group
delay in combination with various signal processing effects such as audio effects and frequency shaping.
The available first-order IIR and biquad filters have fully user-programmable coefficients.
Table 5-13. Overview – DAC Predefined Processing Blocks
62
Processing
Block No.
Interpolation
Filter
Channel
1st Order
IIR Available
Number
of
Biquads
DRC
3D
Beep
Generator
PRB_P1
A
PRB_P2
A
Stereo
No
Stereo
Yes
PRB_P3
PRB_P4
A
Stereo
A
Left
PRB_P5
A
PRB_P6
3
No
No
No
8
6
Yes
No
No
12
Yes
6
No
No
No
10
No
3
No
No
No
4
Left
Yes
6
Yes
No
No
6
A
Left
Yes
6
No
No
No
6
PRB_P7
B
Stereo
Yes
0
No
No
No
6
PRB_P8
B
Stereo
No
4
Yes
No
No
8
PRB_P9
B
Stereo
No
4
No
No
No
8
PRB_P10
B
Stereo
Yes
6
Yes
No
No
10
PRB_P11
B
Stereo
Yes
6
No
No
No
8
PRB_P12
B
Left
Yes
0
No
No
No
3
PRB_P13
B
Left
No
4
Yes
No
No
4
PRB_P14
B
Left
No
4
No
No
No
4
PRB_P15
B
Left
Yes
6
Yes
No
No
6
PRB_P16
B
Left
Yes
6
No
No
No
4
PRB_P17
C
Stereo
Yes
0
No
No
No
3
PRB_P18
C
Stereo
Yes
4
Yes
No
No
6
PRB_P19
C
Stereo
Yes
4
No
No
No
4
PRB_P20
C
Left
Yes
0
No
No
No
2
PRB_P21
C
Left
Yes
4
Yes
No
No
3
PRB_P22
C
Left
Yes
4
No
No
No
2
PRB_P23
A
Stereo
No
2
No
Yes
No
8
PRB_P24
A
Stereo
No
5
Yes
Yes
No
12
PRB_P25
A
Stereo
No
5
Yes
Yes
Yes
12
Application Information
RC Class
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5.12.2 Processing Blocks – Details
5.12.2.1 3 Biquads, Filter A
BiQuad
A
from
Interface
BiQuad
B
BiQuad
C
Interp.
Filter A
´
to
Modulator
Digital
Volume
Ctrl
Figure 5-18. Signal Chain for PRB_P1 and PRB_P4
5.12.2.2 6 Biquads, 1st order IIR, DRC, Filter A or B
IIR
from
Interface
BiQuad
A
BiQuad
B
BiQuad
C
BiQuad
D
BiQuad
E
Interp.
Filter
A,B
BiQuad
F
HPF
´
to
Modulator
Digital
Volume
Ctrl
DRC
Figure 5-19. Signal Chain for PRB_P2, PRB_P5, PRB_P10 and PRB_P15
5.12.2.3 6 Biquads, 1st order IIR, Filter A or B
BiQuad
A
IIR
from
Interface
BiQuad
B
BiQuad
C
BiQuad
D
BiQuad
E
BiQuad
F
Interp.
Filter
A,B
to
Modulator
´
Digital
Volume
Ctrl
Figure 5-20. Signal Chain for PRB_P3, PRB_P6, PRB_P11 and PRB_P16
5.12.2.4 IIR, , Filter B or C
IIR
from
Interface
Interp.
Filter
B,C
´
to
Modulator
Digital
Volume
Ctrl
Figure 5-21. Signal Chain for PRB_P7, PRB_P12, PRB_P17 and PRB_P20
5.12.2.5 4 Biquads, DRC, Filter B
from
Interface
BiQuad
A
BiQuad
B
BiQuad
C
BiQuad
D
Interp.
Filter B
HPF
´
DRC
to
Modulator
Digital
Volume
Ctrl
Figure 5-22. Signal Chain for PRB_P8 and PRB_P13
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5.12.2.6 4 Biquads, Filter B
BiQuad
A
BiQuad
B
from
Interface
BiQuad
C
BiQuad
D
Interp.
Filter B
´
to
Modulator
Digital
Volume
Ctrl
Figure 5-23. Signal Chain for PRB_P9 and PRB_P14
5.12.2.7 4 Biquads, 1st order IIR, DRC, Filter B
BiQuad
A
IIR
BiQuad
B
BiQuad
C
Interp.
Filter C
BiQuad
D
´
from
Interface
HPF
to
Modulator
Digital
Volume
Ctrl
DRC
Figure 5-24. Signal Chain for PRB_P18 and PRB_P21
5.12.2.8 4 Biquads, 1st order IIR, Filter C
IIR
from
Interface
BiQuad
A
BiQuad
B
BiQuad
C
BiQuad
D
Interp.
Filter C
´
to
modulator
Digital
Volume
Ctrl
Figure 5-25. Signal Chain for PRB_P19 and PRB_P22
5.12.2.9 2 Biquads, 3D, Filter A
IIR
Left
from
Left
Channel
Interface
+
BiQuad
BL
+
BiQuad
CL
Interp.
Filter A
´
to
Modulator
+
Digital
Volume
Ctrl
+
BiQuad
AL
+
-
BiQuad
AR
3D
PGA
+
from
Right
Channel
Interface
IIR
Right
-
+
BiQuad
BR
BiQuad
CR
Interp.
Filter A
´
to
Modulator
Digital
Volume
Ctrl
Figure 5-26. Signal Chain for PRB_P23
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5.12.2.10 5 Biquads, DRC, 3D, Filter A
IIR
from Left
Left
Channel
Interface
+
+
BiQuad
BL
BiQuad
CL
BiQuad
DL
BiQuad
EL
BiQuad
FL
Interp.
Filter A
to
Modulator
´
+
HPF
+
BiQuad
AL
+
-
BiQuad
AR
Digital
Volume
Ctrl
DRC
3D
PGA
from
Right
Channel
Interface
IIR
Right
+
+
BiQuad
BR
BiQuad
CR
BiQuad
DR
BiQuad
ER
BiQuad
FR
HPF
Interp.
Filter A
to
Modulator
´
Digital
Volume
Ctrl
DRC
Figure 5-27. Signal Chain for PRB_P24
5.12.2.11 5 Biquads, DRC, 3D, Beep Generator, Filter A
from
left
channel
interface
+ +
+
IIR
left
BiQuad
BL
BiQuad
CL
BiQuad
DL
BiQuad
EL
BiQuad
FL
HPF
+
-
BiQuad
AL
+
BiQuad
AR
Interp.
Filter
DRC
3D
PGA
IIR
right
*
Beep
Gen.
+ +
to
modulator
Digital
Volume
Ctrl
Beep
Volume
Ctrl
*
-
from
right
channel
interface
+
´
BiQuad
BR
BiQuad
CR
BiQuad
DR
BiQuad
ER
BiQuad
FR
HPF
Interp.
Filter
DRC
´
+
to
modulator
Digital
Volume
Ctrl
Figure 5-28. Signal Chain for PRB_P25
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5.12.3 User Programmable Filters
Depending on the selected processing block, different types and orders of digital filtering are available. Up
to 6 biquad sections are available for specific processing blocks.
The coefficients of the available filters are arranged as sequentially-indexed coefficients in two banks. If
adaptive filtering is chosen, the coefficient banks can be switched on-the-fly. For more details on adaptive
filtering please see Section 5.15.3.
The coefficients of these filters are each 24-bits wide, in two's-complement and occupy 3 consecutive 8-bit
registers in the register space. For default values please see Section 6.6.
5.12.3.1 1st-Order IIR Section
The IIR is of first-order and its transfer function is given by
Figure 5-29.
H( z) =
N0 + N1z
-1
2 23 - D1z -1
(5-8)
The frequency response for the 1st order IIR Section with default coefficients is flat
Table 5-14. DAC IIR Filter Coefficients
Filter
Filter Coefficient
1st Order IIR
ADC Coefficient Left Channel
ADC Coefficient Right
Channel
N0
C65 (Pg 46, Reg 28,29,30)
C68 (Pg 46, Reg 40,41,42)
N1
C66 (Pg 46. Reg 32,33,34)
C69 (Pg 46, Reg 44,45,46)
D1
C67 (Pg 46, Reg 36,37,38)
V70 (Pg 46, Reg 48,49,50)
5.12.3.2 Biquad Section
The transfer function of each of the Biquad Filters is given by
H( z ) =
N0 + 2 * N1z -1 + N2 z -2
2 23 - 2 * D1z -1 - D 2 z -2
(5-9)
Table 5-15. DAC Biquad Filter Coefficients
Filter
Coefficient
BIQUAD A
BIQUAD B
BIQUAD C
BIQUAD D
66
Left DAC Channel
Right DAC Channel
N0
C1 (Pg 44, Reg 12,13,14)
C33 (Pg 45, Reg 20,21,22)
N1
C2 (Pg 44, Reg 16,17,18)
C34 (Pg 45, Reg 24,25,26)
N2
C3 (Pg 44, Reg 20,21,22)
C35 (Pg 45, Reg 28,29,30)
D1
C4 (Pg 44, Reg 24,25,26)
C36 (Pg 45, Reg 32,33,34)
D2
C5 (Pg 44, Reg 28,29,30)
C37 (Pg 45, Reg 36,37,38)
N0
C6 (Pg 44, Reg 32,33,34)
C38 (Pg 45, Reg 40,41,42)
N1
C7 (Pg 44, Reg 36,37,38)
C39 (Pg 45, Reg 44,45,46)
N2
C8 (Pg 44, Reg 40,41,42)
C40 (Pg 45, Reg 48,49,50)
D1
C9 (Pg 44, Reg 44,45,46)
C41 (Pg 45, Reg 52,53,54)
D2
C10 (Pg 44, Reg 48,49,50)
C42 (Pg 45, Reg 56,57,58)
N0
C11 (Pg 44, Reg 52,53,54)
C43 (Pg 45, Reg 60,61,62)
N1
C12 (Pg 44, Reg 56,57,58)
C44 (Pg 45, Reg 64,65,66)
N2
C13 (Pg 44, Reg 60,61,62)
C45 (Pg 45, Reg 68,69,70)
D1
C14 (Pg 44, Reg 64,65,66)
C46 (Pg 45, Reg 72,73,74)
D2
C15 (Pg 44, Reg 68,69,70)
C47 (Pg 45, Reg 76,77,78)
N0
C16 (Pg 44, Reg 72,73,74)
C48 (Pg 45, Reg 80,81,82)
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Table 5-15. DAC Biquad Filter Coefficients (continued)
Filter
Coefficient
BIQUAD E
BIQUAD F
Left DAC Channel
Right DAC Channel
N1
C17 (Pg 44, Reg 76,77,78)
C49 (Pg 45, Reg 84,85,86)
N2
C18 (Pg 44, Reg 80,81,82)
C50 (Pg 45, Reg 88,89,90)
D1
C19 (Pg 44, Reg 84,85,86)
C51 (Pg 45, Reg 92,93,94)
D2
C20 (Pg 44, Reg 88,89,90)
C52 (Pg 45, Reg 96,97,98)
N0
C21 (Pg 44, Reg 92,93,94)
C53 (Pg 45, Reg 100,101,102)
N1
C22 (Pg 44, Reg 96,97,98)
C54 (Pg 45, Reg 104,105,106)
N2
C23 (Pg 44, Reg 100,101,102)
C55 (Pg 45, Reg 108,109,110)
D1
C24 (Pg 44, Reg 104,105,106)
C56 (Pg 45, Reg 112,113,114)
D2
C25 (Pg 44, Reg 108,109,110)
C57 (Pg 45, Reg 116,117,118)
N0
C26 (Pg 44, Reg 112,113,114)
C58 (Pg 45, Reg 120,121,122)
N1
C27 (Pg 44, Reg 116,117,118)
C59 (Pg 45, Reg 124,125,126)
N2
C28 (Pg 44, Reg 120,121,122)
C60 (Pg 46, Reg 8,9,10)
D1
C29 (Pg 44, Reg 124,125,126)
C61 (Pg 46, Reg 12,13,14)
D2
C30 (Pg 45, Reg 8,9,10)
C62 (Pg 46, Reg 16,17,18)
5.12.4 INTERPOLATION FILTER
5.12.4.1 Interpolation Filter A
Table 5-16. DAC Interpolation Filter A, Specification
Parameter
Condition
Value (Typical)
Units
Filter Gain Pass Band
0 … 0.45Fs
±0.015
dB
Filter Gain Stop Band
0.55Fs… 7.455Fs
–65
dB
21/Fs
s
Filter Group Delay
DAC Channel Response for Interpolation Filter A
(Red line corresponds to -65 dB)
0
-10
Magnitude - dB
-20
-30
-40
-50
-60
-70
-80
-90
1
2
5
6
3
4
Frequency Normalized w.r.t. FS
7
Figure 5-30. DAC Interpolation Filter A, Frequency Response
5.12.4.2 Interpolation Filter B
Filter B is specifically designed for an Fs of above 96ksps. Thus, the flat pass-band region easily covers
the required audio band of 0-20kHz.
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Table 5-17. DAC Interpolation Filter B, Specification
Parameter
Condition
Value (Typical)
Units
Filter Gain Pass Band
0 … 0.45Fs
±0.015
dB
Filter Gain Stop Band
0.55Fs… 3.45Fs
–58
dB
18/Fs
s
Filter Group Delay
DAC Channel Response for Interpolation Filter B
(Red line corresponds to -58 dB)
0
Magnitude - dB
-10
-20
-30
-40
-50
-60
-70
-80
0.5
1
1.5
2
2.5
3
Frequency Normalized w.r.t. FS
3.5
Figure 5-31. Channel Interpolation Filter B, Frequency Response
5.12.4.3 Interpolation Filter C
Filter C is specifically designed for the 192ksps mode. The pass band extends up to 0.40*Fs (corresponds
to 80kHz), more than sufficient for audio applications.
DAC Channel Response for Interpolation Filter C
(Red line corresponds to -43 dB)
0
Magnitude - dB
-10
-20
-30
-40
-50
-60
-70
0
0.2
0.4
0.6
0.8
1
1.2
Frequency Normalized w.r.t. FS
1.4
Figure 5-32. DAC Interpolation Filter C, Frequency Response
The basic filter characteristics for the Interpolation Filters A, B and C are as follows. These values are at
48ksps with the droop of the analog reconstruction filters taken into account.
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Table 5-18. DAC Interpolation Filter C, Specification
Parameter
Condition
Value (Typical)
Units
Filter Gain Pass Band
0 … 0.35Fs
±0.03
dB
Filter Gain Stop Band
0.60Fs… 1.4Fs
–43
dB
13/Fs
s
Filter Group Delay
5.13 DAC Output Drivers
5.13.1 Headphone Amplifier
The stereo headphone drivers on pins HPL and HPR can drive loads with impedances down to 16Ω in
single-ended AC-coupled headphone configurations, or loads down to 32Ω in differential mode, where a
speaker is connected between HPL and HPR. In single-ended drive configuration these drivers can drive
up to 15mW power into each headphone channel while operating at 1.8V analog supplies. While running
off AVdd supply the output common mode of headphone driver is set by the common mode setting of
analog inputs in Page 1, Reg 10, D(6), to allow maximum utilization of the analog supply range while
simultaneously providing a higher output-voltage swing. In cases when higher output-voltage swing is
required, the headphone amplifiers can run directly off the higher supply voltage on LDOIN input (up to
3.6V). To use the higher supply voltage for higher output signal swing, the output common mode can be
adjusted to either 1.25V, 1.5V or 1.65V by configuring Page 1, Reg 10, D(5:4). When the common-mode
voltage is configured at 1.65V and LDOIN supply is 3.3V, the headphones can each deliver up to 40mW
power into a 16Ω load.
The headphone drivers are capable of driving a mixed combination of DAC signal, left and right ADC PGA
signal and line-bypass from analog input IN1L and IN1R by configuring Page 1, Reg and Page 1, Reg 13
respectively. The ADC PGA signals can be attenuated up to 30dB before routing to headphone drivers by
configuring Page 1, Reg 24 and Page 1, Reg 25. The line-input signals can be attenuated up to 72dB
before routing by configuring Page 1, Reg 22 and 23. The level of the DAC signal can be controlled using
the digital volume control of the DAC in Page 0, Reg 65 and 66. To control the output-voltage swing of
headphone drivers, the digital volume control provides a range of –6.0dB to +29.0dB (1) in steps of 1dB.
These can be configured by programming Page 1, Reg 16 and 17. These level controls are not meant to
be used as dynamic volume control, but more to set output levels during initial device configuration. Refer
to Section 5.14.1 for recommendations for using headphone volume control for achieving 0dB gain
through the DAC channel with various configurations.
HPL
HPR
Figure 5-33. Stereo Headphone Configuration
(1)
If the device must be placed into 'mute' from the –6.0dB setting, set the device at a gain of –5.0dB first, then place the device into mute.
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Differential
Loading
The headphone amplifiers can be configured differentially as shown in Figure 5-34. However this scheme
is supported only when using the headphone-output stage powered from the AVdd supply.
HPL
HPR
Figure 5-34. Differential Receiver Speaker Configuration
The TLV320AIC3254 supports an additional low-power mode for routing a mono DAC for a differential
headphone configuration as shown in Figure 5-35.
HPL
LEFT_DACP
LEFT
DAC AFIR
LEFT_DACM
HPR
Figure 5-35. Low Power Mono DAC to Differential Headphone
The TLV320AIC3254 headphone drivers support pop-free operation. Because the HPL and HPR are
high-power drivers, pop can result due to sudden transient changes in the output drivers if care is not
taken. The most critical care is required while using the drivers as stereo single-ended
capacitively-coupled drivers as shown in Figure 5-33. The output drivers achieve pop-free power-up by
using slow power-up modes. Conceptually, the circuit during power-up can be visualized as
Cc
Output
Driver
Rpop
PAD
Rload
Figure 5-36. Conceptual Circuit for Pop-Free Power-up
The value of Rpop can be chosen by setting register Page 1, Register 20, D(1:0).
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Table 5-19. Rpop Values
Page 1, Register 20, D(1:0)
Rpop Value
00
2 kΩ
01
6 kΩ
10
25 kΩ
To minimize audible artifacts, two parameters can be adjusted to match application requirements. The
voltage Vload across Rload at the beginning of slow charging should not be more than a few mV. At that
time the voltage across Rload can be determined as:
V load =
R load
R load + R pop
´ V cm
(5-10)
For a typical Rload of 32 Ω, Rpop of 6 kΩ or 25 kΩ will deliver good results (see Table 5-19 for register
settings).
According to the conceptual circuit in Figure 5-36, the voltage on PAD will exponentially settle to the
output common-mode voltage based on the value of Rpop and Cc. Thus, the output drivers must be in slow
power-up mode for time T, such that at the end of the slow power-on period, the voltage on Vpad is very
close to the common-mode voltage. The TLV320AIC3254 allows the time T to be adjusted to allow for a
wide range of Rload and Cc by programming Page 1, Register 20, D(5:2). For the time adjustments, the
value of Cc is assumed to be 47µF. N=5 is expected to yield good results.
Page 1, Register 20D(5:2)
Slow Charging Time=N*Time
Constants(for Rpop and 47µF)
0000
N=0
0001
N=0.5
0010
N=0.625
0011
N=0.75
0100
N=0.875
0101
N=1.0
0110
N=2.0
0111
N=3.0
1000
N=4.0
1001
N=5.0
1010
N=6.0
1011
N=7.0
1100
N=8.0
1101
N=16 ( Not valid for Rpop=25K)
1110
N=24 ( Not valid for Rpop=25K)
1111
N=32 ( Not valid for Rpop=25K)
Again for e.g., for Rload=32Ω, Cc=47µF and common mode of 0.9V the number of time constants required
for pop-free operation is 5 or 6. Higher or lower value of Cc will require higher or lower value for N.
During the slow-charging period, no signal is routed to the output driver. Therefore, choosing a larger than
necessary value of N results in a delay from power-up to signal at output. At the same time, choosing N to
be smaller than the optimal value results in poor pop performance at power-up.
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The signals being routed to headphone drivers ( e.g. DAC, MAL , MAR and IN1) often have DC offsets
due to less-than-ideal processing. As a result, when these signals are routed to output drivers, the offset
voltage causes a pop. To improve the pop-performance in such situations, a feature is provided to
soft-step the DC-offset. At the beginning of the signal routing, a high-value attenuation can be applied
which can be progressively reduced in steps until the desired gain in the channel is reached. The time
interval between each of these gain changes can be controlled by programming Page 1, Register 20,
D(7:6). This gain soft-stepping is applied only during the initial routing of the signal to the output driver and
not during subsequent gain changes.
Page 1,
Register 20,
D(7:6)
Soft-stepping Step Time
During initial signal routing
00
0 ms ( soft-stepping disabled)
01
50ms
10
100ms
11
200ms
It is recommended to use the following sequence for achieving optimal pop performance at power-up
1. Choose the value of Rpop, N ( time constants) and soft-stepping step time for slow power-up.
2. Choose the configuration for output drivers, including common modes and output stage power
connections
3. Select the signals to be routed to headphones.
4. Power-up the blocks driving signals into HPL and HPR, but keep it muted
5. Unmute HPL and HPR and set the desired gain setting.
6. Power-on the HPL and HPR drivers.
7. Unmute the block driving signals to HPL and HPR after the Driver PGA flags are set to indicate
completion of soft-stepping after power-up. These flags can be read from Page 1, Register 63, D(7:6).
It is important to configure the Headphone Output driver depop control registers before powering up the
headphone; these register contents should not be changed when the headphone drivers are powered up.
Before powering down the HPL and HPR drivers, it is recommended that user read back the flags in Page
1, Register 63. For example. before powering down the HPL driver, ensure that bit D(7) = 1 and bit D(3) =
1 if IN1_L is routed to HPL and bit D(1) = 1 if the Left Mixer is routed to HPL. The output driver should be
powered down only after a steady-state power-up condition has been achieved. This steady state
power-up condition also must be satisfied for changing the HPL/R driver mute control in Page 1, Register
16 and 17, D(7), i.e. muting and unmuting should be done after the gain and volume controls associated
with routing to HPL/R finished soft-stepping.
In the differential configuration of HPL and HPR, when no coupling capacitor is used, the slow charging
method for pop-free performance need not be used. In the differential load configuration for HPL and
HPR, it is recommended to not use the output driver MUTE feature, because a pop may result.
During the power-down state, the headphone outputs are weakly pulled to ground using an approximately
50kΩ resistor to ground, to maintain the output voltage on HPL and HPR pins.
5.13.2 Headphone Amplifier Class-D Mode
By default the headphone amplifiers in the TLV320AIC3254 work in Class-AB mode. By writing to Page 1,
Register 3, D(7:6) for the left headphone amplifier, and Page 1, Register 4, D(7:6) with value 11, the
headphone amplifiers enter a Class-D mode of operation.
In this mode a high frequency digital pulse-train representation of the DAC signal is fed to the load
connected to HPL and HPR outputs.
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Because the output signal is a pulse train switching between Power Supply and Ground, the efficiency of
the amplifier is greatly improved. In this mode however, for good noise performance, care should be taken
to keep the analog power supply clean.
For using the Class-D mode of operation, the following clock-divider condition should be met:
MDAC = I × 4, where I = 1, 2, ..., 32
When a direct digital pulse train is driven out as a signal, high frequencies as a function of pulse train
frequency are also present which lead to power waste. To increase the efficiency and reduce power
dissipation in the load due to these high frequencies, an LC filter should be used in series with the output
and the load. The cutoff frequency of the LC filter should be adjusted to allow audio signals below 20kHz
to pass through, but highly attenuate the high-frequency signal content.
L = 82 mH
C = 1 mF
CC = 47 mF
Rload = 32 W
Figure 5-37. Configuration for Using Headphone Amplifier in Class-D Mode
For using the headphones in the Class-D mode of operation, the headphones should first be powered up
in default Class-AB mode to charge the AC-coupling capacitor to the set common mode voltage. Once the
headphone amplifiers have been so powered up, the DAC should be routed to headphones and unmuted
before they can be switched to the Class-D mode. After Class D mode has been turned on, the linear,
Class AB mode amplifier must be turned off. For powering down the headphone amplifiers, the DAC
should first be muted.
5.13.3 Line Out Amplifier
The stereo line level drivers on LOL and LOR pins can drive a wide range of line level resistive
impedances in the range of 600Ω to 10kΩ. The output common modes of line level drivers can be
configured to equal either the analog input common-mode setting, or 1.65V by programming Page 1,
Register 3, D(3). With output common-mode setting of 1.65V and LDOIN supply at 3.3V the line-level
drivers can drive up to 1Vrms output signal. The line-level drivers can drive out a mixed combination of
DAC signal and attenuated ADC PGA signal. The signal mixing can be configured by programming Page
1, Register 14 and 15. Additionally, the two line-level drivers can be configured to act as a mono
differential line level driver by routing output of LOR to LOL ( Page 1, Register 14, D(0) = ‘1’).
The output of DAC can be simultaneously played back to the stereo headphone drivers as well as stereo
line- level drivers. In such a case, the DAC signal at the headphone outputs and line outputs are
out-of-phase with respect to each other.
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LOL
LOR
Figure 5-38. Stereo Single-Ended Line-out
LOL
Output +
RIGHT_DACP
LEFT
DAC AFIR
LOR
Output -
RIGHT_DACM
Figure 5-39. Low Power Mono DAC to Differential Line-out
5.14 DAC GAIN SETTING
5.14.1 PowerTune Modes
As part of the PowerTune strategy, the analog properties of the DAC are adjusted. As a consequence, the
full-scale signal swing achieved at the headphone and line outputs must be adjusted.
Please see Table 5-20 for the proper gain compensation values across the different combinations.
Table 5-20. DAC Gain vs. PowerTune Modes
DAC PowerTune
Mode Control
PowerTune Mode
Page 1,Register 3/4,
D(4:2)
Headphone/Line-out Gain
CM = 0.75V, Gain for 375mVRMS output
swing at 0dB full scale input
CM = 0.9V, Gain for 500mVRMS output
swing at 0dB full scale input
0
000
PTM_P3, PTM_P4
–2
001
PTM_P2
2
4
010
PTM_P1
12
14
5.14.2 Digital Volume Control
The TLV320AIC3254 signal processing blocks incorporate a digital volume control block that can control
the volume of the playback signal from +24dB to –63.5dB in steps of 0.5dB. These can be controlled by
writing to Page 0, Register 65 and 66. The volume control of left and right channels by default can be
controlled independently, however by programming Page 0, Reg 64, D(1:0), they can be made
interdependent. The volume changes are soft-stepped in steps of 0.5dB to avoid audible artifacts during
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gain change. The rate of soft-stepping can be controlled by programming Page 0, Reg 63, D(1:0) to either
one step per frame ( DAC_FS ) or one step per 2 frames. The soft-stepping feature can also be entirely
disabled. During soft-stepping the value of the actual applied gain would differ from the programmed gain
in register. The TLV320AIC3254 gives a feedback to the user in form of register readable flag to indicate
that soft-stepping is currently in progress. The flags for left and right channels can be read back by
reading Page 0, Reg 38, D(4) and D(0) respectively. A value of 0 in these flags indicates a soft-stepping
operation in progress, and a value of 1 indicates that soft-stepping has completed. A soft-stepping
operation comes into effect during a) power-up, when the volume control soft-steps from –63.5dB to
programmed gain value b) volume change by user when DAC is powered up and c) power-down, when
the volume control block soft-steps to –63.5dB before powering down the channel.
5.14.3 Dynamic Range Compression
Typical music signals are characterized by crest factors, the ratio of peak signal power to average signal
power, of 12dB or more. In order to avoid audible distortions due to clipping of peak signals, the gain of
the DAC channel must be adjusted so as not to cause hard clipping of peak signals. As a result, during
nominal periods, the applied gain is low, causing the perception that the signal is not loud enough. To
overcome this problem, the DRC in the TLV320AIC3254 continuously monitors the output of the DAC
Digital Volume control to detect its power level w.r.t. 0dB FS. When the power level is low, it increases the
input signal gain to make it sound louder. At the same time, if a peaking signal is detected, it
autonomously reduces the applied gain to avoid hard clipping. This results in sounds more pleasing to the
ear as well as sounding louder during nominal periods.
The DRC functionality in the TLV320AIC3254 is implemented by a combination of Processing Blocks in
the DAC channel as described in Section 5.12.2.
The DRC can be disabled by writing into Page 0, Reg 68, D(6:5).
The DRC typically works on the filtered version of the input signal. The input signals have no audio
information at DC and extremely low frequencies; however they can significantly influence the energy
estimation function in DRC. Also most of the information about signal energy is concentrated in the low
frequency region of the input signal.
In order to estimate the energy of the input signal, the signal is first fed to the DRC high-pass filter and
then to the DRC low-pass filter. These filters are implemented as first-order IIR filters given by
N0 + N1z -1
HHPF ( z ) = 23
2 - D1z -1
(5-11)
HLPF ( z ) =
N0 + N1z -1
2 23 - D1z -1
(5-12)
The coefficients for these filters are 24-bits wide in two’s-complement and are user programmable through
register write as given in Table 5-21
Table 5-21. DRC HPF and LPF Coefficients
Coefficient
Location
HPF N0
C71 Page 46, Register 52 to 55
HPF N1
C72 Page 46, Register 56 to 59
HPF D1
C73 Page 46, Register 60 to 63
LPF N0
C74 Page 46, Register 64 to 67
LPF N1
C75 Page 46, Register 68 to 71
LPF D1
C76 Page 46, Register 72 to 75
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The default values of these coefficients implement a high-pass filter with a cut-off at 0.00166*DAC_FS,
and a low-pass filter with a cutoff at 0.00033 * DAC_FS.
The output of the DRC high-pass filter is fed to the Processing Block selected for the DAC Channel. The
absolute value of the DRC-LPF filter is used for energy estimation within the DRC.
The gain in the DAC Digital Volume Control is controlled by Page 0, Register 65 and 66. When the DRC is
enabled, the applied gain is a function of the Digital Volume Control register setting and the output of the
DRC.
The DRC parameters are described in sections that follow.
5.14.3.1 DRC Threshold
The DRC Threshold represents the level of the DAC playback signal at which the gain compression
becomes active. The output of the digital volume control in the DAC is compared with the set threshold.
The threshold value is programmable by writing to register Page 0, Register 68, D(4:2). The Threshold
value can be adjusted between –3dBFS to -24dBFS in steps of 3dB. Keeping the DRC Threshold value
too high may not leave enough time for the DRC block to detect peaking signals, and can cause
excessive distortion at the outputs. Keeping the DRC Threshold value too low can limit the perceived
loudness of the output signal.
The recommended DRC-Threshold value is –24 dB.
When the output signal exceeds the set DRC Threshold, the interrupt flag bits at Page 0, Register 44,
D(3:2) are updated. These flag bits are 'sticky' in nature, and are reset only after they are read back by the
user. The non-sticky versions of the interrupt flags are also available at Page 0, Register 46, D(3:2).
5.14.3.2 DRC Hysteresis
DRC Hysteresis is programmable by writing to Page 0, Register 68, D(1:0). It can be programmed to
values between 0dB and 3dB in steps of 1dB. It is a programmable window around the programmed DRC
Threshold that must be exceeded for a disabled DRC to become enabled, or an enabled DRC to become
disabled. For example, if the DRC Threshold is set to -12dBFS and DRC Hysteresis is set to 3dB, then if
the gain compressions in the DRC is inactive, the output of the DAC Digital Volume Control must exceed
–9dBFS before gain compression due to the DRC is activated. Similarly, when the gain compression in
the DRC is active, the output of the DAC Digital Volume Control needs to fall below -15dBFS for gain
compression in the DRC to be deactivated. The DRC Hysteresis feature prevents the rapid activation and
de-activation of gain compression in the DRC in cases when the output of DAC Digital Volume Control
rapidly fluctuates in a narrow region around the programmed DRC Threshold. By programming the DRC
Hysteresis as 0dB, the hysteresis action is disabled.
Recommended Value of DRC Hysteresis is 3 dB.
5.14.3.3 DRC Hold
The DRC Hold is intended to slow the start of decay for a specified period of time in response to a
decrease in energy level. To minimize audible artifacts, it is recommended to set the DRC Hold time to 0
through programming Page 0, Register 69, D(6:3) = 0000.
5.14.3.4 DRC Attack Rate
When the output of the DAC Digital Volume Control exceeds the programmed DRC Threshold, the gain
applied in the DAC Digital Volume Control is progressively reduced to avoid the signal from saturating the
channel. This process of reducing the applied gain is called Attack. To avoid audible artifacts, the gain is
reduced slowly with a rate equaling the Attack Rate programmable via Page 0, Register 70, D(7:4). Attack
Rates can be programmed from 4dB gain change per 1/DAC_FS to 1.2207e-5dB gain change per
1/DAC_FS.
Attack Rates should be programmed such that before the output of the DAC Digital Volume control can
clip, the input signal should be sufficiently attenuated. High Attack Rates can cause audible artifacts, and
too-slow Attack Rates may not be able to prevent the input signal from clipping.
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The recommended DRC Attack Rate value is 1.9531e-4 dB per 1/DAC_FS.
5.14.3.5 DRC Decay Rate
When the DRC detects a reduction in output signal swing beyond the programmed DRC Threshold, the
DRC enters a Decay state, where the applied gain in Digital Volume Control is gradually increased to
programmed values. To avoid audible artifacts, the gain is slowly increased with a rate equal to the Decay
Rate programmed through Page 0, Register 70, D(3:0). The Decay Rates can be programmed from
1.5625e-3dB per 1/DAC_FS to 4.7683e-7dB per 1/DAC_FS. If the Decay Rates are programmed too high,
then sudden gain changes can cause audible artifacts. However, if it is programmed too slow, then the
output may be perceived as too low for a long time after the peak signal has passed.
The recommended Value of DRC Attack Rate is 2.4414e-5 dB per 1/DAC_FS.
5.14.3.6 Example Setup for DRC
•
•
•
•
•
•
PGA Gain = 12 dB
Threshold = -24 dB
Hysteresis = 3 dB
Hold time = 0 ms
Attack Rate = 1.9531e-4 dB per 1/DAC_FS
Decay Rate = 2.4414e-5 dB per 1/DAC_FS
Script
#Go to Page 0
w 30 00 00
#DAC => 12 db gain left
w 30 41 18
#DAC => 12 db gain right
w 30 42 18
#DAC => DRC Enabled for both channels, Threshold = -24 db, Hysteresis = 3 dB
w 30 44 7F
#DRC Hold = 0 ms, Rate of Changes of Gain = 0.5 dB/Fs'
w 30 45 00
#Attack Rate = 1.9531e-4 dB/Frame , DRC Decay Rate =2.4414e-5 dB/Frame
w 30 46 B6
#Go to Page 46
w 30 00 2E
#DRC HPF
w 30 34 7F AB 00 00 80 55 00 00 7F 56 00 00
#DRC LPF
W 30 40 00 11 00 00 00 11 00 00 7F DE 00 00
5.15 DAC Special Functions
5.15.1 Beep Generation
A special function has also been included in the processing block PRB_P25 for generating a digital
sine-wave signal that is sent to the DAC. This is intended for generating key-click sounds for user
feedback. A default value for the sine-wave frequency, sine burst length, and signal magnitude is kept in
the Tone Generator Registers Page 0/Registers 71 through 79. The sine wave generator is very flexible,
and is completely register programmable via 9 registers of 8 bits each to provide many different sounds.
Two registers are used for programming the 16-bit, two's-complement, sine-wave coefficient (Page 0,
Registers 76 and 77). Two other registers program the 16-bit, two's-complement, cosine-wave coefficient
(Page 0, Registers 78 and 79). This coefficient resolution allows virtually any frequency of sine wave in the
audio band to be generated up to DAC_FS/2.
Three registers are used to control the length of the sine burst waveform which are located on Page 0,
Registers 73, 74, and 75. The resolution (bit) in the registers of the sine burst length is one sample time,
so this allows great control on the overall time of the sine burst waveform. This 24-bit length timer
supports 16,777,215 sample times. (For example if DAC_FS is set at 48kHz, and the registers combined
value equals 96000d (01770h), then the sine burst would last exactly two seconds.)
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Two registers are used to independently control the Left sine-wave volume and the Right sine-wave
volume. The 6-bit digital volume control allows level control of 0dB to –63dB in one dB steps. The
left-channel volume is controlled by writing to Page 0, Register 71, D(5:0). The right-channel volume is
controlled by Page 0, Register 72, D(5:0). A master volume control for the left and right channel of the
beep generator can be set up using Page 0, Register 72, D(7:6). The default volume control setting is
0dB, the tone generator maximum-output level.
For playing back the sine wave, the DAC must be configured with regards to clock setup and routing. The
sine wave gets started by setting the Beep Generator Enable Bit (Page 1, Reg 71, D(7)=1)). After the sine
wave has played for its predefined time period this bit will automatically set back to 0. While the sine wave
is playing, the parameters of the beep generator cannot be changed. To stop the sine wave while it is
playing set the Beep Generator Enable Bit to 0.
5.15.2 DIGITAL AUTO MUTE
The TLV320AIC3254 also incorporates a special feature, in which the DAC channel is auto-muted when a
continuous stream of DC-input is detected. By default, this feature is disabled. It can be enabled by writing
a non-000 value into Page 0, Register 64, D(6:4). The non-zero value controls the duration of continuous
stream of DC-input before which the auto-mute feature takes effect. This feature is especially helpful for
eliminating high-frequency-noise power being delivered into the load even during silent periods of speech
or music.
5.15.3 Adaptive Filtering
When the DAC is running, the user-programmable filter coefficients are locked and cannot be accessed
for either read or write.
However the TLV320AIC3254 offers an adaptive filter mode as well. Setting Register Page 44,Reg 1,
D(2)=1 will turn on double buffering of the coefficients. In this mode, filter coefficients can be updated
through the host, and activated without stopping and restarting the DAC. This enables advanced adaptive
filtering applications.
In the double-buffering scheme, all coefficients are stored in two buffers (Buffers A and B). When the DAC
is running and adaptive filtering mode is turned on, setting the control bit Page 44, Reg 1, D(0)=1 switches
the coefficient buffers at the next start of a sampling period. This bit is set back to 0 after the switch
occurs. At the same time, the flag Page 44, Reg 1, D(1) toggles.
The flag in Page 44, Reg 1, D(1) indicates which of the two buffers is actually in use.
Page 44, Reg 1, D(1)=0: Buffer A is in use by the DAC engine, D(1)=1: Buffer B is in use.
While the device is running, coefficient updates are always made to the buffer not in use by the DAC,
regardless to which buffer the coefficients have been written.
DAC running
Page 44, Reg 1, D(1)
Coefficient Buffer in use
Writing to
Will update
No
0
None
C1, Buffer A
C1, Buffer A
No
0
None
C1, Buffer B
C1, Buffer B
Yes
0
Buffer A
C1, Buffer A
C1, Buffer B
Yes
0
Buffer A
C1, Buffer B
C1, Buffer B
Yes
1
Buffer B
C1, Buffer A
C1, Buffer A
Yes
1
Buffer B
C1, Buffer B
C1, Buffer A
The user programmable coefficients C1 to C70 are defined on Pages 44, 45 and 46 for Buffer A and
Pages 62, 63 and 64 for Buffer B.
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5.16 DAC Setup
The following paragraphs are intended to guide a user through the steps necessary to configure the
TLV320AIC3254 DAC.
Step 1
The system clock source (master clock) and the targeted DAC sampling frequency must be identified.
Depending on the targeted performance the decimation filter type (A, B or C) and DOSR value can be
determined.
Filter A should be used for 48kHz high-performance operation, DOSR must be a multiple of 8.
Filter B should be used for up to 96kHz operations, DOSR must be a multiple of 4.
Filter C should be used for up to 192kHz operations, DOSR must be a multiple of 2.
In all cases the DOSR is limited in its range by the following condition:
2.8MHz < DOSR * DAC_FS < 6.2MHz
Based on the identified filter type and the required signal processing capabilities, the appropriate
processing block can be determined from the list of available processing blocks (PRB_P1 to PRB_P25).
Based on the available master clock, the chosen DOSR and the targeted sampling rate, the clock divider
values NDAC and MDC can be determined. If necessary, the internal PLL can add a large degree of
flexibility.
In summary, Codec_Clkin (derived directly from the system clock source or from the internal PLL) divided
by MDAC, NDAC and DOSR must be equal to the DAC sampling rate DAC_FS. The Clodec_Clkin clock
signal is shared with the ADC clock generation block.
CODEC_CLKIN = NADC*MADC*DOSR*DAC_FS
To a large degree, NDAC and MDAC can be chosen independently in the range of 1 to 128. In general,
NDAC should be as large as possible as long as the following condition can still be met:
MADC*DOSR/32 ≥ RC
RC is a function of the chosen processing block and is listed in Table 5-13.
The common-mode voltage setting of the device is determined by the available analog power supply and
the desired PowerTune mode. This common-mode (input common-mode) value is common across the
ADC, DAC and analog bypass path. The output common-mode setting is determined by the available
analog power supplies (AVdd and LDOin) and the desired output-signal swing.
At this point the following device specific parameters are known:
PRB_Rx, DOSR, NADC, MADC, input and output common-mode values
If the PLL is used, the PLL parameters P, J, D and R are determined as well.
Step 2
Setting up the device via register programming:
The following list gives a sequence of items that must be executed in the time between powering the
device up and reading data from the device:
Define starting point:
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Set register page to 0
Initiate SW Reset
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Program PLL clock dividers P,J,D,R (if PLL is necessary)
Power up PLL (if PLL is necessary)
Program and power up NADC
Program and power up MADC
Program OSR value
Program I2S word length if required (e.g. 20bit)
Program the processing block to be used
At this point, at the latest, analog power supply must be applied to the device ( via internal LDO or
external)
Program Analog Blocks
Set register Page to 1
Disable coarse AVdd generation
Enable Master Analog Power Control
Program Common Mode voltage
Program PowerTune (PTM) mode
Program Reference fast charging
Program Headphone specific depop settings (in case of headphone driver
used)
Program routing of DAC output to the output amplifier (headphone or line out)
Unmute and set gain of output driver
Power up output driver
Apply waiting time determined by the de-pop settings and the soft-stepping settings of the driver gain or
poll Page 1, Reg 63
Power Up DAC
Set register Page to 0
Power up DAC Channels
Unmute digital volume control
A detailed example can be found in Section 5.23.
5.17 CLOCK GENERATION AND PLL
The TLV320AIC3254 supports a wide range of options for generating clocks for the ADC and DAC
sections as well as interface and other control blocks as shown in Figure 5-40. The clocks for ADC and
DA require a source reference clock. This clock can be provided on variety of device pins such as MCLK,
BCLK or GPI pins. The source reference clock for the codec can be chosen by programming the
CODEC_CLKIN value on Page 0, Register 4, D(1:0). The CODEC_CLKIN can then be routed through
highly-flexible clock dividers shown in Figure 5-40 to generate the various clocks required for ADC, DAC
and the miniDSP sections. In the event that the desired audio or miniDSP clocks cannot be generated
from the reference clocks on MCLK, BCLK or GPIO, the TLV320AIC3254 also provides the option of using
the on-chip PLL which supports a wide range of fractional multiplication values to generate the required
clocks. Starting from CODEC_CLKIN the TLV320AIC3254 provides several programmable clock dividers
to help achieve a variety of sampling rates for ADC, DAC and clocks for the miniDSP.
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BCLK
MCLK
DIN/MFP1
GPIO
PLL _CLKIN
PLL
×(R×J·D)/P
BCLK
MCLK
GPIO
PLL_CLK
CODEC_CLKIN
¸ NDAC
¸ NADC
NDAC=1,2,…..,127,128
To DAC_miniDSP
clock generation
DAC_CLK
¸ MDAC
MDAC=1,2,…..,127,128
NADC=1,2,…..,127,128
To ADC _miniDSP
clock generation
ADC_CLK
¸ MADC
MADC=1,2,…..,127,128
ADC_MOD_CLK
DAC_MOD_CLK
¸ DOSR
DOSR=1,2,…..,1023,1024
DAC_FS
¸ AOSR
AOSR=1,2,…..,255,256
ADC_FS
Figure 5-40. Clock Distribution Tree
CODEC _ CLKIN
NADC ´ MADC ´ AOSR
CODEC _ CLKIN
ADC _ MOD _ CLK =
NADC ´ MADC
CODEC _ CLKIN
DAC _ FS =
NDAC ´ MDAC ´ DOSR
CODEC _ CLKIN
DAC _ MOD _ CLK =
NDAC ´ MDAC
ADC _ FS =
(5-13)
(5-14)
(5-15)
(5-16)
Table 5-22. CODEC CLKIN Clock Dividers
Divider
Bits
NDAC
Page 0, Register 11, D(6:0)
MDAC
Page 0, Register 12, D(6:0)
DOSR
Page 0, Register 13, D(1:0) + Page 0, Register 14, D(7:0)
NADC
Page 0, Register 18, D(6:0)
MADC
Page 0, Register 19, D(6:0)
AOSR
Page 0, Register 20, D(7:0)
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The DAC Modulator is clocked by DAC_MOD_CLK. For proper power-up operating of the DAC Channel,
these clocks must be enabled by configuring the NDAC and MDAC clock dividers ( Page 0,Register 11,
D(7) =1 and Page 0, Register 12, D(7)=1). When the DAC channel is powered down, the device internally
initiates a power-down sequence for proper shut-down. During this shut-down sequence, the NDAC and
MDAC dividers must not be powered down, or else a proper low power shut-down may not take place.
The user can read back the power-status flag Page 0, Register 37, D(7) and Page 0, Register 37, D(3).
When both the flags indicate power-down, the MDAC divider may be powered down, followed by the
NDAC divider.
The ADC modulator is clocked by ADC_MOD_CLK. For proper power-up of the ADC Channel, these
clocks are enabled by the NADC and MADC clock dividers (Page 0,Register 18, D(7) =1 and Page 0,
Register 19, D(7)=1). When the ADC channel is powered down, the device internally initiates a
power-down sequence for proper shut-down. During this shut-down sequence, the NADC and MADC
dividers must not be powered down, or else a proper low power shut-down may not take place. The user
can read back the power-status flag Page 0, Register 36, D(6) and Page 0, Register 36, D(2). When both
the flags indicate power-down, the MADC divider may be powered down, followed by NADC divider.
When ADC_CLK is derived from the NDAC divider output, the NDAC must be kept powered up till the
power-down status flags for ADC do not indicate power-down. When the input to the AOSR clock divider
is derived from DAC_MOD_CLK, then MDAC must be powered up when ADC_FS is needed ( i.e. when
WCLK is generated by TLV320AIC3254 or AGC is enabled) and can be powered down only after the ADC
power-down flags indicate power-down status.
In general, all the root clock dividers should be powered down only after the child clock dividers have been
powered down for proper operation.
The TLV320AIC3254 also has options for routing some of the internal clocks to the output pins of the
device to be used as general purpose clocks in the system. The feature is shown in Figure 5-41.
DAC_MOD_CLK
DAC_CLK
ADC_MOD_CLK
ADC_CLK
BDIV_CLKIN
÷N
N = 1,2,...,127,128
BCLK
Figure 5-41. BCLK Output Options
In the mode when TLV320AIC3254 is configured to drive the BCLK pin (Page 0, Register 27, D3=’1’) it
can be driven as divided value of BDIV_CLKIN. The division value can be programmed in Page 0,
Register 30, D(6:0) from 1 to 128. The BDIV_CLKIN can itself be configured to be one of DAC_CLK,
DAC_MOD_CLK, ADC_CLK or ADC_MOD_CLK by configuring the BDIV_CLKIN mux in Page 0, Register
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29, D(1:0). Additionally a general purpose clock can be driven out on either GPIO, DOUT or MISO pin.
This clock can be a divided down version of CDIV_CLKIN. The value of this clock divider can be
programmed from 1 to 128 by writing to Page 0, Register 26, D(6:0). The CDIV_CLKIN can itself be
programmed as one of the clocks among the list shown in Figure 5-42. This can be controlled by
programming the mux in Page 0, Register 25, D(2:0).
PLL_CLK
MCLK
BCLK
DIN
DAC_MOD_CLK
DAC_CLK
ADC_MOD_CLK
ADC_CLK
CDIV_CLKIN
÷M
M = 1,2,...,127,128
CLKOUT
GPIO
MISO
DOUT
Figure 5-42. General Purpose Clock Output Options
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Table 5-23. Maximum TLV320AIC3254 Clock Frequencies
DVdd ≥ 1.26V
DVdd ≥ 1.65V
CODEC_CLKIN
50MHz
137MHz when NDAC is even, NADC is even
112MHz when NDAC is even, NADC is odd
110MHz when NDAC is odd, NADC is even
110MHz when NDAC is odd, NADC is odd
ADC_CLK
25MHz
55.296MHz
ADC_miniDSP_CLK
20MHz
55.296MHz
51.0MHz if AGC is on
ADC_MOD_CLK
6.758MHz
6.758MHz
ADC_FS
0.192MHz
0.192MHz
DAC_CLK
25MHz
55.296MHz
DAC_miniDSP_CLK
20MHz
55.296MHz
DAC_MOD_CLK
6.758MHz
4.2MHz when Class-D Mode Headphone is
used
6.758MHz
DAC_FS
0.192MHz
0.192MHz
BDIV_CLKIN
25MHz
55.296MHz
CDIV_CLKIN
50MHz
112MHz when M is odd
137MHz when M is even
5.17.1 PLL
The TLV320AIC3254 has an on chip PLL with fractional multiplication to generate the clock frequency
needed by the audio ADC, DAC, and Digital Signal Processing blocks. The programmability of the PLL
allows operation from a wide variety of clocks that may be available in the system.
The PLL input supports clocks varying from 512kHz to 20MHz and is register programmable to enable
generation of required sampling rates with fine precision. The PLL can be turned on by writing to Page 0,
Register 5, D(7). When the PLL is enabled, the PLL output clock PLL_CLK is given by the following
equation:
PLL _ CLKIN ´ R ´ J.D
PLL _ CLK =
P
(5-17)
R = 1, 2, 3,4
J = 4,5,6,… 63, and D = 0, 1, 2… 9999
P = 1, 2, 3… 8
R, J, D, and P are register programmable.
The PLL can be programmed via Page 0, Registers 5 thru 8. The PLL can be turned on via Page 0,
Register 5, D(7). The variable P can be programmed via Page 0, Register 5, D(6:4). The default register
value for P is 2. The variable R can be programmed via Page 0, Register 5, D(3:0). The default register
value for R is 1. The variable J can be programmed via Page 0, Register 6, D(5:0). The variable D is
12-bits and is programmed into two registers. The MSB portion can be programmed via Page 0, Register
7, D(5:0), and the LSB portion is programmed via Page 0, Register 8, D(5:0). The default register value for
D is 0.
When the PLL is enabled the following conditions must be satisfied
• When the PLL is enabled and D = 0, the following conditions must be satisfied for PLL_CLKIN:
PLL _ CLKIN
512kHz £
£ 20MHz
P
•
84
(5-18)
When the PLL is enabled and D ≠ 0, the following conditions must be satisfied for PLL_CLKIN:
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10MHz £
PLL _ CLKIN
£ 20MHz
P
(5-19)
In TLV320AIC3254 the PLL_CLK supports a wide range of output clock, based on register settings and
power-supply conditions.
Table 5-24. PLL_CLK Frequency Range
AVdd
PLL Mode
Page 0, Reg 4, D6
Min PLL_CLK
frequency (MHz)
Max PLL_CLK
frequency (MHz)
≥1.5V
0
80
103
1
95
110
0
80
118
1
92
123
0
80
132
1
92
137
≥1.65V
≥1.80V
The PLL can be powered up independent of the ADC and DAC blocks, and can also be used as a general
purpose PLL by routing its output to the GPIO output. After powering up the PLL, PLL_CLK is available
typically after 10ms. The PLL output frequency is controlled by J.D and R dividers
PLL Divider
Bits
J
Page 0, Register 6, D(5:0)
D
Page 0, Register 7, D(5:0) && Page 0, Register 8, D(7:0)
R
Page 0, Register 5, D(3:0)
The D-divider value is 14-bits wide and is controlled by 2 registers. For proper update of the D-divider
value, Page 0, Register 7 must be programmed first followed immediately by Page 0, Register 8. Unless
the write to Page 0, Register 8 is completed, the new value of D will not take effect.
The clocks for codec and various signal processing blocks, CODEC_CLKIN can be generated from MCLK
input, BCLK input, GPIO input or PLL_CLK (Page 0/Register 4/D(1:0) ).
If the CODEC_CLKIN is derived from the PLL, then the PLL must be powered up first and powered down
last.
Table 5-25 lists several example cases of typical MCLK rates and how to program the PLL to achieve a
sample rate Fs of either 44.1kHz or 48kHz.
Table 5-25. PLL Example Configurations
Fs = 44.1kHz
MCLK (MHz)
PLLP
PLLR
PLLJ
PLLD
MADC
NADC
AOSR
MDAC
NDAC
DOSR
2.8224
1
3
10
0
3
5
128
3
5
128
5.6448
1
3
5
0
3
5
128
3
5
128
12
1
1
7
560
3
5
128
3
5
128
13
1
2
4
2336
13
3
64
4
6
104
16
1
1
5
2920
3
5
128
3
5
128
19.2
1
1
4
4100
3
5
128
3
5
128
48
4
1
7
560
3
5
128
3
5
128
2.048
1
3
14
0
2
7
128
7
2
128
3.072
1
4
7
0
2
7
128
7
2
128
4.096
1
3
7
0
2
7
128
7
2
128
6.144
1
2
7
0
2
7
128
7
2
128
8.192
1
4
3
0
2
8
128
4
4
128
Fs = 48kHz
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Table 5-25. PLL Example Configurations (continued)
Fs = 44.1kHz
MCLK (MHz)
PLLP
PLLR
PLLJ
PLLD
MADC
NADC
AOSR
MDAC
NDAC
DOSR
12
1
1
7
1680
2
7
128
7
2
128
16
1
1
5
3760
2
7
128
7
2
128
19.2
1
1
4
4800
2
7
128
7
2
128
48
4
1
7
1680
2
7
128
7
2
128
5.18 INTERFACE
5.18.1 AUDIO DIGITAL I/O INTERFACE
Audio data is transferred between the host processor and the TLV320AIC3254 via the digital audio data
serial interface, or audio bus. The audio bus on this device is very flexible, including left or right-justified
data options, support for I2S or PCM protocols, programmable data length options, a TDM mode for
multichannel operation, very flexible master/slave configurability for each bus clock line, and the ability to
communicate with multiple devices within a system directly.
The audio bus of the TLV320AIC3254 can be configured for left or right-justified, I2S, DSP, or TDM modes
of operation, where communication with standard telephony PCM interfaces is supported within the TDM
mode. These modes are all MSB-first, with data width programmable as 16, 20, 24, or 32 bits by
configuring Page 0, Register 27, D(5:4). In addition, the word clock and bit clock can be independently
configured in either Master or Slave mode, for flexible connectivity to a wide variety of processors. The
word clock is used to define the beginning of a frame, and may be programmed as either a pulse or a
square-wave signal. The frequency of this clock corresponds to the maximum of the selected ADC and
DAC sampling frequencies.
The bit clock is used to clock in and clock out the digital audio data across the serial bus. When in Master
mode, this signal can be programmed to generate variable clock pulses by controlling the bit-clock divider
in Page 0, Register 30 (see Figure 5-40). The number of bit-clock pulses in a frame may need adjustment
to accommodate various word-lengths as well as to support the case when multiple TLV320AIC3254s may
share the same audio bus.
The TLV320AIC3254 also includes a feature to offset the position of start of data transfer with respect to
the word-clock. This offset can be controlled in terms of number of bit-clocks and can be programmed in
Page 0, Register 28.
The TLV320AIC3254 also has the feature of inverting the polarity of the bit-clock used for transferring the
audio data as compared to the default clock polarity used. This feature can be used independently of the
mode of audio interface chosen. This can be configured via Page 0, Register 29, D(3).
The TLV320AIC3254 further includes programmability (Page 0, Register 27, D0) to 3-state the DOUT line
during all bit clocks when valid data is not being sent. By combining this capability with the ability to
program at what bit clock in a frame the audio data begins, time-division multiplexing (TDM) can be
accomplished, enabling the use of multiple codecs on a single audio serial data bus. When the audio
serial data bus is powered down while configured in master mode, the pins associated with the interface
are put into a 3-state output condition.
By default when the word-clocks and bit-clocks are generated by the TLV320AIC3254, these clocks are
active only when the codec (ADC, DAC or both) are powered up within the device. This is done to save
power. However, it also supports a feature when both the word clocks and bit-clocks can be active even
when the codec in the device is powered down. This is useful when using the TDM mode with multiple
codecs on the same bus, or when word-clock or bit-clocks are used in the system as general-purpose
clocks.
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5.18.1.1 Right Justified Mode
The Audio Interface of the TLV320AIC3254 can be put into Right Justified Mode by programming Page 0,
Register 27, D(7:6) = 10. In right-justified mode, the LSB of the left channel is valid on the rising edge of
the bit clock preceding the falling edge of the word clock. Similarly, the LSB of the right channel is valid on
the rising edge of the bit clock preceding the rising edge of the word clock.
1/fs
WCLK
BCLK
Left Channel
DIN/
DOUT
0
n-1 n-2 n-3
Right Channel
2
MSB
1
0
n-1 n-2 n-3
LSB
2
1
MSB
0
LSB
Figure 5-43. Timing Diagram for Right-Justified Mode
For Right-Justified mode, the number of bit-clocks per frame should be greater than twice the
programmed word-length of the data.
5.18.1.2 Left Justified Mode
The Audio Interface of the TLV320AIC3254 can be put into Left Justified Mode by programming Page 0,
Register 27, D(7:6) = 11. In left-justified mode, the MSB of the right channel is valid on the rising edge of
the bit clock following the falling edge of the word clock. Similarly the MSB of the left channel is valid on
the rising edge of the bit clock following the rising edge of the word clock.
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
N N N
- - 1 2 3
0
LD(n)
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n) = n'th sample of left channel data
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-44. Timing Diagram for Left-Justified Mode
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
0
LD(n)
LD(n) = n'th sample of left channel data
N N N
- - 1 2 3
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-45. Timing Diagram for Left-Justified Mode with Offset=1
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WORD
CLOCK
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LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
N N N
- - 1 2 3
0
LD(n)
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n) = n'th sample of left channel data
3
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-46. Timing Diagram for Left-Justified Mode with Offset=0 and inverted bit clock
For Left-Justified mode, the number of bit-clocks per frame should be greater than twice the programmed
word-length of the data. Also, the programmed offset value should be less than the number of bit-clocks
per frame by at least the programmed word-length of the data.
5.18.1.3 I2S Mode
The Audio Interface of the TLV320AIC3254 can be put into Right Justified Mode by programming Page 0,
Register 27, D(7:6) = to 00. In I2S mode, the MSB of the left channel is valid on the second rising edge of
the bit clock after the falling edge of the word clock. Similarly the MSB of the right channel is valid on the
second rising edge of the bit clock after the rising edge of the word clock.
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
N N N
- - 1 2 3
0
LD(n)
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n) = n'th sample of left channel data
3
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-47. Timing Diagram for I2S Mode
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
N
1
DATA
5
4
3
2
1
0
LD(n)
LD(n) = n'th sample of left channel data
N
1
5
4
3
2
1
N
1
0
RD(n)
5
LD (n+1)
RD(n) = n'th sample of right channel data
Figure 5-48. Timing Diagram for I2S Mode with offset=2
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WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
N N N
- - 1 2 3
0
LD(n)
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n) = n'th sample of left channel data
3
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-49. Timing Diagram for I2S Mode with offset=0 and bit clock invert
For I2S mode, the number of bit-clocks per channel should be greater than or equal to the programmed
word-length of the data. Also the programmed offset value should be less than the number of bit-clocks
per frame by at least the programmed word-length of the data.
5.18.1.4 DSP Mode
The Audio Interface of the TLV320AIC3254 can be put into Right Justified Mode by programming Page 0,
Register 27, D(7:6) = 01. In DSP mode, the falling edge of the word clock starts the data transfer with the
left channel data first and immediately followed by the right channel data. Each data bit is valid on the
falling edge of the bit clock.
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2
1
0
N N N
- - 1 2 3
LD(n)
3
2
1
N N N
- - 1 2 3
0
RD(n)
LD(n) = n'th sample of left channel data
3
LD (n+1)
RD(n) = n'th sample of right channel data
Figure 5-50. Timing Diagram for DSP Mode
WORD
CLOCK
LEFT CHANNEL
RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
2 1 0
LD(n)
LD(n) = n'th sample of left channel data
N N N
- - 1 2 3
3 2 1
0
RD(n)
N N N
- - 1 2 3
LD(n+1)
RD(n) = n'th sample of right channel data
Figure 5-51. Timing Diagram for DSP Mode with offset = 1
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WORD
CLOCK
LEFT CHANNEL
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RIGHT CHANNEL
BIT
CLOCK
DATA
N N N
- - 1 2 3
3
LD(n)
2
1
0
N N N
- - 1 2 3
3
2
1
0
N N N
- - 1 2 3
RD(n)
3
LD(n+1)
Figure 5-52. Timing Diagram for DSP Mode with offset = 1 and bit clock inverted
For DSP mode, the number of bit-clocks per frame should be greater than twice the programmed
word-length of the data. Also the programmed offset value should be less than the number of bit-clocks
per frame by at least the programmed word-length of the data.
5.18.1.5 Secondary I2S
The audio serial interface on the TLV320AIC3254 has an extensive IO control to allow communication
with two independent processors for audio data. Each processor can communicate with the device one at
a time. This feature is enabled by register programming of the various pin selections.
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BCLK
BCLK
BCLK
BCLK_INT
S_BCLK
S_BCLK
BCLK_OUT
WCLK
WCLK
WCLK
DAC_WCLK_INT
S_WCLK
DAC_FS
S_WCLK
ADC_FS
DIN
DOUT
WCLK
ADC_WCLK_INT
DOUT_int
DOUT
DIN
Audio
Digital
Serial
Interface
ADC_WCLK
S_DIN
Primary
Audio
Processor
DIN
DIN_INT
GPIO
SCLK
S_DIN
ADC_WCLK
ADC_FS
MISO
GPIO
SCLK
BCLK
BCLK2
S_BCLK
BCLK_OUT
DOUT
Secondary
Audio
Processor
BCLK_OUT
GPIO
DAC_FS
SCLK
WCLK
BCLK
MISO
S_WCLK
WCLK2
Clock
Generation
WCLK
MISO
DAC_FS
DOUT
ADC_FS
ADC_FS
GPIO
S_DIN
DOUT
SCLK
DOUT_int
MISO
DIN
(S_DOUT)
DIN
Figure 5-53. Audio Serial Interface Multiplexing
The secondary audio interface uses multifunction pins. For an overview on multifunction pins please see
Section 5.2.5. Figure 5-53 illustrates possible audio interface routing. The multifunction pins SCLK and
MISO are only available in I2C communication mode.
This multiplexing capability allows the TLV320AIC3254 to communicate with two separate devices with
independent I2S/PCM busses, one at a time.
5.18.2 CONTROL INTERFACE
The TLV320AIC3254 control interface supports SPI or I2C communication protocols, with the protocol
selectable using the SPI_SELECT pin. For SPI, SPI_SELECT should be tied high; for I2C, SPI_SELECT
should be tied low. It is not recommended to change the state of SPI_SELECT during device operation.
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5.18.2.1 I2C CONTROL MODE
The TLV320AIC3254 supports the I2C control protocol, and will respond to the I2C address of 0011000.
I2C is a two-wire, open-drain interface supporting multiple devices and masters on a single bus. Devices
on the I2C bus only drive the bus lines LOW by connecting them to ground; they never drive the bus lines
HIGH. Instead, the bus wires are pulled HIGH by pullup resistors, so the bus wires are HIGH when no
device is driving them LOW. This way, two devices cannot conflict; if two devices drive the bus
simultaneously, there is no driver contention.
Communication on the I2C bus always takes place between two devices, one acting as the master and the
other acting as the slave. Both masters and slaves can read and write, but slaves can only do so under
the direction of the master. Some I2C devices can act as masters or slaves, but the TLV320AIC3254 can
only act as a slave device.
An I2C bus consists of two lines, SDA and SCL. SDA carries data, and the SCL signal provides the clock.
All data is transmitted across the I2C bus in groups of eight bits. To send a bit on the I2C bus, the SDA line
is driven to the appropriate level while SCL is LOW (a LOW on SDA indicates the bit is zero, while a HIGH
indicates the bit is one).
Once the SDA line has settled, the SCL line is brought HIGH, then LOW. This pulse on the SCL line
clocks the SDA bit into the receiver’s shift register.
The I2C bus is bidirectional: the SDA line is used both for transmitting and receiving data. When a master
reads from a slave, the slave drives the data line; when a master sends to a slave, the master drives the
data line.
Most of the time the bus is idle, no communication is taking place, and both lines are HIGH. When
communication is taking place, the bus is active. Only master devices can start communication on the bus.
Normally, the data line is only allowed to change state while the clock line is LOW. If the data line changes
state while the clock line is HIGH, it is either a START condition or its counterpart, a STOP condition. A
START condition is when the clock line is HIGH and the data line goes from HIGH to LOW. A STOP
condition is when the clock line is HIGH and the data line goes from LOW to HIGH.
After the master issues a START condition, it sends a byte that selects the slave device for
communication. This byte is called the address byte. Each device on an I2C bus has a unique 7-bit
address to which it responds. (Slaves can also have 10-bit addresses; see the I2C specification for
details.) The master sends an address in the address byte, together with a bit that indicates whether it
wishes to read from or write to the slave device.
Every byte transmitted on the I2C bus, whether it is address or data, is acknowledged with an
acknowledge bit. When a master has finished sending a byte (eight data bits) to a slave, it stops driving
SDA and waits for the slave to acknowledge the byte. The slave acknowledges the byte by pulling SDA
LOW. The master then sends a clock pulse to clock the acknowledge bit. Similarly, when a master has
finished reading a byte, it pulls SDA LOW to acknowledge this to the slave. It then sends a clock pulse to
clock the bit. (Remember that the master always drives the clock line.)
A not-acknowledge is performed by simply leaving SDA HIGH during an acknowledge cycle. If a device is
not present on the bus, and the master attempts to address it, it will receive a not–acknowledge because
no device is present at that address to pull the line LOW.
When a master has finished communicating with a slave, it may issue a STOP condition. When a STOP
condition is issued, the bus becomes idle again. A master may also issue another START condition. When
a START condition is issued while the bus is active, it is called a repeated START condition.
The TLV320AIC3254 can also respond to and acknowledge a General Call, which consists of the master
issuing a command with a slave address byte of 00H. This feature is disabled by default, but can be
enabled via Page 0, Register 34, Bit D(5).
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SCL
DA(6)
SDA
Start
(M)
DA(0)
7-bit Device Address
(M)
RA(7)
Write
(M)
Slave
Ack
(S)
RA(0)
8-bit Register Address
(M)
D(7)
Slave
Ack
(S)
D(0)
8-bit Register Data
(M)
Slave
Ack
(S)
Stop
(M)
(M) => SDA Controlled by Master
(S) => SDA Controlled by Slave
Figure 5-54. I2C Write
SCL
DA(6)
SDA
Start
(M)
DA(0)
7-bit Device Address
(M)
RA(7)
Write
(M)
Slave
Ack
(S)
DA(6)
RA(0)
8-bit Register Address
(M)
Slave
Ack
(S)
Repeat
Start
(M)
DA(0)
7-bit Device Address
(M)
D(7)
Read
(M)
Slave
Ack
(S)
8-bit Register Data
(S)
D(0)
Master
No Ack
(M)
Stop
(M)
(M) => SDA Controlled by Master
(S) => SDA Controlled by Slave
Figure 5-55. I2C Read
In the case of an I2C register write, if the master does not issue a STOP condition, then the device enters
auto-increment mode. So in the next eight clocks, the data on SDA is treated as data for the next
incremental register.
Similarly, in the case of an I2C register read, after the device has sent out the 8-bit data from the
addressed register, if the master issues a ACKNOWLEDGE, the slave takes over control of SDA bus and
transmit for the next 8 clocks the data of the next incremental register.
5.18.2.2 SPI DIGITAL INTERFACE
In the SPI control mode, the TLV320AIC3254 uses the pins SCL/SSZ=SSZ, SCLK=SCLK, MISO=MISO,
SDA/MOSI=MOSI as a standard SPI port with clock polarity setting of 0 (typical microprocessor SPI
control bit CPOL = 0). The SPI port allows full-duplex, synchronous, serial communication between a host
processor (the master) and peripheral devices (slaves). The SPI master (in this case, the host processor)
generates the synchronizing clock (driven onto SCLK) and initiates transmissions. The SPI slave devices
(such as the TLV320AIC3254) depend on a master to start and synchronize transmissions. A transmission
begins when initiated by an SPI master. The byte from the SPI master begins shifting in on the slave
MOSI pin under the control of the master serial clock (driven onto SCLK). As the byte shifts in on the
MOSI pin, a byte shifts out on the MISO pin to the master shift register.
The TLV320AIC3254 interface is designed so that with a clock-phase bit setting of 1 (typical
microprocessor SPI control bit CPHA = 1), the master begins driving its MOSI pin and the slave begins
driving its MISO pin on the first serial clock edge. The SSZ pin can remain low between transmissions;
however, the TLV320AIC3254 only interprets the first 8 bits transmitted after the falling edge of SSZ as a
command byte, and the next 8 bits as a data byte only if writing to a register. Reserved register bits
should be written to their default values. The TLV320AIC3254 is entirely controlled by registers. Reading
and writing these registers is accomplished by an 8-bit command sent to the MOSI pin of the part prior to
the data for that register. The command is structured as shown in Section 5.18.2.3. The first 7 bits specify
the register address which is being written or read, from 0 to 127 (decimal). The command word ends with
an R/W bit, which specifies the direction of data flow on the serial bus. In the case of a register write, the
R/W bit should be set to 0. A second byte of data is sent to the MOSI pin and contains the data to be
written to the register. Reading of registers is accomplished in similar fashion. The 8-bit command word
sends the 7-bit register address, followed by R/W bit = 1 to signify a register read is occurring. The 8-bit
register data is then clocked out of the part on the MISO pin during the second 8 SCLK clocks in the
frame.
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Table 5.18.2.3.
COMMAND WORD
Bit 7
ADDR(6)
Bit 6
ADDR(5)
Bit 5
ADDR(4)
Bit 4
ADDR(3)
Bit 3
ADDR(2)
Bit 2
ADDR(1)
Bit 1
ADDR(0)
Bit 0
R/WZ
SSZ
SCLK
MOSI
A6
A5
A0
D7
D6
D1
D0
MISO
Figure 5-56. SPI Timing Diagram for Register Write
SSZ
SCLK
MOSI
MISO
A6
A5
A0
D7
D6
D1
D0
D7
D6
D1
D0
Figure 5-57. SPI Timing Diagram for Register Read
5.19 POWER
The TLV320AIC3254 has four power-supply connections which allow various optimizations for low system
power. The four supply pins are LDOin, DVdd, AVdd and IOVDD.
• IOVdd - The IOVdd pin supplies the digital IO cells of the device. The voltage of IOVdd can range from
1.1 to 3.6V and is determined by the digital IO voltage of the rest of the system.
• DVdd - This pin is either a supply input to the device, or if the internal LDO is used it is used to
connect an external capacitor. It supplies the digital core of the device. Lower DVdd voltages cause
lower power dissipation. If efficient switched-mode power supplies are used in the system, system
power can be optimized using low DVdd voltages. The device will offer full functionality up to the
highest specified clock frequencies for DVdd values of 1.65 to 1.95V.
• AVdd - This pin is either a supply input to the device, or if the internal LDO is used it is used to
connect an external capacitor. It supplies the analog core of the device. The analog core voltage
(AVdd) may be in the range of 1.5 to 1.95V for specified performance. For AVdd voltages above 1.8V,
the internal common mode voltage can be set to 0.9V (Pg 1, Reg 10, D(6)=0, default) resulting in
500mVrms full-scale voltage internally. For AVdd voltages below 1.8V, the internal common mode
voltage should be set to 0.75V (Pg 1, Reg 10, D(6)=1), resulting in 375mVrms internal full scale
voltage. At powerup, AVDD is weakly connected to DVDD. This coarse AVDD generation must be
turned off by writing Pg 1, Reg 1, D(3) = 1 at the time AVDD is applied, either from internal LDO or
through external LDO.
• LDOin - The LDOin pin serves two main functions. It serves as supply to internal LDOs as well as to
the analog-output amplifiers of the device. The LDOin voltage can range from 1.9V to 3.6V. In
conjunction with the two internal LDOs for AVdd and DVdd the device can run from a single supply.
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For cases where high output voltages from the line out amplifiers (1Vrms) or high output power from
the headphone amplifier is required, the LDOin voltage is used as a supply.
5.19.1 System Level Considerations
While there is flexibility in supplying the device through multiple options of power supplies, care must be
taken to stay within safe areas when going to standby and shutdown modes.
In summary, the lowest shutdown current is achieved when all supplies to the device are turned off,
implying that all settings must be reapplied to the device after bringing the power back up. In order to
retain settings in the device, the DVdd voltage and either internally or externally the AVdd voltage also
must be maintained. In this case the TLV320AIC3254 exhibits shutdown currents of below 1µA.(If DVdd is
generated by internal LDO, add 50µA)
5.19.1.1 Supply from single voltage rail (1.9 to 3.6V)
The device can be powered directly from a single 3.3V rail through the LDOin pin. During operation the
DVdd LDO is activated via the LDO_select pin, and the AVdd LDO is activated via control registers (Pg 1,
Reg 2, D(0)=1).
5.19.1.1.1 Standby Mode (3.3V operation)
To put the device in standby mode, the AVdd and DVdd LDOs as well as the Reference Block (Pg 1, Reg
123, D(2:0) = 101) must stay on, and all other blocks powered down. This results in a standby current of
approximately 180µA. In standby mode, the device responds quickly to playback requests.
5.19.1.1.2 Sleep Mode (3.3V operation)
In this mode all settings and memory content of the device are retained. To put the device into sleep
mode, the DVdd LDO must remain powered up (LDO_select pin), the AVdd LDO must be powered down
(Pg 1, Reg 2, D(0)=0), the crude AVdd generation must be turned on (Pg 1, Reg 1, D(3)=0) and the
analog blocks must be powered down (Pg 1, Reg 2, D(3)=1). The sleep-mode power consumption is
approximately 50µA
5.19.1.1.3 Shutdown Mode
To shutdown the device, the external supply can be turned off completely.
5.19.1.2 Supply from single voltage rail (1.8V).
If a single 1.8V rail is used, generating the 1.8V from a higher battery voltage via a DC-DC converter
results in good system-level efficiency. In this setup, the line-output voltage is limited to 500mVrms, and
the maximum headphone output power is 15mW into 16Ω.
The 1.8V rail can be connected directly to the DVdd pin (LDO_select pin connected to ground) and also
supply the digital core voltage. Connecting the 1.8V rail to the AVdd pin will make the device function, but
the achievable performance is a function of the voltage ripple typically found on DC-DC converter outputs.
To achieve specified performance, an external low-input-voltage 1.6V LDO must be connected between
the 1.8V rail and the AVdd input.
During operation, the DVdd and AVdd LDOs are deactivated (LDO_select pin and via control register Pg
1, Reg 2, D(0)=0). In this case the LDOin pin should be connected to DVdd.
5.19.1.2.1 Standby Mode (1.8V operation)
To put the device in standby mode, both external voltages (AVdd and DVdd) and the reference block
inside the TLV320AIC3254 must stay on (Pg 1, Reg 123, D(2:0) = 101), all other blocks should be
powered down. This results in standby current of approximately 50µA.
In standby mode the device responds very quickly to playback requests.
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5.19.1.2.2 Sleep Mode (1.8V operation)
In this mode, all settings and memory content of the device is retained. To put the device into sleep mode,
the external DVdd must remain powered up, the external AVdd LDO must be powered down, the crude
AVdd generation must be turned on (Pg 1, Reg 1, D(3)=0) and the analog blocks must be powered down
(Pg 1, Reg 2, D(3)=1). The device's sleep mode power consumption in this case is < 1µA
5.19.1.2.3 Shutdown Mode
To shut down the device, the external supplies can be turned off completely. If the 1.8V rail cannot be
turned off, the crude AVdd generation must be turned on (Pg 1, Reg 1, D(3)=0) and the analog blocks
must be powered down (Pg 1, Reg 2, D(3)=1). This results in a device shutdown current < 1µA.
5.19.1.3 Other Supply Options
There are other options to power the device. Apply the following rules:
• During normal operation all supply pins must be connected to a supply (via internal LDO or external)
• Whenever the LDOin supply is present,
– DVdd supply must be present as well
– If AVdd supply is not present, then the crude internal AVdd generation must be turned on (Pg 1,
Reg 1, D(3)=0)
• Whenever the DVdd supply is on, and either AVdd or LDOin or both supplies are off, the analog blocks
must be powered down (Pg 1, Reg 2, D(3)=1)
5.20 REFERENCE
All data converters require a DC reference voltage. The TLV320AIC3254 achieves its low-noise
performance by internally generating a low-noise reference voltage. This reference voltage is generated
using a band-gap circuit with a good PSRR performance. This reference voltage must be filtered
externally using a minimum 1µF capacitor connected from the REF pin to analog ground (AVss).
To achieve low power consumption, this reference block is powered down when all analog blocks inside
the device are powered down. In this condition, the REF pin is 3-stated. On powerup of any analog block,
the reference block is also powered up and the REF pin settles to its steady-state voltage after the settling
time (a function of the de-coupling capacitor on the REF pin). This time is approximately equal to 1 second
when using a 1µF decoupling capacitor. In the event that a faster power-up is required, either the
reference block can be kept powered up (even when no other analog block is powered up) by
programming Page 1, Register 123, D(2) = 1. However, in this case, an additional 125µA of current from
DVdd and 105µA of current from AVdd is consumed. Additionally, to achieve a faster powerup, a
fast-charge option is also provided where the charging time can be controlled between 40ms and 120ms
by programming Page 1, Register 123, D(1:0). By default, the fast charge option is disabled.
5.21 SETTING DEVICE COMMON MODE
The TLV320AIC3254 allows the user to set the common mode voltage for analog inputs to 0.75V or 0.9V
by programming Page 1, Register 10, D(6). The input common-mode voltage of 0.9V works best when the
analog supply voltage is centered around 1.8V or above, and offers the highest possible performance. For
analog supply voltages below 1.8V, a common mode voltage of 0.75V must be used.
Table 5-26. Input Common Mode voltage and Input Signal Swing
Input Common Mode
Voltage (V)
96
AVdd (V)
Channel Gain (dB)
Single-Ended Input
Swing for 0dBFS output
signal (VRMS)
Differential Input Swing
for 0dBFS output signal
(VRMS)
0.75
>1.5
0
0.375
0.75
0.90
1.8 … 1.95
0
0.5
1.0
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The choice of input common mode of 0.75V allows the use of PowerTune mode PTM_R1 which results in
significantly lower power dissipation. (see Section 5.6) An input common-mode voltage of 0.9V allows the
user to maximize the signal swings and SNR.
NOTE
The input common mode setting is common for ADC record, DAC playback and Analog
Bypass path
5.22 DEVICE SPECIAL FUNCTIONS
5.22.1 Headset Detection
The TLV320AIC3254 includes extensive capability to monitor a headphone, microphone, or headset jack,
to determine if a plug has been inserted into the jack, and then determine what type of
headset/headphone is wired to the plug. The device also includes the capability to detect a button press,
even, for example, when starting calls on mobile phones with headsets. This feature is available while
using I2C protocol for control interface. The figure shows the circuit configuration to enable this feature.
1
s
g
s
3
s
HPR
g
HPL
s
Micpga
m
m
SCLK
MICBIAS
Micbias
Figure 5-58. Jack Connections for Headset Detection
This feature is enabled by programming Page 0, Register 67, D(1). In order to avoid false detections due
to mechanical vibrations in headset jacks or microphone buttons, a debounce function is provided for
glitch rejection. For the case of headset insertion, a debounce function with a range of 32ms - 512ms is
provided. This can be programmed via Page 0, Register 67, D(4:2). For improved button-press detection,
the debounce function has a range of 8ms to 32ms by programming Page 0, Register 67, D(1:0).
The TLV320AIC3254 also provides feedback to user when a button press, or a headset insertion/removal
event is detected through register readable flags as well as an interrupt on the IO pins. The value in Page
0, Register 45, D(5:4) provides the instantaneous state of button press and headset insertion. Page 0,
Register 44, D(5) is a sticky (latched) flag that is set when the button-press event is detected. Page 0,
Register 44, D(4) is a sticky flag which is set when the headset insertion or removal event is detected.
These sticky flags are set by the event occurrence, and are reset only when read. This requires polling
Page 0, Register 44. To avoid polling and the associated overhead, the TLV320AIC3254 also provides an
interrupt feature where the events can trigger the INT1 and/or INT2 interrupts. These interrupt events can
be routed to one of the digital output pins. Please refer to Section 5.22.2 for details.
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The TLV320AIC3254 not only detects a headset insertion event, but also is able to distinguish between
the different headsets inserted such as stereo headphones or cellular headphones. After the
headset-detection event, the user can read Page 0, Register 67, D(6:5) to determine the type of headset
inserted.
Table 5-27. Headset Detection Block Registers
Register
Description
Page 0, Register 67, D(1)
Headset Detection Enable/Disable
Page 0, Register 67, D(4:2)
Debounce Programmability for Headset Detection
Page 0, Register 67, D(1:0)
Debounce Programmability for Button Press
Page 0, Register 44, D(5)
Sticky Flag for Button Press Event
Page 0, Register 44, D(4)
Sticky Flag for Headset Insertion or Removal Event
Page 0, Register 45, D(5)
Status Flag for Button Press Event
Page 0, Register 45, D(4)
Status Flag for Headset Insertion and Removal
Page 0, Register 67, D(6:5)
Flags for type of Headset Detected
The headset detection block requires AVdd to be powered and Master Analog Power control in Page 1,
Register 2, D(3) to be enabled. The headset detection feature in the TLV320AIC3254 is achieved with a
very low power overhead, requiring less than 20µA of additional current from AVdd supply.
5.22.2 Interrupts
Some specific events in the TLV320AIC3254 which may require host processor intervention, can be used
to trigger interrupts to the host processor. This avoids polling the status-flag registers continuously. The
TLV320AIC3254 has two defined interrupts; INT1 and INT2 that can be configured by programming Page
0, Register 48 and 49. A user can configure the interrupts INT1 and INT2 to be triggered by one or many
events such as
• Headset Detection
• Button Press
• DAC DRC Signal exceeding Threshold
• Noise detected by AGC
• Over-current condition in headphones
• Data Overflow in ADC and DAC Processing Blocks and Filters and
• DC Measurement Data Available
Each of these INT1 and INT2 interrupts can be routed to output pins like GPIO, DOUT and MISO by
configuring the respective output control registers in Page 0, Register 52, 53 and 55. These interrupt
signals can either be configured as a single pulse or a series of pulses by programming Page 0, Register
48, D(0) and Page 0, Register 49, D(0). If the user configures the interrupts as a series of pulses, the
events will trigger the start of pulses that will stop when the flag registers in Page 0, Register 42, 44 and
45 are read by the user to determine the cause of the interrupt.
5.23 EXAMPLE SETUPS
The following example setups can be taken directly for the TLV320AIC3254 EVM setup.
The # marks a comment line, w marks an I2C write command followed by the device address, the I2C
register address and the value.
5.23.1 Stereo DAC Playback with 48ksps Sample Rate and High Performance.
Assumption
AVdd = 1.8V, DVdd = 1.8V
MCLK = 12.288MHz
Ext C = 47uF
Based on C the wait time will change.
Wait time = N*Rpop*C + 4* Offset ramp time
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Default settings used.
PLL Disabled
DOSR 128
# Initialize to Page 0
w 30 00 00
# Initialize the device through software reset
w 30 01 01
# Power up the NDAC divider with value 1
w 30 0b 81
# Power up the MDAC divider with value 2
w 30 0c 82
# Program the OSR of DAC to 128
w 30 0d 00
w 30 0e 80
# Set the word length of Audio Interface to 20bits PTM_P4
w 30 1b 10
# Set the DAC Mode to PRB_P8
w 30 3c 08
# Select Page 1
w 30 00 01
# Disable Internal Crude AVdd in presence of external AVdd supply or before
#powering up internal AVdd LDO
w 30 01 08
# Enable Master Analog Power Control
w 30 02 00
# Set the REF charging time to 40ms
w 30 7b 01
# HP soft stepping settings for optimal pop performance at power up
# Rpop used is 6k with N = 6 & soft step = 20usec. This should work with 47uF coupling
# capacitor. Can try N=5,6 or 7 time constants as well. Trade-off delay vs “pop” sound.
w 30 14 25
# Set the Input Common Mode to 0.9V and Output Common Mode for Headphone to
# Input Common Mode
w 30 0a 00
# Route Left DAC to HPL
w 30 0c 08
# Route Right DAC to HPR
w 30 0d 08
# Set the DAC PTM mode to PTM_P3/4
w 30 03 00
w 30 04 00
# Set the HPL gain to 0dB
w 30 10 00
# Set the HPR gain to 0dB
w 30 11 00
# Power up HPL and HPR drivers
w 30 09 30
# Wait for 2.5 sec for soft stepping to take effect
# Else read Page 1, Register 63d, D(7:6). When = “11” soft-stepping is complete
# Select Page 0
w 30 00 00
# Power up the Left and Right DAC Channels with route the Left Audio digital data to
# Left Channel DAC and Right Audio digital data to Right Channel DAC
w 30 3f d6
# Unmute the DAC digital volume control
w 30 40 00
5.23.2 Stereo DAC Playback with 48ksps Sample Rate and Low Power Mode
Assumption
AVdd = 1.8V, DVdd = 1.8V
MCLK = 12.288MHz
Ext C = 47µF
Based on C the wait time will change.
Wait time = N*Rpop*C + 4* Offset ramp time
Default settings used.
PLL Disabled
# Initialize to Page 0
w 30 00 00
# Initialize the device through software reset
w 30 01 01
# Power up the NDAC divide with value 1
w 30 0b 81
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#
w
#
w
w
#
w
#
w
#
#
w
#
w
#
w
#
#
#
w
#
#
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Power up the MDAC divider with value 4
30 0c 84
Program the OSR of DAC to 64
30 0d 00
30 0e 40
Set the DAC Mode to PRB_P8
30 3c 08
Select Page 1
30 00 01
Disable Internal Crude AVdd in presence of external AVdd supply or before
powering up internal AVdd LDO
30 01 08
Enable Master Analog Power Control
30 02 00
Set the REF charging time to 40ms
30 7b 01
HP soft stepping settings for optimal pop performance at power up
Rpop used is 6k with N = 6 & soft step = 20usec. This should work with 47uF coupling
capacitor. Can try N=5,6 or 7 time constants as well. Trade-off delay vs “pop” sound.
30 14 25
Set the Input Common Mode to 0.9V and Output Common Mode for Headphone to
Input Common Mode
30 0a 00
Route Left DAC to HPL
30 0c 08
Route Right DAC to HPR
30 0d 08
Set the DAC PTM mode to PTM_P1
30 03 08
30 04 08
Set the HPL gain to 0dB
30 10 00
Set the HPR gain to 0dB
30 11 00
Power up HPL and HPR drivers
30 09 30
Wait for 2.5 sec for soft stepping to take effect
Else read Page 1, Register 63d, D(7:6). When = “11” soft-stepping is complete
Select Page 0
30 00 00
Power up the Left and Right DAC Channels with route the Left Audio digital data to
Left Channel DAC and Right Audio digital data to Right Channel DAC
30 3f d6
Unmute the DAC digital volume control
30 40 00
5.23.3 DAC Playback Through Class-D Headphone Amplifiers
Power Up
# Assumption DAC_FS = 48000Hz
# MCLK = 24.576MHz
# I2S Interface in Slave Mode
100
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Initialize to Page 0
30 00 00
Initialize the device through software reset
30 01 01
Power up the NDAC divider with value 1
30 0B 81
Power up the MDAC divider with value 4
For Class-D mode, MDAC = I*4
30 0C 84
Program the OSR of DAC to 128
30 0D 00
30 0E 80
Set the DAC Mode to PRB_P1v
30 3C 01
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Select Page 1
30 00 01
Disable Internal Crude AVdd in presence of external AVdd supply or before
powering up internal AVdd LDO
30 01 08
Application Information
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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Enable Master Analog Power Control
30 02 00
Set the REF charging time to 40ms
30 7B 01
HP soft stepping settings for optimal pop performance at power up
Rpop used is 6k with N = 6 & soft step = 0
30 14 25
Set the Input Common Mode to 0.9V and Output Common Mode for Headphone to
Input Common Mode
30 0A 00
Route Left DAC to HPL
30 0C 08
Route Right DAC to HPR
30 0D 08
Unmute HPL driver
30 10 00
Unmute HPR driver
30 11 00
Power up HPL and HPR drivers
30 09 30
switch to Page 0
30 00 00
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Wait for soft stepping to take effect
L&R DAC powerup Ldata-LDAC Rdata-RDAC
30 3F d4
Left and Right DAC unmuted with indep. vol. ctrl
30 40 00
# Wait for DAC vol ctrl soft-stepping to complete
# Select Page 1
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Enable Class-D mode for HPL output
30 03 C0
Enable Class-D mode for HPR output
30 04 C0
Power down HPL and HPR drivers
30 09 00
Power Down
# Select Page 0
w 30 00 00
# Mute the DAC digital volume control
w 30 40 0d
# Power down the DAC
W 30 3F C0
# Disable Class-D mode for HPL output
w 30 03 00
# Disable Class-D mode for HPL output
w 30 04 00
5.23.4 Stereo ADC with 48ksps Sample Rate and High Performance
Assumption
AVdd = 1.8V, DVdd = 1.8V
MCLK = 12.288MHz
Default settings used.
PLL Disabled
I2S Interface with 16bit Word Length.
AOSR 128
PRB_R1
PTM_R4
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Initialize to Page 0
30 00 00
S/W Reset to initialize all registers
30 01 01
Power up NADC divider with value 1
30 12 81
Power up MADC divider with value 2
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Application Information
101
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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30 13 82
Program OSR for ADC to 128
30 14 80
Select ADC PRB_R1
30 3d 01
Select Page 1
30 00 01
Disable Internal Crude AVdd in presence of external AVdd supply or before
powering up internal AVdd LDO
30 01 08
Enable Master Analog Power Control
30 02 00
Set the input common mode to 0.9V
30 0a 00
Select ADC PTM_R4
30 3d 00
Set MicPGA startup delay to 3.1ms
30 47 32
Set the REF charging time to 40ms
30 7b 01
Route IN1L to LEFT_P with 20K input impedance
30 34 80
Route Common Mode to LEFT_M with impedance of 20K
30 36 80
Route IN1R to RIGHT_P with input impedance of 20K
30 37 80
Route Common Mode to RIGHT_M with impedance of 20K
30 39 80
Unmute Left MICPGA, Gain selection of 6dB to make channel gain 0dB
Register of 6dB with input impedance of 20K => Channel Gain of 0dB
30 3b 0c
Unmute Right MICPGA, Gain selection of 6dB to make channel gain 0dB
Register of 6dB with input impedance of 20K => Channel Gain of 0dB
30 3c 0c
Select Page 0
30 00 00
Power up Left and Right ADC Channels
30 51 c0
Unmute Left and Right ADC Digital Volume Control.
30 52 00
5.23.5 Stereo ADC with 48ksps Sample Rate and Low Power
Assumption
AVdd = 1.8V, DVdd = 1.8V
MCLK = 12.288MHz
Default settings used.
PLL Disabled
I2S Interface with 16bit Word Length.
# Initialize to Page 0
w 30 00 00
# S/W Reset to initialize all registers
w 30 01 01
# Power up NADC divider with value 1
w 30 12 81
# Power up MADC divider with value 4
w 30 13 84
# Program OSR for ADC to 64
w 30 14 40
# Select ADC PRB_R7
w 30 3d 07
# Select Page 1
w 30 00 01
# Disable Internal Crude AVdd in presence of external AVdd supply or before
#powering up internal AVdd LDO
w 30 01 08
# Enable Master Analog Power Control
w 30 02 00
# Set the input common mode to 0.75V
w 30 0a 40
# Select ADC PTM_R1
w 30 3d ff
102
Application Information
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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Set MicPGA startup delay to 3.1ms
30 47 32
Set the REF charging time to 40ms
30 7b 01
Route IN1L to LEFT_P with 20K input impedance
30 34 80
Route Common Mode to LEFT_M with impedance of 20K
30 36 80
Route IN1R to RIGHT_P with input impedance of 20K
30 37 80
Route Common Mode to RIGHT_M with impedance of 20K
30 39 80
Unmute Left MICPGA, Gain selection of 6dB to make channel gain 0dB
Register of 6dB with input impedance of 20K => Channel Gain of 0dB
30 3b 0c
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Unmute Right MICPGA, Gain selection of 6dB to make channel gain 0dB
Register of 6dB with input impedance of 20K => Channel Gain of 0dB
30 3c 0c
Select Page 0
30 00 00
Power up Left and Right ADC Channels
30 51 c0
Unmute Left and Right ADC Digital Volume Control.
30 52 00
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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6 REGISTER MAP
TLV320AIC3254 contains 108 pages of 8-bit registers, each page can contain up to 128 registers. The
register pages are divided up based on functional blocks for this device. Page 0 is the default “home”
page after hardware reset.
6.1 Register Map Summary
Table 6-1. Summary of Register Map
PAGE NO.
DESCRIPTION
0
Configuration for Serial Interface, Digital IO, Clocking, ADC and DAC miniDSP configuration etc.
1
Configuration for Analog PGA’s, ADC, DAC, Output.Drivers, Volume controls etc
2-7
Reserved
8
ADC miniDSP adaptive filtering control and ADC Coefficient Buffer-A (0:29). Refer to Table 6-2 for more details.
9-16
ADC Coefficient Buffer-A (30:255). Refer to Table 6-2 and Table 6-4 for more details.
17-25
Reserved.
26-34
ADC Coefficient Buffer-B (0:255). Refer to Table 6-3 and Table 6-4 for more details.
35-43
Reserved.
44
DAC miniDSP adaptive filtering control and DAC Coefficient Buffer-A (0:29). Refer to Table 6-5 for more details.
45-52
DAC Coefficient BufferA (30:255). Refer Table 6-5 and Table 6-7 for more details.
53-61
Reserved.
62-70
DAC Coefficient BufferB C(0:255). Refer Table 6-6 and Table 6-7 for more details.
71-79
Reserved.
80-114
ADC miniDSP Instructions (0:1023). Refer Table 6-8 for more details.
115-151
Reserved.
152-186
DAC miniDSP Instructions (0:1023). Refer Table 6-9 for more details.
187-255
Reserved.
6.2 Register Map Details
6.2.1
Page 0 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
6.2.2
Page 0 / Register 1:
READ/
WRITE
RESET
VALUE
D7–D1
R
0000 000
D0
W
0
BIT
6.2.3
Page 0 / Register 2:
BIT
READ/
WRITE
D7–D0
R
104
REGISTER MAP
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
Software Reset Register
DESCRIPTION
Reserved, Write only default values
Self clearing software reset bit
0: Don't care
1: Self clearing software reset
Reserved Register
RESET
VALUE
DESCRIPTION
0XXX 0XXX Reserved, Write only default values
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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6.2.4
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Page 0 / Register 3:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
6.2.5
Page 0 / Register 4:
Reserved Register
DESCRIPTION
Reserved, Write only default values to this register
Clock Setting Register 1, Multiplexers
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved, Write only default values
D6
R/W
0
Select PLL Range
0: Low PLL Clock Range
1: High PLL Clock Range
D5–D4
R
00
Reserved, Write only default values any other value than reset value.
D3–D2
R/W
00
Select PLL Input Clock
00: MCLK pin is input to PLL
01: BCLK pin is input to PLL
10: GPIO pin is input to PLL
11: DIN pin is input to PLL
D1–D0
R/W
00
Select CODEC_CLKIN
00: MCLK pin is CODEC_CLKIN
01: BCLK pin is CODEC_CLKIN
10: GPIO pin is CODEC_CLKIN
11: PLL Clock is CODEC_CLKIN
BIT
6.2.6
Page 0 / Register 5:
DESCRIPTION
Clock Setting Register 2, PLL P&R Values
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D4
R/W
001
PLL divider P Value
000: P=8
001: P=1
010: P=2
…
110: P=6
111: P=7
D3–D0
R/W
0001
PLL divider R Value
000: Reserved, do not use
001: R=1
010: R=2
011: R=3
100: R=4
101…111: Reserved, do not use
6.2.7
BIT
Page 0 / Register 6:
READ/
WRITE
DESCRIPTION
PLL Power Up
0: PLL is powered down
1: PLL is powered up
Clock Setting Register 3, PLL J Values
RESET
VALUE
D7–D6
R
00
D5–D0
R/W
00 0100
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DESCRIPTION
Reserved. Write only default values any value other than default
PLL divider J value
00 0000…00 0011: Do not use
00 0100: J=4
00 0101: J=5
…
11 1110: J=62
11 1111: J=63
REGISTER MAP
105
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.8
Page 0 / Register 7:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R
00
D5–D0
R/W
00 0000
6.2.9
Clock Setting Register 4, PLL D Values (MSB)
DESCRIPTION
Reserved. Write only default values any value other than default
PLL divider D value (MSB)
PLL divider D value(MSB) &amp; PLL divider D value(LSB)
00 0000 0000 0000: D=0000
00 0000 0000 0001: D=0001
…
10 0111 0000 1110: D=9998
10 0111 0000 1111: D=9999
10 0111 0001 0000…11 1111 1111 1111: Do not use
Note: This register will be updated only when the Page-0, Reg-8 is written immediately after
Page-0, Reg-7
Page 0 / Register 8:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
Clock Setting Register 5, PLL D Values (LSB)
DESCRIPTION
PLL divider D value (LSB)
PLL divider D value(MSB) & PLL divider D value(LSB)
00 0000 0000 0000: D=0000
00 0000 0000 0001: D=0001
…
10 0111 0000 1110: D=9998
10 0111 0000 1111: D=9999
10 0111 0001 0000…11 1111 1111 1111: Do not use
Note: Page-0, Reg-8 should be written immediately after Page-0, Reg-7
6.2.10 Page 0 / Register 9-10:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
Reserved, Write only default values.
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
106
REGISTER MAP
Clock Setting Register 6, NDAC Values
DESCRIPTION
NDAC Divider Power Control
0: NDAC divider powered down
1: NDAC divider powered up
NDAC Value
000 0000: NDAC=128
000 0001: NDAC=1
000 0010: NDAC=2
…
111 1110: NDAC=126
111 1111: NDAC=127
Note: Please check the clock frequency requirements in the Overview section
6.2.12 Page 0 / Register 12:
BIT
Reserved Register
DESCRIPTION
6.2.11 Page 0 / Register 11:
BIT
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Clock Setting Register 7, MDAC Values
DESCRIPTION
MDAC Divider Power Control
0: MDAC divider powered down
1: MDAC divider powered up
MDAC Value
000 0000: MDAC=128
000 0001: MDAC=1
000 0010: MDAC=2
…
111 1110: MDAC=126
111 1111: MDAC=127
Note: Please check the clock frequency requirements in the Overview section
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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6.2.13 Page 0 / Register 13:
BIT
READ/
WRITE
RESET
VALUE
D7–D2
R
0000 00
D1–D0
R/W
00
DESCRIPTION
Reserved. Write only default values
DAC OSR (DOSR) Setting
DAC OSR(MSB) & DAC OSR(LSB)
00 0000 0000: DOSR=1024
00 0000 0001: DOSR=1
00 0000 0010: DOSR=2
…
11 1111 1110: DOSR=1022
11 1111 1111: DOSR=1023
Note: This register is updated when Page-0, Reg-14 is written to immediately after Page-0, Reg-13
6.2.14 Page 0 / Register 14:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
1000 0000
READ/
WRITE
RESET
VALUE
D7
R
0
D6–D0
R/W
000 0010
DAC OSR (DOSR) Setting
DAC OSR(MSB) & DAC OSR(LSB)
00 0000 0000: DOSR=1024
00 0000 0001: DOSR=1
00 0000 0010: DOSR=2
…
11 1111 1110: DOSR=1022
11 1111 1111: DOSR=1023
Note: This register should be written immediately after Page-0, Reg-13
BIT
RESET
VALUE
D7–D0
R/W
0000 0000
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DAC miniDSP instruction control Register 1
DESCRIPTION
Reserved. Write only default value
DAC miniDSP IDAC (14:8) setting. Use when DAC miniDSP is in use for signal processing (page
0,Reg 60)
DAC miniDSP IDAC(14:0)
000 0000 0000 0000: DAC miniDSP IDAC = 32768
000 0000 0000 0001: DAC miniDSP IDAC = 1
000 0000 0000 0010: DAC miniDSP IDAC = 2
…
…
111 1111 1111 1110: DAC miniDSP IDAC = 32766
111 1111 1111 1111: DAC miniDSP IDAC = 32767
Note: IDAC should be a integral multiple of INTERP ( Page-0, Reg-17, D3-D0 )
Note: Page-0, Reg-15 takes effect after programming Page-0, Reg-16 in the immediate next
control command
6.2.16 Page 0 / Register 16:
READ/
WRITE
DAC OSR Setting Register 2, LSB Value
DESCRIPTION
6.2.15 Page 0 / Register 15:
BIT
DAC OSR Setting Register 1, MSB Value
DAC miniDSP instruction control Register 2
DESCRIPTION
DAC miniDSP IDAC (7:0) setting. Use when DAC miniDSP is in use for signal processing (page
0,Reg 60)
DAC miniDSP IDAC(14:0)
000 0000 0000 0000: DAC miniDSP IDAC = 32768
000 0000 0000 0001: DAC miniDSP IDAC = 1
000 0000 0000 0010: DAC miniDSP IDAC = 2
…
…
111 1111 1111 1110: DAC miniDSP IDAC = 32766
111 1111 1111 1111: DAC miniDSP IDAC = 32767
Note: IDAC should be a integral multiple of INTERP ( Page-0, Reg-17, D3-D0 )
Note: Page-0, Reg-16 should be programmed immediately after Page-0, Reg-15
REGISTER MAP
107
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.17 Page 0 / Register 17:
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DAC miniDSP Interpolation Factor Setting Register
BIT
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
Reserved. Write only default values
D3–D0
R/W
1000
DAC miniDSP interpolation factor setting.
Used when DAC miniDSP is in use for signal processing (page 0,Reg 60)
0000 : Interpolation factor in DAC miniDSP(INTERP) = 16
0001: Interpolation factor in DAC miniDSP(INTERP)= 1
0010: Interpolation factor in DAC miniDSP(INTERP) = 2
…
1110: Interpolation factor in DAC miniDSP(INTERP) = 14
1111: Interpolation factor in DAC miniDSP(INTERP) = 15
DESCRIPTION
6.2.18 Page 0 / Register 18:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
DESCRIPTION
NADC Clock Divider Power Control
0: NADC divider powered down, ADC_CLK is same as DAC_CLK
1: NADC divider powered up
NADC Value
000 0000: NADC=128
000 0001: NADC=1
…
111 1110: NADC=126
111 1111: NADC=127
6.2.19 Page 0 / Register 19:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
READ/
WRITE
RESET
VALUE
D7–D0
R/W
1000 0000
MADC Clock Divider Power Control
0: MADC divider powered down, ADC_MOD_CLK is same as DAC_MOD_CLK
1: MADC divider powered up
MADC Value
000 0000: MADC=128
000 0001: MADC=1
…
111 1110: MADC=126
111 1111: MADC=127
108
READ/
WRITE
RESET
VALUE
D7
R
0
REGISTER MAP
ADC Oversampling (AOSR) Register
DESCRIPTION
ADC Oversampling Value
0000 0000: ADC AOSR = 256
0000 0001: ADC AOSR = 1
0000 0010: ADC AOSR = 2
...
0010 0000: ADC AOSR=32 (Use with PRB_R13 to PRB_R18, ADC Filter Type C)
...
0100 0000: AOSR=64 (Use with PRB_R1 to PRB_R12, ADC Filter Type A or B)
...
1000 0000: AOSR=128 (Use with PRB_R1 to PRB_R6, ADC Filter Type A)
...
1111 1110: ADC AOSR = 254
1111 1111: ADC AOSR = 255
Note: If the ADC miniDSP will be used for signal processing ADC (Pg 0, Reg 61) AOSR should be
an integral multiple of ADC DECIM factor.
6.2.21 Page 0 / Register 21:
BIT
Clock Setting Register 9, MADC Values
DESCRIPTION
6.2.20 Page 0 / Register 20:
BIT
Clock Setting Register 8, NADC Values
ADC miniDSP instruction control Register 1
DESCRIPTION
Reserved. Write only default values
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D0
R/W
000 0001
DESCRIPTION
ADC miniDSP IADC (14:8) setting. Use when ADC miniDSP is in use for signal processing (page
0,Reg 61)
ADC miniDSP IADC(14:0)
000 0000 0000 0000: ADC miniDSP IADC=32768
000 0000 0000 0001: ADC miniDSP IADC = 1
000 0000 0000 0010: ADC miniDSP IADC = 2
…
…
111 1111 1111 1110: ADC miniDSP IADC = 32766
111 1111 1111 1111: ADC miniDSP IADC = 32767
Note: IADC should be a integral multiple of DECIM ( Page-0, Reg-23, D3-D0 )
Note: Page-0, Reg-21 takes effect after programming Page-0, Reg-22 in the immediate next
control command
6.2.22 Page 0 / Register 22:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
ADC miniDSP instruction control Register 2
DESCRIPTION
ADC miniDSP IADC (14:8) setting. Use when ADC miniDSP is in use for signal processing (page
0,Reg 61)
ADC miniDSP IADC(14:0)
000 0000 0000 0000: ADC miniDSP IADC=32768
000 0000 0000 0001: ADC miniDSP IADC = 1
000 0000 0000 0010: ADC miniDSP IADC = 2
…
…
111 1111 1111 1110: ADC miniDSP IADC = 32766
111 1111 1111 1111: ADC miniDSP IADC = 32767
Note: IADC should be a integral multiple of DECIM ( Page-0, Reg-23, D3-D0 )
Note: Page-0, Reg-21 takes effect after programming Page-0, Reg-22 in the immediate next
control command
6.2.23 Page 0 / Register 23:
ADC miniDSP Decimation Factor Setting Register
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
Reserved. Write only default values
D3–D0
R/W
0100
ADC miniDSP Decimation factor setting. Use when ADC miniDSP is in use for signal processing
(page 0,Reg 61)
0000: Decimation factor in ADC miniDSP = 16
0001: Decimation factor in ADC miniDSP = 1
0010: Decimation factor in ADC miniDSP = 2
…
1110: Decimation factor in ADC miniDSP = 14
1111: Decimation factor in ADC miniDSP = 15
BIT
DESCRIPTION
6.2.24 Page 0 / Register 24:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Reserved. Write only default values
6.2.25 Page 0 / Register 25:
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R
0000 0
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Reserved Register
Clock Setting Register 9, Multiplexers
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
109
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
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(continued)
BIT
READ/
WRITE
RESET
VALUE
D2–D0
R/W
000
DESCRIPTION
CDIV_CLKIN Clock Selection
000: CDIV_CLKIN= MCLK
001: CDIV_CLKIN= BCLK
010: CDIV_CLKIN=DIN
011: CDIV_CLKIN=PLL_CLK
100: CDIV_CLKIN=DAC_CLK
101: CDIV_CLKIN=DAC_MOD_CLK
110: CDIV_CLKIN=ADC_CLK
111: CDIV_CLKIN=ADC_MOD_CLK
6.2.26 Page 0 / Register 26:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
Clock Setting Register 10, CLKOUT M divider value
DESCRIPTION
CLKOUT M divider power control
0: CLKOUT M divider powered down
1: CLKOUT M divider powered up
CLKOUT M divider value
000 0000: CLKOUT M divider
000 0001: CLKOUT M divider
000 0010: CLKOUT M divider
…
111 1110: CLKOUT M divider
111 1111: CLKOUT M divider
6.2.27 Page 0 / Register 27:
= 126
= 127
Audio Interface Setting Register 1
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
Audio Interface Selection
00: Audio Interface = I2S
01: Audio Interface = DSP
10: Audio Interface = RJF
11: Audio Interface = LJF
D5–D4
R/W
00
Audio Data Word length
00: Data Word length = 16
01: Data Word length = 20
10: Data Word length = 24
11: Data Word length = 32
DESCRIPTION
bits
bits
bits
bits
D3
R/W
0
BCLK Direction Control
0: BCLK is input to the device
1: BCLK is output from the device
D2
R/W
0
WCLK Direction Control
0: WCLK is input to the device
1: WCLK is output from the device
D1
R
0
Reserved. Write only default value
D0
R/W
0
DOUT High Impendance Output Control
0: DOUT will not be high impedance while Audio Interface is active
1: DOUT will be high impedance after data has been transferred
6.2.28 Page 0 / Register 28:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
110
= 128
=1
=2
REGISTER MAP
Audio Interface Setting Register 2, Data offset setting
DESCRIPTION
Data Offset Value
0000 0000: Data Offset
0000 0001: Data Offset
…
1111 1110: Data Offset
1111 1111: Data Offset
= 0 BCLK's
= 1 BCLK's
= 254 BCLK's
= 255 BCLK's
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.29 Page 0 / Register 29:
Audio Interface Setting Register 3
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
Reserved. Write only default values
D5
R/W
0
Loopback control
0: No Loopback
1: Audio Data in is routed to Audio Data out
D4
R/W
0
Loopback control
0: No Loopback
1: Stereo ADC output is routed to Stereo DAC input
D3
R/W
0
Audio Bit Clock Polarity Control
0: Default Bit Clock polarity
1: Bit Clock is inverted w.r.t. default polarity
D2
R/W
0
Primary BCLK and Primary WCLK Power control
0: Primary BCLK and Primary WCLK buffers are powered up when they are used in clock
generation even when the codec is powered down
1: Priamry BCLK and Primary WCLK buffers are powered down when the codec is powered down
D1–D0
R/W
00
BDIV_CLKIN Multiplexer Control
00: BDIV_CLKIN = DAC_CLK
01: BDIV_CLKIN = DAC_MOD_CLK
10: BDIV_CLKIN = ADC_CLK
11: BDIV_CLKIN = ADC_MOD_CLK
DESCRIPTION
6.2.30 Page 0 / Register 30:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D0
R/W
000 0001
DESCRIPTION
BCLK N Divider Power Control
0: BCLK N divider powered down
1: BCLK N divider powered up
BCLK N Divider value
0000 0000: BCLK N divider
0000 0001: BCLK N divider
…
1111 1110: BCLK N divider
1111 1111: BCLK N divider
6.2.31 Page 0 / Register 31:
BIT
READ/
WRITE
Clock Setting Register 11, BCLK N Divider
= 128
=1
= 126
= 127
Audio Interface Setting Register 4, Secondary Audio Interface
RESET
VALUE
DESCRIPTION
D7
R
0
Reserved. Write only default values
D6–D5
R/W
00
Secondary Bit Clock Multiplexer
00: Secondary Bit Clock = GPIO
01: Secondary Bit Clock = SCLK
10: Secondary Bit Clock = MISO
11: Secondary Bit Clock = DOUT
D4–D3
R/W
00
Secondary Word Clock Multiplexer
00: Secondary Word Clock = GPIO
01: Secondary Word Clock = SCLK
10: Secondary Word Clock = MISO
11: Secondary Word Clock = DOUT
D2–D1
R/W
00
ADC Word Clock Multiplexer
00: ADC Word Clock = GPIO
01: ADC Word Clock = SCLK
10: ADC Word Clock = MISO
11: Do not use
D0
R/W
0
Secondary Data Input Multiplexer
0: Secondary Data Input = GPIO
1: Secondary Data Input = SCLK
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REGISTER MAP
111
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.32 Page 0 / Register 32:
www.ti.com
Audio Interface Setting Register 5
BIT
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
D3
R/W
0
Primary / Secondary Bit Clock Control
0: Primary Bit Clock(BCLK) is used for Audio Interface and Clocking
1: Secondary Bit Clock is used for Audio Interface and Clocking
D2
R/W
0
Primary / Secondary Word Clock Control
0: Primary Word Clock(WCLK) is used for Audio Interface
1: Secondary Word Clock is used for Audio Interface
D1
R/W
0
ADC Word Clock Control
0: ADC Word Clock is same as DAC Word Clock
1: ADC Word Clock is Secondary ADC Word Clock
D0
R/W
0
Audio Data In Control
0: DIN is used for Audio Data In
1: Secondary Data In is used for Audio Data In
DESCRIPTION
Reserved. Write only default values
6.2.33 Page 0 / Register 33:
Audio Interface Setting Register 6
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
BCLK Output Control
0: BCLK Output = Generated Primary Bit Clock
1: BCLK Output = Secondary Bit Clock Input
D6
R/W
0
Secondary Bit Clock Output Control
0: Secondary Bit Clock = BCLK input
1: Secondary Bit Clock = Generated Primary Bit Clock
D5–D4
R/W
00
WCLK Output Control
00: WCLK Output = Generated DAC_FS
01: WCLK Output = Generated ADC_FS
10: WCLK Output = Secondary Word Clock Input
11: Do not use
D3–D2
R/W
00
Secondary Word Clock Output Control
00: Secondary Word Clock output = WCLK input
01: Secondary Word Clock output = Generated DAC_FS
10: Secondary Word Clock output = Generated ADC_FS
11: Do not use
D1
R/W
0
Primary Data Out output control
0: DOUT output = Data Output from Serial Interface
1: DOUT output = Secondary Data Input (Loopback)
D0
R/W
0
Secondary Data Out output control
0: Secondary Data Output = DIN input (Loopback)
1: Secondary Data Output = Data output from Serial Interface
DESCRIPTION
6.2.34 Page 0 / Register 34:
Digital Interface Misc. Setting Register
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value
D6
R
0
Reserved. Write only default value
D5
R/W
0
I2C General Call Address Configuration
0: I2C General Call Address will be ignored
1: I2C General Call Address accepted
D4–D0
R
0 0000
DESCRIPTION
Reserved. Write only default values
6.2.35 Page 0 / Register 35:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
112
REGISTER MAP
Reserved Register
DESCRIPTION
Reserved. Write only default value
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.36 Page 0 / Register 36:
ADC Flag Register
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Left ADC PGA Status Flag
0: Gain Applied in Left ADC PGA is not equal to Programmed Gain in Control Register
1: Gain Applied in Left ADC PGA is equal to Programmed Gain in Control Register
D6
R
0
Left ADC Power Status Flag
0: Left ADC Powered Down
1: Left ADC Powered Up
D5
R
0
Left AGC Gain Status. This sticky flag will self clear on reading
0: Gain in Left AGC is not saturated
1: Gain in Left ADC is equal to maximum allowed gain in Left AGC
D4
R
0
Reserved. Write only default value
D3
R
0
Right ADC PGA Status Flag
0: Gain Applied in Right ADC PGA is not equal to Programmed Gain in Control Register
1: Gain Applied in Right ADC PGA is equal to Programmed Gain in Control Register
D2
R
0
Right ADC Power Status Flag
0: Right ADC Powered Down
1: Right ADC Powered Up
D1
R
0
Right AGC Gain Status. This sticky flag will self clear on reading
0: Gain in Right AGC is not saturated
1: Gain in Right ADC is equal to maximum allowed gain in Right AGC
D0
R
0
Reserved. Write only default value
DESCRIPTION
6.2.37 Page 0 / Register 37:
DAC Flag Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Left DAC Power Status Flag
0: Left DAC Powered Down
1: Left DAC Powered Up
D6
R
0
Left Line Output Driver(LOL) Power Status Flag
0: LOL Powered Down
1: LOL Powered Up
D5
R
0
Left Headphone Driver (HPL) Power Status Flag
0: HPL Powered Down
1: HPL Powered Up
D4
R
0
Reserved. Write only default values
D3
R
0
Right DAC Power Status Flag
0: Right DAC Powered Down
1: Right DAC Powered Up
D2
R
0
Right Line Output Driver(LOR) Power Status Flag
0: LOR Powered Down
1: LOR Powered Up
D1
R
0
Right Headphone Driver (HPR) Power Status Flag
0: HPR Powered Down
1: HPR Powered Up
D0
R
0
Reserved. Write only default values
DESCRIPTION
6.2.38 Page 0 / Register 38:
BIT
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4
R
0
D3–D1
R
000
D0
R
0
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DAC Flag Register 2
DESCRIPTION
Reserved. Write only default values
Left DAC PGA Status Flag
0: Gain applied in Left DAC PGA is not equal to Gain programmed in Control Register
1: Gain applied in Left DAC PGA is equal to Gain programmed in Control Register
Reserved. Write only default values
Right DAC PGA Status Flag
0: Gain applied in Right DAC PGA is not equal to Gain programmed in Control Register
1: Gain applied in Right DAC PGA is equal to Gain programmed in Control Register
REGISTER MAP
113
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.39 Page 0 / Register 39-41:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.40 Page 0 / Register 42:
Sticky Flag Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Left DAC Overflow Status. This sticky flag will self clear on read
0: No overflow in Left DAC
1: Overflow has happened in Left DAC since last read of this register
D6
R
0
Right DAC Overflow Status. This sticky flag will self clear on read
0: No overflow in Right DAC
1: Overflow has happened in Right DAC since last read of this register
D5
R
0
DAC miniDSP Barrel Shifter Output Overflow Sticky Flag. Flag is reset on register reading
D4
R
0
Reserved. Write only default value
D3
R
0
Left ADC Overflow Status. This sticky flag will self clear on read
0: No overflow in Left ADC
1: Overflow has happened in Left ADC since last read of this register
D2
R
0
Right ADC Overflow Status. This sticky flag will self clear on read
0: No overflow in Right ADC
1: Overflow has happened in Right ADC since last read of this register
D1
R
0
ADC miniDSP Barrel Shifter Output Overflow Sticky Flag. Flag is reset on register reading
D0
R
0
Reserved. Write only default value
DESCRIPTION
6.2.41 Page 0 / Register 43:
Interrupt Flag Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Left DAC Overflow Status.
0: No overflow in Left DAC
1: Overflow condition is present in Left ADC at the time of reading the register
D6
R
0
Right DAC Overflow Status.
0: No overflow in Right DAC
1: Overflow condition is present in Right DAC at the time of reading the register
D5
R
0
DAC miniDSP Barrel Shifter Output Overflow Flag. Overflow condition is present at the time of
reading the register
D4
R
0
Reserved. Write only default value
D3
R
0
Left ADC Overflow Status.
0: No overflow in Left ADC
1: Overflow condition is present in Left ADC at the time of reading the register
D2
R
0
Right ADC Overflow Status.
0: No overflow in Right ADC
1: Overflow condition is present in Right ADC at the time of reading the register
D1
R
0
ADC miniDSP Barrel Shifter Output Overflow Flag. Overflow condition is present at the time of
reading the register
D0
R
0
Reserved. Write only default value
DESCRIPTION
6.2.42 Page 0 / Register 44:
114
www.ti.com
Sticky Flag Register 2
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
HPL Over Current Detect Flag
0: Over Current not detected on HPL
1: Over Current detected on HPL (will be cleared when the register is read)
D6
R
0
HPR Over Current Detect Flag
0: Over Current not detected on HPR
1: Over Current detected on HPR (will be cleared when the register is read)
REGISTER MAP
DESCRIPTION
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5
R
0
Headset Button Press
0: Button Press not detected
1: Button Press detected (will be cleared when the register is read)
D4
R
0
Headset Insertion/Removal Detect Flag
0: Insertion/Removal event not detected
1: Insertion/Removal event detected (will be cleared when the register is read)
D3
R
0
Left Channel DRC, Signal Threshold Flag
0: Signal Power is below Signal Threshold
1: Signal Power exceeded Signal Threshold (will be cleared when the register is read)
D2
R
0
Right Channel DRC, Signal Threshold Flag
0: Signal Power is below Signal Threshold
1: Signal Power exceeded Signal Threshold (will be cleared when the register is read)
D1
R
0
DAC miniDSP Standard Interrupt Port Output. This is a sticky bit
D0
R
0
DAC miniDSP Auxilliary Interrupt Port Output. This is a sticky bit
DESCRIPTION
6.2.43 Page 0 / Register 45:
Sticky Flag Register 3
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved.
D6
R
0
Left AGC Noise Threshold Flag
0: Signal Power is greater than Noise Threshold
1: Signal Power was lower than Noise Threshold (will be cleared when the register is read)
D5
R
0
Right AGC Noise Threshold Flag
0: Signal Power is greater than Noise Threshold
1: Signal Power was lower than Noise Threshold (will be cleared when the register is read)
D4
R
0
ADC miniDSP Standard Interrupt Port Output. This is a sticky bit
D3
R
0
ADC miniDSP Auxilliary Interrupt Port Output. This is a sticky bit
D2
R
0
Left ADC DC Measurement Data Available Flag
0: Data not available
1: Data available (will be cleared when the register is read)
D1
R
0
Right ADC DC Measurement Data Available Flag
0: Data not available
1: Data available (will be cleared when the register is read)
D0
R
0
Reserved
DESCRIPTION
6.2.44 Page 0 / Register 46:
Interrupt Flag Register 2
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
HPL Over Current Detect Flag
0: Over Current not detected on HPL
1: Over Current detected on HPL
D6
R
0
HPR Over Current Detect Flag
0: Over Current not detected on HPR
1: Over Current detected on HPR
D5
R
0
Headset Button Press
0: Button Press not detected
1: Button Press detected
D4
R
0
Headset Insertion/Removal Detect Flag
0: Headset removal detected
1: Headset insertion detected
D3
R
0
Left Channel DRC, Signal Threshold Flag
0: Signal Power is below Signal Threshold
1: Signal Power exceeded Signal Threshold
D2
R
0
Right Channel DRC, Signal Threshold Flag
0: Signal Power is below Signal Threshold
1: Signal Power exceeded Signal Threshold
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DESCRIPTION
REGISTER MAP
115
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D1
R
0
DAC miniDSP Standard Interrupt Port Output.
This bit shows the instantaneous value of miniDSP interrupt port at the time of reading the register
D0
R
0
DAC miniDSP Auxilliary Interrupt Port Output.
This bit shows the instantaneous value of miniDSP interrupt port at the time of reading the register
DESCRIPTION
6.2.45 Page 0 / Register 47:
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved.
D6
R
0
Left AGC Noise Threshold Flag
0: Signal Power is greater than Noise Threshold
1: Signal Power was lower than Noise Threshold
D5
R
0
Right AGC Noise Threshold Flag
0: Signal Power is greater than Noise Threshold
1: Signal Power was lower than Noise Threshold
D4
R
0
ADC miniDSP Standard Interrupt Port Output.
This bit shows the instantaneous value of the interrupt port at the time of reading the register
D3
R
0
ADC miniDSP Auxilliary Interrupt Port Output.
This bit shows the instantaneous value of the interrupt port at the time of reading the register
D2
R
0
Left ADC DC Measurement Data Available Flag
0: Data not available
1: Data available
D1
R
0
Right ADC DC Measurement Data Available Flag
0: Data not available
1: Data available
D0
R
0
Reserved
DESCRIPTION
6.2.46 Page 0 / Register 48:
116
Interrupt Flag Register 3
INT1 Interrupt Control Register
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
INT1 Interrupt for Headset Insertion Event
0: Headset Insertion event will not generate a INT1 interrupt
1: Headset Insertion even will generate a INT1 interrupt
D6
R/W
0
INT1 Interrupt for Button Press Event
0: Button Press event will not generate a INT1 interrupt
1: Button Press event will generate a INT1 interrupt
D5
R/W
0
INT1 Interrupt for DAC DRC Signal Threshold
0: DAC DRC Signal Power exceeding Signal Threshold will not generate a INT1 interrupt
1: DAC DRC Signal Power exceeding Signal Threshold for either of Left or Right Channel will
generate a INT1 interrupt. Read Page-0, Register-44 to distinguish between Left or Right Channel
D4
R/W
0
INT1 Interrupt for AGC Noise Interrupt
0: Noise level detected by AGC will not generate a INT1 interrupt
1: Noise level detected by either off Left or Right Channel AGC will generate a INT1 interrupt.
Read Page-0, Register-45 to distinguish between Left or Right Channel
D3
R/W
0
INT1 Interrupt for Over Current Condition
0: Headphone Over Current condition will not generate a INT1 interrupt.
1: Headphone Over Current condition on either off Left or Right Channels will generate a INT1
interrupt. Read Page-0, Register-44 to distinguish between HPL and HPR
D2
R/W
0
INT1 Interrupt for overflow event
0: ADC or DAC miniDSP generated interrupt does not result in a INT1 interrupt
1: ADC or DAC miniDSP generated interrupt will result in a INT1 interrupt. Read Page-0,
Register-42 to distinguish between ADC or DAC.miniDSP interrupt
D1
R/W
0
INT1 Interrupt for DC Measurement
0: DC Measurement data available will not generate INT1 interrupt
1: DC Measurement data available will generate INT1 interrupt
REGISTER MAP
DESCRIPTION
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D0
R/W
0
DESCRIPTION
INT1 pulse control
0: INT1 is active high interrupt of 1 pulse of approx. 2ms duration
1: INT1 is active high interrupt of multiple pulses, each of duration 2ms. To stop the pulse train,
read Page-0, Reg-42d, 44d or 45d
6.2.47 Page 0 / Register 49:
INT2 Interrupt Control Register
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
INT2 Interrupt for Headset Insertion Event
0: Headset Insertion event will not generate a INT2 interrupt
1: Headset Insertion even will generate a INT2 interrupt
D6
R/W
0
INT2 Interrupt for Button Press Event
0: Button Press event will not generate a INT2 interrupt
1: Button Press event will generate a INT2 interrupt
D5
R/W
0
INT2 Interrupt for DAC DRC Signal Threshold
0: DAC DRC Signal Power exceeding Signal Threshold will not generate a INT2 interrupt
1: DAC DRC Signal Power exceeding Signal Threshold for either of Left or Right Channel will
generate a INT2 interrupt. Read Page-0, Register-44 to distinguish between Left or Right Channel
D4
R/W
0
INT2 Interrupt for AGC Noise Interrupt
0: Noise level detected by AGC will not generate a INT2 interrupt
1: Noise level detected by either off Left or Right Channel AGC will generate a INT2 interrupt.
Read Page-0, Register-45 to distinguish between Left or Right Channel
D3
R/W
0
INT2 Interrupt for Over Current Condition
0: Headphone Over Current condition will not generate a INT2 interrupt.
1: Headphone Over Current condition on either off Left or Right Channels will generate a INT2
interrupt. Read Page-0, Register-44 to distinguish between HPL and HPR
D2
R/W
0
INT2 Interrupt for overflow event
0: ADC or DAC miniDSP generated interrupt will not result in a INT2 interrupt
1: ADC or DAC miniDSP generated interrupt will result in a INT2 interrupt. Read Page-0,
Register-42 to distinguish between ADC or DAC.
D1
R/W
0
INT2 Interrupt for DC Measurement
0: DC Measurement data available will not generate INT2 interrupt
1: DC Measurement data available will generate INT2 interrupt
D0
R/W
0
INT2 pulse control
0: INT2 is active high interrupt of 1 pulse of approx. 2ms duration
1: INT2 is active high interrupt of multiple pulses, each of duration 2ms. To stop the pulse train,
read Page-0, Reg-42d, 44d and 45d
DESCRIPTION
6.2.48 Page 0 / Register 50-51:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Reserved. Write only default values
6.2.49 Page 0 / Register 52:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R
00
Submit Documentation Feedback
GPIO/MFP5 Control Register
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
117
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D2
R/W
0000
D1
R
X
GPIO Input Pin state, used along with GPIO as general purpose input
D0
R/W
0
GPIO as general purpose output control
0: GPIO pin is driven to '0' in general purpose output mode
1: GPIO pin is driven to '1' in general purpose output mode
DESCRIPTION
GPIO Control
0000: GPIO input/output disabled.
0001: GPIO input is used for secondary audio interface, digital microphone input or clock input.
Configure other registers to choose the functionality of GPIO input
0010: GPIO is general purpose input
0011: GPIO is general purpose output
0100: GPIO output is CLKOUT
0101: GPIO output is INT1
0110: GPIO output is INT2
0111: GPIO output is ADC_WCLK for Audio Interface
1000: GPIO output is secondary bit-clock for Audio Interface
1001: GPIO output is secondary word-clock for Audio Interface
1010: GPIO output is clock for digital microphone
1011-1111: Reserved. Do not use.
6.2.50 Page 0 / Register 53:
DOUT/MFP2 Function Control Register
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4
R/W
1
D3–D1
R/W
001
DOUT MUX Control
000: DOUT disabled
001: DOUT is Primary DOUT
010: DOUT is General Purpose Output
011: DOUT is CLKOUT
100: DOUT is INT1
101: DOUT is INT2
110: DOUT is Secondary BCLK
111: DOUT is Secondary WCLK
D0
R/W
0
DOUT as General Purpose Output
0: DOUT General Purpose Output is '0'
1: DOUT General Purpose Output is '1'
BIT
DESCRIPTION
Reserved. Write only default values
DOUT Bus Keeper Control
0: DOUT Bus Keeper Enabled
1: DOUT Bus Keeper Disabled
6.2.51 Page 0 / Register 54:
DIN/MFP1 Function Control Register
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R
0 0000
D2–D1
R/W
01
DIN function control
00: DIN pin is disabled
01: DIN is enabled for Primary Data Input or Digital Microphone Input or General Purpose Clock
input
10: DIN is used as General Purpose Input
11: Reserved. Do not use
D0
R
X
Value of DIN input pin. To be used when for General Purpose Input
DESCRIPTION
Reserved. Write only reserved values
6.2.52 Page 0 / Register 55:
BIT
READ/
WRITE
RESET
VALUE
D7–D5
R
000
118
REGISTER MAP
MISO/MFP4 Function Control Register
DESCRIPTION
Reserved. Write only default values
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D4–D1
R/W
0001
D0
R/W
0
DESCRIPTION
MISO function control
0000: MISO buffer disabled
0001: MISO is used for data output in SPI interface, is disabled for I2C interface
0010: MISO is General Purpose Output
0011: MISO is CLKOUT output
0100: MISO is INT1 output
0101: MISO is INT2 output
0110: MISO is ADC Word Clock output
0111: MISO is clock output for Digital Microphone
1000: MISO is Secondary Data Output for Audio Interface
1001: MISO is Secondary Bit Clock for Audio Interface
1010: MISO is Secondary Word Clock for Audio Interface
1011-1111: Reserved. Do not use
Value to be driven on MISO pin when used as General Purpose Output
6.2.53 Page 0 / Register 56:
SCLK/MFP3 Function Control Register
READ/
WRITE
RESET
VALUE
D7–D3
R
0 0000
D2–D1
R/W
01
SCLK function control
00: SCLK pin is disabled
01: SCLK pin is enabled for SPI clock in SPI Interface mode or when in I2C Interface enabled for
Secondary Data Input or Secondary Bit Clock Input or Secondary Word Clock or Secondary ADC
Word Clock or Digital Microphone Input
10: SCLK is enabled as General Purpose Input
11: Reserved. Do not use
D0
R
X
Value of SCLK input pin when used as General Purpose Input
BIT
DESCRIPTION
Reserved. Write only default values
6.2.54 Page 0 / Register 57-59:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Registers
DESCRIPTION
Reserved. Write only default values
6.2.55 Page 0 / Register 60:
DAC Signal Processing Block Control Register
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
0: ADC and DAC miniDSP's are independently powered up
1: ADC and DAC miniDSP's are powered up together. Useful when there is data transfer between
ADC and DAC miniDSP's
D6
R/W
0
DAC miniDSP Power Configuration
0: DAC miniDSP is powered down with DAC Channel Power Down
1: DAC miniDSP is powered up if ADC Channel is powered up
D5
R
0
Reserved. Write only default value
D4–D0
R/W
0 0001
DESCRIPTION
0 0000: The DAC miniDSP will be used for signal processing
0 0001: DAC Signal Processing Block PRB_P1
0 0010: DAC Signal Processing Block PRB_P2
0 0011: DAC Signal Processing Block PRB_P3
0 0100: DAC Signal Processing Block PRB_P4
…
1 1000: DAC Signal Processing Block PRB_P24
1 1001: DAC Signal Processing Block PRB_P25
1 1010-1 1111: Reserved. Do not use
6.2.56 Page 0 / Register 61:
BIT
READ/
WRITE
RESET
VALUE
D7–D5
R
000
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ADC Signal Processing Block Control Register
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
119
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D4–D0
R/W
0 0001
DESCRIPTION
0 0000: The ADC miniDSP will be used for signal processing
0 0001: ADC Singal Processing Block PRB_R1
0 0010: ADC Signal Processing Block PRB_R2
0 0011: ADC Signal Processing Block PRB_R3
0 0100: ADC Signal Processing Block PRB_R4
…
1 0001: ADC Signal Processing Block PRB_R17
1 0010: ADC Signal Processing Block PRB_R18
1 0010-1 1111: Reserved. Do not use
6.2.57 Page 0 / Register 62:
ADC and DAC miniDSP Configuration Register
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default values
D6
R/W
0
ADC miniDSP Auxilliary Control Bit-A. Used for conditional instruction like JMP.
D5
R/W
0
ADC miniDSP Auxilliary Control Bit-B. Used for conditional instruction like JMP.
D4
R/W
0
0: Reset ADC miniDSP instruction counter at the start of new frame.
1: Do not reset ADC miniDSP instruction counter at the start of new frame. If ADC miniDSP is used
for Signal Processing
D3
R
0
Reserved. Write only default values
D2
R/W
0
DAC miniDSP Auxilliary Control Bit-A. Used for conditional instruction like JMP.
D1
R/W
0
DAC miniDSP Auxilliary Control Bit-B. Used for conditional instruction like JMP.
D0
R/W
0
0: Reset DAC miniDSP instruction counter at the start of new frame.
1: Do not reset DAC miniDSP instruction counter at the start of new frame. If DAC miniDSP is used
for Signal Processing
BIT
DESCRIPTION
6.2.58 Page 0 / Register 63:
DAC Channel Setup Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
Left DAC Channel Power Control
0: Left DAC Channel Powered Down
1: Left DAC Channel Powered Up
D6
R/W
0
Right DAC Channel Power Control
0: Right DAC Channel Powered Down
1: Right DAC Channel Powered Up
D5–D4
R/W
01
Left DAC Data path Control
00: Left DAC data is disabled
01: Left DAC data Left Channel Audio Interface Data
10: Left DAC data is Right Channel Audio Interface Data
11: Left DAC data is Mono Mix of Left and Right Channel Audio Interface Data
D3–D2
R/W
01
Right DAC Data path Control
00: Right DAC data is disabled
01: Right DAC data Right Channel Audio Interface Data
10: Right DAC data is Left Channel Audio Interface Data
11: Right DAC data is Mono Mix of Left and Right Channel Audio Interface Data
D1–D0
R/W
00
DAC Channel Volume Control's Soft-Step control
00: Soft-Stepping is 1 step per 1 DAC Word Clock
01: Soft-Stepping is 1 step per 2 DAC Word Clocks
10: Soft-Stepping is disabled
11: Reserved. Do not use
120
REGISTER MAP
DESCRIPTION
Submit Documentation Feedback
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.59 Page 0 / Register 64:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D4
R/W
000
DAC Channel Setup Register 2
DESCRIPTION
Right Modulator Output Control
0: When Right DAC Channel is powered down, the data is zero.
1: When Right DAC Channel is powered down, the data is inverted version of Left DAC Modulator
Output. Can be used when differential mono output is used
DAC Auto Mute Control
000: Auto Mute disabled
001: DAC is auto muted if
010: DAC is auto muted if
011: DAC is auto muted if
100: DAC is auto muted if
101: DAC is auto muted if
110: DAC is auto muted if
111: DAC is auto muted if
input data
input data
input data
input data
input data
input data
input data
is
is
is
is
is
is
is
DC for
DC for
DC for
DC for
DC for
DC for
DC for
more
more
more
more
more
more
more
than
than
than
than
than
than
than
100 consecutive inputs
200 consecutive inputs
400 consecutive inputs
800 consecutive inputs
1600 consecutive inputs
3200 consecutive inputs
6400 consecutive inputs
D3
R/W
1
Left DAC Channel Mute Control
0: Left DAC Channel not muted
1: Left DAC Channel muted
D2
R/W
1
Right DAC Channel Mute Control
0: Right DAC Channel not muted
1: Right DAC Channel muted
D1–D0
R/W
00
DAC Master Volume Control
00: Left and Right Channel have independent volume control
01: Left Channel Volume is controlled by Right Channel Volume Control setting
10: Right Channel Volume is controlled by Left Channel Volume Control setting
11: Reserved. Do not use
6.2.60 Page 0 / Register 65:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
DESCRIPTION
Left DAC Channel Digital Volume Control Setting
0111 1111-0011 0001: Reserved. Do not use
0011 0000: Digital Volume Control = +24dB
0010 1111: Digital Volume Control = +23.5dB
…
0000 0001: Digital Volume Control = +0.5dB
0000 0000: Digital Volume Control = 0.0dB
1111 1111: Digital Volume Control = -0.5dB
...
1000 0010: Digital Volume Control = -63dB
1000 0001: Digital Volume Control = -63.5dB
1000 0000: Reserved. Do not use
6.2.61 Page 0 / Register 66:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
Submit Documentation Feedback
Left DAC Channel Digital Volume Control Register
Right DAC Channel Digital Volume Control Register
DESCRIPTION
Right DAC Channel Digital Volume Control Setting
0111 1111-0011 0001: Reserved. Do not use
0011 0000: Digital Volume Control = +24dB
0010 1111: Digital Volume Control = +23.5dB
…
0000 0001: Digital Volume Control = +0.5dB
0000 0000: Digital Volume Control = 0.0dB
1111 1111: Digital Volume Control = -0.5dB
...
1000 0010: Digital Volume Control = -63dB
1000 0001: Digital Volume Control = -63.5dB
1000 0000: Reserved. Do not use
REGISTER MAP
121
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.62 Page 0 / Register 67:
www.ti.com
Headset Detection Configuration Register
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
0: Headset Detection Disabled
1: Headset Detection Enabled
D6–D5
R
00
Headset Type Flag
00: Headset not detected
01: Stereo Headset detected
10: Reserved
11: Stereo + Cellular Headset detected
D4–D2
R/W
000
Headset Detection Debounce Programmability
000: Debounce Time = 16ms
001: Debounce Time = 32ms
010: Debounce Time = 64ms
011: Debounce Time = 128ms
100: Debounce Time = 256ms
101: Debounce Time = 512ms
110-111: Reserved. Do not use
Note: All times are typical values
D1–D0
R/W
00
Headset Button Press Debounce Programmability
00: Debounce disabled
01: Debounce Time = 8ms
10: Debounce Time = 16ms
11: Debounce Time = 32ms
Note: All times are typical values
DESCRIPTION
6.2.63 Page 0 / Register 68:
DRC Control Register 1
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value
D6
R/W
0
DRC Enable Control
0: Left Channel DRC disabled
1: Left Channel DRC enabled
D5
R/W
0
DRC Enable Control
0: Right Channel DRC disabled
1: Right Channel DRC enabled
D4–D2
R/W
011
DRC Threshold control
000: DRC Threshold = -3dBFS
001: DRC Threshold = -6dBFS
010: DRC Threshold = -9dBFS
011: DRC Threshold = -12dBFS
100: DRC Threshold = -15dBFS
101: DRC Threshold = -18dBFS
110: DRC Threshold = -21dBFS
111: DRC Threshold = -24dBFS
D1–D0
R/W
11
DRC Hysteresis Control
00: DRC Hysteresis = 0dB
01: DRC Hysteresis = 1dB
10: DRC Hysteresis = 2dB
11: DRC Hysteresis = 3dB
BIT
DESCRIPTION
6.2.64 Page 0 / Register 69:
122
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
REGISTER MAP
DRC Control Register 2
DESCRIPTION
Reserved. Write only default value.
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D3
R/W
0111
DRC Hold Programmability
0000: DRC Hold Disabled
0001: DRC Hold Time = 32 DAC Word Clocks
0010: DRC Hold Time = 64 DAC Word Clocks
0011: DRC Hold Time = 128 DAC Word Clocks
0100: DRC Hold Time = 256 DAC Word Clocks
0101: DRC Hold Time = 512 DAC Word Clocks
...
1110: DRC Hold Time = 4*32768 DAC Word Clocks
1111: DRC Hold Time = 5*32768 DAC Word Clocks
D2–D0
R/W
000
Reserved. Write only default values
DESCRIPTION
6.2.65 Page 0 / Register 70:
DRC Control Register 3
BIT
READ/
WRITE
RESET
VALUE
D7–D4
R/W
0000
DRC Attack Rate control
0000: DRC Attack Rate = 4.0dB per DAC Word Clock
0001: DRC Attack Rate = 2.0dB per DAC Word Clock
0010: DRC Attack Rae = 1.0dB per DAC Word Clock
…
1110: DRC Attack Rate = 2.4414e-4dB per DAC Word Clock
1111: DRC Attack Rate = 1.2207e-4dB per DAC Word Clock
D3–D0
R/W
0000
DRC Decay Rate control
0000: DRC Decay Rate = 1.5625e-2dB per DAC Word Clock
0001: DRC Decay Rate = 7.8125e-3dB per DAC Word Clock
0010: DRC Decay Rae = 3.9062e-3dB per DAC Word Clock
…
1110: DRC Decay Rate = 9.5367e-7dB per DAC Word Clock
1111: DRC Decay Rate = 4.7683e-7dB per DAC Word Clock
DESCRIPTION
6.2.66 Page 0 / Register 71:
Beep Generator Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
0: Beep Generator Disabled
1: Beep Generator Enabled. This bit will self clear after the beep has been generated.
D6
R
0
Reserved. Write only default value
D5–D0
R/W
00 0000
DESCRIPTION
Left Channel Beep Volume Control
00 0000: Left Channel Beep Volume
00 0001: Left Channel Beep Volume
…
11 1110: Left Channel Beep Volume
11 1111: Left Channel Beep Volume
6.2.67 Page 0 / Register 72:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
D5–D0
R
00 0000
Submit Documentation Feedback
= 0dB
= -1dB
= -62dB
= -63dB
Beep Generator Register 2
DESCRIPTION
Beep Generator Master Volume Control Setting
00: Left and Right Channels have independent Volume Settings
01: Left Channel Beep Volume is the same as programmed for Right Channel
10: Right Channel Beep Volume is the same as programmed for Left Channel
11: Reserved. Do not use
Right Channel Beep Volume Control
00 0000: Right Channel Beep Volume =
00 0001: Right Channel Beep Volume =
…
11 1110: Right Channel Beep Volume =
11 1111: Right Channel Beep Volume =
0dB
-1dB
-62dB
-63dB
REGISTER MAP
123
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.68 Page 0 / Register 73:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
Programmed value is Beep Sample Length(23:16)
BIT
RESET
VALUE
D7–D0
R/W
1110 1110
Programmed value is Beep Sample Length(15:8)
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0001 0000
Programmed value is Beep Sample Length(7:0)
READ/
WRITE
RESET
VALUE
D7–D0
R/W
1101 1000
Programmed Value is Beep Sin(x)(15:8), where
Sin(x) = sin(2*pi*Fin/Fs), where Fin is desired beep frequency and Fs is
DAC sample rate
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0111 1110
Programmed Value is Beep Sin(x)(7:0), where
Sin(x) = sin(2*pi*Fin/Fs), where Fin is desired beep frequency and Fs is
DAC sample rate
READ/
WRITE
RESET
VALUE
D7–D0
R/W
1110 0011
Programmed Value is Beep Cos(x)(15:8), where
Cos(x) = cos(2*pi*Fin/Fs), where Fin is desired beep frequency and Fs is
DAC sample rate
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Programmed Value is Beep Cos(x)(7:0), where
Cos(x) = cos(2*p*Fin/Fs), where Fin is desired beep frequency and Fs is
DAC sample rate
124
READ/
WRITE
RESET
VALUE
D7
R/W
0
REGISTER MAP
Reserved
DESCRIPTION
Reserved. Write only default values
6.2.76 Page 0 / Register 81:
BIT
Beep Generator Register 9
DESCRIPTION
6.2.75 Page 0 / Register 80:
BIT
Beep Generator Register 8
DESCRIPTION
6.2.74 Page 0 / Register 79:
BIT
Beep Generator Register 7
DESCRIPTION
6.2.73 Page 0 / Register 78:
BIT
Beep Generator Register 6
DESCRIPTION
6.2.72 Page 0 / Register 77:
BIT
Beep Generator Register 5
DESCRIPTION
6.2.71 Page 0 / Register 76:
BIT
Beep Generator Register 4
DESCRIPTION
6.2.70 Page 0 / Register 75:
READ/
WRITE
Beep Generator Register 3
DESCRIPTION
6.2.69 Page 0 / Register 74:
BIT
www.ti.com
ADC Channel Setup Register
DESCRIPTION
Left Channel ADC Power Control
0: Left Channel ADC is powered down
1: Left Channel ADC is powered up
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6
R/W
0
Right Channel ADC Power Control
0: Right Channel ADC is powered down
1: Right Channel ADC is powered up
D5–D4
R/W
00
Digital Microphone Input Configuration
00: GPIO serves as Digital Microphone Input
01: SCLK serves as Digital Microphone Input
10: DIN serves as Digital Microphone Input
11: Reserved. Do not use
D3
R/W
0
Left Channel Digital Microphone Power Control
0: Left Channel ADC not configured for Digital Microphone
1: Left Channel ADC configured for Digital Microphone
D2
R/W
0
Right Channel Digital Microphone Power Control
0: Right Channel ADC not configured for Digital Microphone
1: Right Channel ADC configured for Digital Microphone
D1–D0
R/W
00
ADC Volume Control Soft-Stepping Control
00: ADC Volume Control changes by 1 gain step per ADC Word Clock
01: ADC Volume Control changes by 1 gain step per two ADC Word Clocks
10: ADC Volume Control Soft-Stepping disabled
11: Reserved. Do not use
DESCRIPTION
6.2.77 Page 0 / Register 82:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
1
D6–D4
R/W
000
D3
R/W
1
D2–D0
R/W
000
DESCRIPTION
Left ADC Channel Mute Control
0: Left ADC Channel Un-muted
1: Left ADC Channel Muted
Left ADC Channel Fine Gain Adjust
000: Left ADC Channel Fine Gain = 0dB
001: Left ADC Channel Fine Gain = -0.1dB
010: Left ADC Channel Fine Gain = -0.2dB
011: Left ADC Channel Fine Gain = -0.3dB
100: Left ADC Channel Fine Gain = -0.4dB
101-111: Reserved. Do not use
Right ADC Channel Mute Control
0: Right ADC Channel Un-muted
1: Right ADC Channel Muted
Right ADC Channel Fine Gain Adjust
000: Right ADC Channel Fine Gain = 0dB
001: Right ADC Channel Fine Gain = -0.1dB
010: Right ADC Channel Fine Gain = -0.2dB
011: Right ADC Channel Fine Gain = -0.3dB
100: Right ADC Channel Fine Gain = -0.4dB
101-111: Reserved. Do not use
6.2.78 Page 0 / Register 83:
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Submit Documentation Feedback
ADC Fine Gain Adjust Register
Left ADC Channel Volume Control Register
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
125
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D0
R/W
000 0000
DESCRIPTION
Left ADC Channel Volume Control
100 0000-110 1000: Reserved. Do not use
110 0111: Left ADC Channel Volume = -12dB
110 0110: Left ADC Channel Volume = -11.5dB
110 0101: Left ADC Channel Volume = -11.0dB
…
111 1111: Left ADC Channel Volume = -0.5dB
000 0000: Left ADC Channel Volume = 0.0dB
000 0001: Left ADC Channel Volume = 0.5dB
...
010 0110: Left ADC Channel Volume = 19.0dB
010 0111: Left ADC Channel Volume = 19.5dB
010 1000: Left ADC Channel Volume = 20.0dB
010 1001-011 1111: Reserved. Do not use
6.2.79 Page 0 / Register 84:
READ/
WRITE
BIT
Right ADC Channel Volume Control Register
RESET
VALUE
D7
R
0
D6–D0
R/W
000 0000
DESCRIPTION
Reserved. Write only default values
Right ADC Channel Volume Control
100 0000-110 1000: Reserved. Do not use
110 0111: Right ADC Channel Volume = -12dB
110 0110: Right ADC Channel Volume = -11.5dB
110 0101: Right ADC Channel Volume = -11.0dB
…
111 1111: Right ADC Channel Volume = -0.5dB
000 0000: Right ADC Channel Volume = 0.0dB
000 0001: Right ADC Channel Volume = 0.5dB
...
010 0110: Right ADC Channel Volume = 19.0dB
010 0111: Right ADC Channel Volume = 19.5dB
010 1000: Right ADC Channel Volume = 20.0dB
010 1001-011 1111: Reserved. Do not use
6.2.80 Page 0 / Register 85:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
ADC Phase Adjust Register
DESCRIPTION
ADC Phase Compensation Control
1000 0000-1111 1111: Left ADC Channel Data is delayed with respect to Right ADC Channel
Data. For details of delayed amount please refer to the description of Phase Compensation in the
Overview section.
0000 0000: Left and Right ADC Channel data are not delayed with respect to each other
0000 0001-0111 1111: Right ADC Channel Data is delayed with respect to Left ADC Channel
Data. For details of delayed amount please refer to the description of Phase Compensation in the
Overview section.
6.2.81 Page 0 / Register 86:
Left Channel AGC Control Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D4
R/W
000
Left Channel AGC Target Level Setting
000: Left Channel AGC Target Level = -5.5dBFS
001: Left Channel AGC Target Level = -8.0dBFS
010: Left Channel AGC Target Level = -10.0dBFS
011: Left Channel AGC Target Level = -12.0dBFS
100: Left Channel AGC Target Level = -14.0dBFS
101: Left Channel AGC Target Level = -17.0dBFS
110: Left Channel AGC Target Level = -20.0dBFS
111: Left Channel AGC Target Level = -24.0dBFS
D3–D2
R
00
Reserved. Write only default values
126
REGISTER MAP
DESCRIPTION
0: Left Channel AGC Disabled
1: Left Channel AGC Enabled
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D1–D0
R/W
00
DESCRIPTION
Left Channel AGC Gain Hysteresis Control
00: Left Channel AGC Gain Hysteresis is disabled
01: Left Channel AGC Gain Hysteresis is 0.5dB
10: Left Channel AGC Gain Hysteresis is 1.0dB
11: Left Channel AGC Gain Hysteresis is 1.5dB
6.2.82 Page 0 / Register 87:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
D5–D1
R/W
0 0000
D0
R
0
DESCRIPTION
Left Channel AGC Hysteresis Setting
00: Left Channel AGC Hysteresis is 1.0dB
01: Left Channel AGC Hysteresis is 2.0dB
10: Left Channel AGC Hysteresis is 4.0dB
11: Left Channel AGC Hysteresis is disabled
Left Channel AGC Noise Threshold
0 0000: Left Channel AGC Noise Gate disabled
0 0001: Left Channel AGC Noise Threshold is -30dB
0 0010: Left Channel AGC Noise Threshold is -32dB
0 0011: Left Channel AGC Noise Threshold is -34dB
…
1 1101: Left Channel AGC Noise Threshold is -86dB
1 1110: Left Channel AGC Noise Threshold is -88dB
1 1111: Left Channel AGC Noise Threshold is -90dB
Reserved. Write only default value
6.2.83 Page 0 / Register 88:
BIT
READ/
WRITE
D7
R
0
R/W
111 1111
DESCRIPTION
Reserved. Write only default value
Left Channel AGC Maximum Gain Setting
000 0000: Left Channel AGC Maximum Gain = 0.0dB
000 0001: Left Channel AGC Maximum Gain = 0.5dB
000 0010: Left Channel AGC Maximum Gain = 1.0dB
…
111 0011: Left Channel AGC Maximum Gain = 57.5dB
111 0100-111 1111: Left Channel AGC Maximum Gain = 58.0dB
6.2.84 Page 0 / Register 89:
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R/W
0 0000
R/W
Left Channel AGC Control Register 3
RESET
VALUE
D6–D0
D2–D0
Left Channel AGC Control Register 2
000
Submit Documentation Feedback
Left Channel AGC Control Register 4
DESCRIPTION
Left Channel AGC Attack Time Setting
0 0000: Left Channel AGC Attack Time
0 0001: Left Channel AGC Attack Time
0 0010: Left Channel AGC Attack Time
…
1 1101: Left Channel AGC Attack Time
1 1110: Left Channel AGC Attack Time
1 1111: Left Channel AGC Attack Time
= 1*32 ADC Word Clocks
= 3*32 ADC Word Clocks
= 5*32 ADC Word Clocks
= 59*32 ADC Word Clocks
= 61*32 ADC Word Clocks
= 63*32 ADC Word Clocks
Left Channel AGC Attack Time Scale Factor Setting
000: Scale Factor = 1
001: Scale Factor = 2
010: Scale Factor = 4
…
101: Scale Factor = 32
110: Scale Factor = 64
111: Scale Factor = 128
REGISTER MAP
127
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.85 Page 0 / Register 90:
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R/W
0 0000
D2–D0
R/W
000
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4–D0
R/W
0 0000
Left Channel AGC Control Register 5
DESCRIPTION
Left Channel AGC Decay Time Setting
0 0000: Left Channel AGC Decay Time
0 0001: Left Channel AGC Decay Time
0 0010: Left Channel AGC Decay Time
…
1 1101: Left Channel AGC Decay Time
1 1110: Left Channel AGC Decay Time
1 1111: Left Channel AGC Decay Time
= 1*512 ADC Word Clocks
= 3*512 ADC Word Clocks
= 5*512 ADC Word Clocks
= 59*512 ADC Word Clocks
= 61*512 ADC Word Clocks
= 63*512 ADC Word Clocks
Left Channel AGC Decay Time Scale Factor Setting
000: Scale Factor = 1
001: Scale Factor = 2
010: Scale Factor = 4
…
101: Scale Factor = 32
110: Scale Factor = 64
111: Scale Factor = 128
6.2.86 Page 0 / Register 91:
BIT
www.ti.com
Left Channel AGC Control Register 6
DESCRIPTION
Reserved. Write only default values
Left Channel AGC Noise Debounce Time Setting
0 0001: Left Channel AGC Noise Debounce Time
0 0010: Left Channel AGC Noise Debounce Time
0 0011: Left Channel AGC Noise Debounce Time
…
0 1010: Left Channel AGC Noise Debounce Time
0 1011: Left Channel AGC Noise Debounce Time
0 1100: Left Channel AGC Noise Debounce Time
0 1101: Left Channel AGC Noise Debounce Time
...
1 1101: Left Channel AGC Noise Debounce Time
1 1110: Left Channel AGC Noise Debounce Time
1 1111: Left Channel AGC Noise Debounce Time
6.2.87 Page 0 / Register 92:
RESET
VALUE
D7–D4
R
0000
Reserved. Write only default values
D3–D0
R/W
0000
Left Channel AGC Signal Debounce Time Setting
0001: Left Channel AGC Signal Debounce Time =
0010: Left Channel AGC Signal Debounce Time =
0011: Left Channel AGC Signal Debounce Time =
…
1001: Left Channel AGC Signal Debounce Time =
1010: Left Channel AGC Signal Debounce Time =
1011: Left Channel AGC Signal Debounce Time =
1100: Left Channel AGC Signal Debounce Time =
1101: Left Channel AGC Signal Debounce Time =
1110: Left Channel AGC Signal Debounce Time =
1111: Left Channel AGC Signal Debounce Time =
128
REGISTER MAP
=
=
=
=
2048 ADC Word Clocks
4096 ADC Word Clocks
2*4096 ADC Word Clocks
3*4096 ADC Word Clocks
= 19*4096 ADC Word Clocks
= 20*4096 ADC Word Clocks
= 21*4096 ADC Word Clocks
Left Channel AGC Control Register 7
READ/
WRITE
BIT
=0
= 4 ADC Word Clocks
= 8 ADC Word Clocks
DESCRIPTION
0
4 ADC Word Clocks
8 ADC Word Clocks
1024 ADC Word Clocks
2048 ADC Word Clocks
2*2048 ADC Word Clocks
3*2048 ADC Word Clocks
4*2048 ADC Word Clocks
5*2048 ADC Word Clocks
6*2048 ADC Word Clocks
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.88 Page 0 / Register 93:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Left Channel AGC Control Register 8
DESCRIPTION
Left Channel AGC Gain Flag
1111 0100: Left Channel AGC Gain
1111 0101: Left Channel AGC Gain
1111 0110: Left Channel AGC Gain
…
0000 0000: Left Channel AGC Gain
…
0111 0010: Left Channel AGC Gain
0111 0011: Left Channel AGC Gain
0111 0100: Left Channel AGC Gain
6.2.89 Page 0 / Register 94:
= -12.0dB
= -11.5dB
= -11.0dB
= 0.0dB
= 57.0dB
= 57.5dB
= 58.0dB
Right Channel AGC Control Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
D6–D4
R/W
000
Right Channel AGC Target Level Setting
000: Right Channel AGC Target Level = -5.5dBFS
001: Right Channel AGC Target Level = -8.0dBFS
010: Right Channel AGC Target Level = -10.0dBFS
011: Right Channel AGC Target Level = -12.0dBFS
100: Right Channel AGC Target Level = -14.0dBFS
101: Right Channel AGC Target Level = -17.0dBFS
110: Right Channel AGC Target Level = -20.0dBFS
111: Right Channel AGC Target Level = -24.0dBFS
D3–D2
R
00
Reserved. Write only default values
D1–D0
R/W
00
Right Channel AGC Gain Hysteresis Control
00: Right Channel AGC Gain Hysteresis is disabled
01: Right Channel AGC Gain Hysteresis is 0.5dB
10: Right Channel AGC Gain Hysteresis is 1.0dB
11: Right Channel AGC Gain Hysteresis is 1.5dB
DESCRIPTION
0: Right Channel AGC Disabled
1: Right Channel AGC Enabled
6.2.90 Page 0 / Register 95:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
D5–D1
R/W
0 0000
D0
R
0
DESCRIPTION
Right Channel AGC Hysteresis Setting
00: Right Channel AGC Hysteresis is 1.0dB
01: Right Channel AGC Hysteresis is 2.0dB
10: Right Channel AGC Hysteresis is 4.0dB
11: Right Channel AGC Hysteresis is disabled
Right Channel AGC Noise Threshold
0 0000: Right Channel AGC Noise Gate disabled
0 0001: Right Channel AGC Noise Threshold is -30dB
0 0010: Right Channel AGC Noise Threshold is -32dB
0 0011: Right Channel AGC Noise Threshold is -34dB
…
1 1101: Right Channel AGC Noise Threshold is -86dB
1 1110: Right Channel AGC Noise Threshold is -88dB
1 1111: Right Channel AGC Noise Threshold is -90dB
Reserved. Write only default value
6.2.91 Page 0 / Register 96:
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
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Right Channel AGC Control Register 2
Right Channel AGC Control Register 3
DESCRIPTION
Reserved. Write only default value
REGISTER MAP
129
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D0
R/W
111 1111
DESCRIPTION
Right Channel AGC Maximum Gain Setting
000 0000: Right Channel AGC Maximum Gain = 0.0dB
000 0001: Right Channel AGC Maximum Gain = 0.5dB
000 0010: Right Channel AGC Maximum Gain = 1.0dB
…
111 0011: Right Channel AGC Maximum Gain = 57.5dB
111 0100-111 1111: Right Channel AGC Maximum Gain = 58.0dB
6.2.92 Page 0 / Register 97:
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R/W
0 0000
D2–D0
R/W
000
DESCRIPTION
Right Channel AGC Attack Time Setting
0 0000: Right Channel AGC Attack Time
0 0001: Right Channel AGC Attack Time
0 0010: Right Channel AGC Attack Time
…
1 1101: Right Channel AGC Attack Time
1 1110: Right Channel AGC Attack Time
1 1111: Right Channel AGC Attack Time
READ/
WRITE
RESET
VALUE
D7–D3
R/W
0 0000
D2–D0
R/W
000
READ/
WRITE
RESET
VALUE
D7–D5
R
000
130
REGISTER MAP
= 59*32 ADC Word Clocks
= 61*32 ADC Word Clocks
= 63*32 ADC Word Clocks
Right Channel AGC Control Register 5
DESCRIPTION
Right Channel AGC Decay Time Setting
0 0000: Right Channel AGC Decay Time
0 0001: Right Channel AGC Decay Time
0 0010: Right Channel AGC Decay Time
…
1 1101: Right Channel AGC Decay Time
1 1110: Right Channel AGC Decay Time
1 1111: Right Channel AGC Decay Time
= 1*512 ADC Word Clocks
= 3*512 ADC Word Clocks
= 5*512 ADC Word Clocks
= 59*512 ADC Word Clocks
= 61*512 ADC Word Clocks
= 63*512 ADC Word Clocks
Right Channel AGC Decay Time Scale Factor Setting
000: Scale Factor = 1
001: Scale Factor = 2
010: Scale Factor = 4
…
101: Scale Factor = 32
110: Scale Factor = 64
111: Scale Factor = 128
6.2.94 Page 0 / Register 99:
BIT
= 1*32 ADC Word Clocks
= 3*32 ADC Word Clocks
= 5*32 ADC Word Clocks
Right Channel AGC Attack Time Scale Factor Setting
000: Scale Factor = 1
001: Scale Factor = 2
010: Scale Factor = 4
…
101: Scale Factor = 32
110: Scale Factor = 64
111: Scale Factor = 128
6.2.93 Page 0 / Register 98:
BIT
Right Channel AGC Control Register 4
Right Channel AGC Control Register 6
DESCRIPTION
Reserved. Write only default values
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D4–D0
R/W
0 0000
DESCRIPTION
Right Channel AGC Noise Debounce Time Setting
0 0001: Right Channel AGC Noise Debounce Time
0 0010: Right Channel AGC Noise Debounce Time
0 0011: Right Channel AGC Noise Debounce Time
…
0 1010: Right Channel AGC Noise Debounce Time
0 1011: Right Channel AGC Noise Debounce Time
0 1100: Right Channel AGC Noise Debounce Time
0 1101: Right Channel AGC Noise Debounce Time
...
1 1101: Right Channel AGC Noise Debounce Time
1 1110: Right Channel AGC Noise Debounce Time
1 1111: Right Channel AGC Noise Debounce Time
6.2.95 Page 0 / Register 100:
RESET
VALUE
D7–D4
R
0000
Reserved. Write only default values
D3–D0
R/W
0000
Right Channel AGC Signal Debounce Time Setting
0001: Right Channel AGC Signal Debounce Time =
0010: Right Channel AGC Signal Debounce Time =
0011: Right Channel AGC Signal Debounce Time =
…
1001: Right Channel AGC Signal Debounce Time =
1010: Right Channel AGC Signal Debounce Time =
1011: Right Channel AGC Signal Debounce Time =
1100: Right Channel AGC Signal Debounce Time =
1101: Right Channel AGC Signal Debounce Time =
1110: Right Channel AGC Signal Debounce Time =
1111: Right Channel AGC Signal Debounce Time =
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
= 19*4096 ADC Word Clocks
= 20*4096 ADC Word Clocks
= 21*4096 ADC Word Clocks
DESCRIPTION
6.2.96 Page 0 / Register 101:
BIT
= 2048 ADC Word Clocks
= 4096 ADC Word Clocks
= 2*4096 ADC Word Clocks
= 3*4096 ADC Word Clocks
Right Channel AGC Control Register 7
READ/
WRITE
BIT
=0
= 4 ADC Word Clocks
= 8 ADC Word Clocks
0
4 ADC Word Clocks
8 ADC Word Clocks
1024 ADC Word Clocks
2048 ADC Word Clocks
2*2048 ADC Word Clocks
3*2048 ADC Word Clocks
4*2048 ADC Word Clocks
5*2048 ADC Word Clocks
6*2048 ADC Word Clocks
Right Channel AGC Control Register 8
DESCRIPTION
Right Channel AGC Gain Flag
1111 0100: Right Channel AGC
1111 0101: Right Channel AGC
1111 0110: Right Channel AGC
…
0000 0000: Right Channel AGC
…
0111 0010: Right Channel AGC
0111 0011: Right Channel AGC
0111 0100: Right Channel AGC
6.2.97 Page 0 / Register 102:
Gain = -12.0dB
Gain = -11.5dB
Gain = -11.0dB
Gain = 0.0dB
Gain = 57.0dB
Gain = 57.5dB
Gain = 58.0dB
DC Measurement Register 1
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
0: DC Measurement Mode disabled for Left ADC Channel
1: DC Measurement Mode enabled for Left ADC Channel
D6
R/W
0
0: DC Measurement Mode disabled for Right ADC Channel
1: DC Measurement Mode enabled for Right ADC Channel
D5
R/W
0
0: DC Measurement is done using 1st order moving average filter with averaging of 2^D
1: DC Measurement is done with 1sr order Low-pass IIR filter with coefficients as a function of D
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DESCRIPTION
REGISTER MAP
131
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D4–D0
R/W
0 0000
DESCRIPTION
DC Measurement D setting
0 0000: Reserved. Do not use
0 0001: DC Measurement D parameter
0 0010: DC Measurement D parameter
..
1 0011: DC Measurement D parameter
1 0100: DC Measurement D parameter
1 0101-1 1111: Reserved. Do not use
6.2.98 Page 0 / Register 103:
=1
=2
= 19
= 20
DC Measurement Register 2
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default values
D6
R/W
0
0: Left and Right Channel DC measurement result update enabled
1: Left and Right Channel DC measurement result update disabled i.e. new results will be updated
while old results are being read
D5
R/W
0
0: For IIR based DC measurement, measurement value is the instantaneous output of IIR filter
1: For IIR based DC measurement, the measurement value is updated before periodic clearing of
IIR filter
D4–D0
R/W
0 0000
DESCRIPTION
IIR based DC Measurement, averaging time setting
0 0000: Infinite average is used
0 0001: Averaging time is 2^1 ADC Modulator clocks
0 0010: Averaging time is 2^2 ADC Modulator clocks
…
1 0011: Averaging time is 2^19 ADC Modulator clocks
1 0100: Averaging time is 2^20 ADC Modulator clocks
1 0101-1 1111: Reserved. Do not use
6.2.99 Page 0 / Register 104:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Left Channel DC Measurement Output (23:16)
6.2.100 Page 0 / Register 105:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Left Channel DC Measurement Output (15:8)
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Left Channel DC Measurement Output (7:0)
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
132
REGISTER MAP
Right Channel DC Measurement Output Register 1
DESCRIPTION
Right Channel DC Measurement Output (23:16)
6.2.103 Page 0 / Register 108:
BIT
Left Channel DC Measurement Output Register 3
DESCRIPTION
6.2.102 Page 0 / Register 107:
BIT
Left Channel DC Measurement Output Register 2
DESCRIPTION
6.2.101 Page 0 / Register 106:
BIT
Left Channel DC Measurement Output Register 1
Right Channel DC Measurement Output Register 2
DESCRIPTION
Right Channel DC Measurement Output (15:8)
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.104 Page 0 / Register 109:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Right Channel DC Measurement Output Register 3
DESCRIPTION
Right Channel DC Measurement Output (7:0)
6.2.105 Page 0 / Register 110-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Reserved. Write only default values
6.2.106 Page 1 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
D3
R/W
0
D2–D0
R
000
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.107 Page 1 / Register 1:
BIT
Reserved Register
Power Configuration Register
DESCRIPTION
Reserved. Write only default values
0: AVDD will be weakly connected to DVDD.
Use when DVDD is powered, but AVDD LDO is
powered down and AVDD is not externally powered
1: Disabled weak connection of AVDD with DVDD
Reserved. Write only default values
6.2.108 Page 1 / Register 2:
LDO Control Register
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
DVDD LDO Control
00: DVDD LDO output is nominally 1.72V
01: DVDD LDO output is nominally 1.67V
10: DVDD LDO output is nominally 1.77V
11: Do not use
D5–D4
R/W
00
AVDD LDO Control
00: AVDD LDO output is nominally 1.72V
01: AVDD LDO output is nominally 1.67V
10: AVDD LDO output is nominally 1.77V
11: Do not use
D3
R/W
1
Analog Block Power Control
0: Analog Blocks Enabled
1: Analog Blocks Disabled
D2
R
0
DVDD LDO Over Current Detect
0: Over Current not detected for DVDD LDO
1: Over Current detected for DVDD LDO
D1
R
0
AVDD LDO Over Current Detect
0: Over Current not detected for AVDD LDO
1: Over Current detected for AVDD LDO
D0
R/W
0
AVDD LDO Power Control
0: AVDD LDO Powered down
1: AVDD LDO Powered up
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DESCRIPTION
REGISTER MAP
133
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.109 Page 1 / Register 3:
www.ti.com
Playback Configuration Register 1
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
00: Left DAC routing to HPL uses Class-AB driver
01-10: Reserved. Do not use
11: Left DAC routing to HPL uses Class-D driver
Reserved. Write only default value
DESCRIPTION
D5
R
0
D4–D2
R/W
000
Left DAC PTM Control
000: Left DAC in mode PTM_P3, PTM_P4
001: Left DAC in mode PTM_P2
010: Left DAC in mode PTM_P1
011-111: Reserved. Do not use
D1–D0
R
00
Reserved. Write only default value
6.2.110 Page 1 / Register 4:
Playback Configuration Register 2
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
00: Right DAC routing to HPL uses Class-AB driver
01-10: Reserved. Do not use
11: Right DAC routing to HPL uses Class-D driver
Reserved. Write only default value
DESCRIPTION
D5
R
0
D4–D2
R/W
000
Right DAC PTM Control
000: Right DAC in mode PTM_P3, PTM_P4
001: Right DAC in mode PTM_P2
010: Right DAC in mode PTM_P1
011-111: Reserved. Do not use
D1–D0
R
00
Reserved. Write only default value
6.2.111 Page 1 / Register 5-8:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.112 Page 1 / Register 9:
Output Driver Power Control Register
READ/
WRITE
RESET
VALUE
D7–D6
R
00
Reserved. Write only default value
D5
R/W
0
0: HPL is powered down
1: HPL is powered up
D4
R/W
0
0: HPR is powered down
1: HPR is powered up
D3
R/W
0
0: LOL is powered down
1: LOL is powered up
D2
R/W
0
0: LOR is powered down
1: LOR is powered up
D1
R/W
0
0: Left Mixer Amplifier(MAL) is powered down
1: Left Mixer Amplifier(MAL) is powered up
D0
R/W
0
0: Right Mixer Amplifier(MAR) is powered down
1: Right Mixer Amplifier(MAR) is powered up
BIT
DESCRIPTION
6.2.113 Page 1 / Register 10:
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
0
0: Full Chip Common Mode is 0.9V
1: Full Chip Common Mode is 0.75V
BIT
134
Common Mode Control Register
REGISTER MAP
DESCRIPTION
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D4
R/W
00
00:
01:
10:
11:
D3
R/W
0
0: Output Common Mode for LOL & LOR is same as full-chip common mode
1: Output Common Mode for LOL & LOR is 1.65V and output is powered by LDOIN
D2
R
0
Reserved. Write only default value
D1
R/W
0
0: Output of HPL & HPR is powered with AVDD supply
1: Output of HPL & HPR is powered with LDOIN supply
D0
R/W
0
0: When Page-1, Reg-10, D1=1, then LDOIN input range is 1.5V to 1.95V
1: When Page-1, Reg-10, D1=1, then LDOIN input range is 1.8V to 3.6V
DESCRIPTION
Output
Output
Output
Output
6.2.114 Page 1 / Register 11:
BIT
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4
R/W
1
D3–D1
R/W
000
D0
R/W
0
Common
Common
Common
Common
Mode
Mode
Mode
Mode
for
for
for
for
HPL & HPR is
HPL & HPR is
HPL & HPR is
HPL & HPR is
same as full-chip common mode
1.25V
1.5V
1.65V
Over Current Protection Configuration Register
DESCRIPTION
Reserved. Write only default values
0: Over Current detection is disabled for HPL & HPR
1: Over Current detection is enabled for HPL & HPR
000:
001:
010:
011:
100:
101:
110:
111:
No debounce is used for Over Current detection
Over Current detection is debounced by 8ms
Over Current detection is debounce by 16ms
Over Current detection is debounced by 32ms
Over Current detection is debounced by 64ms
Over Current detection is debounced by 128ms
Over Current detection is debounced by 256ms
Over Current detection is debounced by 512ms
0: Output current will be limited if over current condition is detected
1: Output driver will be powered down if over current condition is detected
6.2.115 Page 1 / Register 12:
HPL Routing Selection Register
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
D3
R/W
0
0: Left Channel DAC reconstruction filter's positive terminal is not routed to HPL
1: Left Channel DAC reconstruction filter's positive terminal is routed to HPL
D2
R/W
0
0: IN1L is not routed to HPL
1: IN1L is routed to HPL
D1
R/W
0
0: MAL output is not routed to HPL
1: MAL output is routed to HPL
D0
R/W
0
0: MAR output is not routed to HPL
1: MAR output is routed to HPL
BIT
DESCRIPTION
Reserved. Write only default values
6.2.116 Page 1 / Register 13:
HPR Routing Selection Register
BIT
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4
R/W
0
0: Left Channel DAC reconstruction filter's negative terminal is not routed to HPR
1: Left Channel DAC reconstruction filter's negative terminal is routed to HPR
D3
R/W
0
0: Right Channel DAC reconstruction filter's positive terminal is not routed to HPR
1: Right Channel DAC reconstruction filter's positive terminal is routed to HPR
D2
R/W
0
0: IN1R is not routed to HPR
1: IN1R is routed to HPR
D1
R/W
0
0: MAR output is not routed to HPR
1: MAR output is routed to HPR
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DESCRIPTION
Reserved. Write only default values
REGISTER MAP
135
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D0
R/W
0
DESCRIPTION
0: HPL output is not routed to HPR
1: HPL output is routed to HPR (use when HPL&HPR output is powered by AVDD)
6.2.117 Page 1 / Register 14:
LOL Routing Selection Register
READ/
WRITE
RESET
VALUE
D7–D5
R
000
D4
R/W
0
0: Right Channel DAC reconstruction filter's negative terminal is not routed to LOL
1: Right Channel DAC reconstruction filter's negative terminal is routed to LOL
D3
R/W
0
0: Left Channel DAC reconstruction filter output is not routed to LOL
1: Left Channel DAC reconstruction filter output is routed to LOL
D2
R
0
Reserved. Write only default value.
D1
R/W
0
0: MAL output is not routed to LOL
1: MAL output is routed to LOL
D0
R/W
0
0: LOR output is not routed to LOL
1: LOR output is routed to LOL(use when LOL&LOR output is powered by AVDD)
BIT
DESCRIPTION
Reserved. Write only default values
6.2.118 Page 1 / Register 15:
LOR Routing Selection Register
READ/
WRITE
RESET
VALUE
D7–D4
R
0000
D3
R/W
0
0: Right Channel DAC reconstruction filter output is not routed to LOR
1: Right Channel DAC reconstruction filter output is routed to LOR
D2
R
0
Reserved. Write only default value.
D1
R/W
0
0: MAR output is not routed to LOR
1: MAR output is routed to LOR
D0
R
0
Reserved. Write only default value.
BIT
DESCRIPTION
Reserved. Write only default values
6.2.119 Page 1 / Register 16:
HPL Driver Gain Setting Register
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
1
0: HPL driver is not muted
1: HPL driver is muted
D5–D0
R/W
00 0000
BIT
DESCRIPTION
10 0000-11 1001: Reserved. Do not use
11 1010: HPL driver gain is -6dB
(Note: It is not possible to mute HPL while programmed to -6dB)
11 1011: HPL driver gain is -5dB
11 1100: HPL driver gain is -4dB
…
00 0000: HPL driver gain is 0dB
...
01 1011: HPL driver gain is 27dB
01 1100: HPL driver gain is 28dB
01 1101: HPL driver gain is 29dB
01 1110-01 1111: Reserved. Do not use
Note: These gains are not valid while using the driver in Class-D mode
6.2.120 Page 1 / Register 17:
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
1
0: HPR driver is not muted
1: HPR driver is muted
BIT
136
HPR Driver Gain Setting Register
READ/
WRITE
REGISTER MAP
DESCRIPTION
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D0
R/W
00 0000
DESCRIPTION
10 0000-11 1001: Reserved. Do not use
11 1010: HPR driver gain is -6dB
(Note: It is not possible to mute HPR while programmed to -6dB)
11 1011: HPR driver gain is -5dB
11 1100: HPR driver gain is -4dB
…
00 0000: HPR driver gain is 0dB
...
01 1011: HPR driver gain is 27dB
01 1100: HPR driver gain is 28dB
01 1101: HPR driver gain is 29dB
01 1110-01 1111: Reserved. Do not use
Note: These gains are not valid while using the driver in Class-D mode
6.2.121 Page 1 / Register 18:
LOL Driver Gain Setting Register
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
1
0: LOL driver is not muted
1: LOL driver is muted
D5–D0
R/W
00 0000
BIT
DESCRIPTION
10
11
11
11
…
00
...
01
01
01
01
0000-11 1001: Reserved. Do not use
1010: LOL driver gain is -6dB
1011: LOL driver gain is -5dB
1100: LOL driver gain is -4dB
0000: LOL driver gain is 0dB
1011: LOL driver gain is 27dB
1100: LOL driver gain is 28dB
1101: LOL driver gain is 29dB
1110-01 1111: Reserved. Do not use
6.2.122 Page 1 / Register 19:
LOR Driver Gain Setting Register
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
1
0: LOR driver is not muted
1: LOR driver is muted
D5–D0
R/W
00 0000
DESCRIPTION
10
11
11
11
…
00
...
01
01
01
01
0000-11 1001: Reserved. Do not use
1010: LOR driver gain is -6dB
1011: LOR driver gain is -5dB
1100: LOR driver gain is -4dB
0000: LOR driver gain is 0dB
1011: LOR driver gain is 27dB
1100: LOR driver gain is 28dB
1101: LOR driver gain is 29dB
1110-01 1111: Reserved. Do not use
6.2.123 Page 1 / Register 20:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
Submit Documentation Feedback
Headphone Driver Startup Control Register
DESCRIPTION
00:
01:
10:
11:
Soft
Soft
Soft
Soft
routing step
routing step
routing step
routing step
time
time
time
time
is 0ms
is 50ms
is 100ms
is 200ms
REGISTER MAP
137
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D2
R/W
0000
D1–D0
R/W
00
DESCRIPTION
0000: Slow power up of headphone amp's is disabled
0001: Headphone amps power up slowly in 0.5 time constants
0010: Headphone amps power up slowly in 0.625 time constants
0011; Headphone amps power up slowly in 0.725 time constants
0100: Headphone amps power up slowly in 0.875 time constants
0101: Headphone amps power up slowly in 1.0 time constants
0110: Headphone amps power up slowly in 2.0 time constants
0111: Headphone amps power up slowly in 3.0 time constants
1000: Headphone amps power up slowly in 4.0 time constants
1001: Headphone amps power up slowly in 5.0 time constants
1010: Headphone amps power up slowly in 6.0 time constants
1011: Headphone amps power up slowly in 7.0 time constants
1100: Headphone amps power up slowly in 8.0 time constants
1101: Headphone amps power up slowly in 16.0 time constants ( do not use for Rchg=25K)
1110: Headphone amps power up slowly in 24.0 time constants (do not use for Rchg=25K)
1111: Headphone amps power up slowly in 32.0 time constants (do not use for Rchg=25K)
Note: Time constants assume 47uF decoupling cap
00:
01:
10:
11:
6.2.124 Page 1 / Register 21:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
138
READ/
WRITE
RESET
VALUE
D7
R
0
REGISTER MAP
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.125 Page 1 / Register 22:
BIT
Headphone amps power up time is determined with 25K resistance
Headphone amps power up time is determined with 6K resistance
Headphone amps power up time is determined with 2K resistance
Reserved. Do not use
IN1L to HPL Volume Control Register
DESCRIPTION
Reserved. Write only default value.
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D0
R/W
000 0000
Submit Documentation Feedback
DESCRIPTION
IN1L to HPL Volume Control
000 0000: Volume Control = 0.0dB
000 0001: Volume Control = -0.5dB
000 0010: Volume Control = -1.0dB
000 0011: Volume Control = -1.5dB
000 0100: Volume Control = -2.0dB
000 0101: Volume Control = -2.5dB
000 0110: Volume Control = -3.0dB
000 0111: Volume Control = -3.5dB
000 1000: Volume Control = -4.0dB
000 1001: Volume Control = -4.5dB
000 1010: Volume Control = -5.0dB
000 1011: Volume Control = -5.5dB
000 1100: Volume Control = -6.0dB
000 1101: Volume Control = -7.0dB
000 1110: Volume Control = -8.0dB
000 1111: Volume Control = -8.5dB
001 0000: Volume Control = -9.0dB
001 0001: Volume Control = -9.5dB
001 0010: Volume Control = -10.0dB
001 0011: Volume Control = -10.5dB
001 0100: Volume Control = -11.0dB
001 0101: Volume Control = -11.5dB
001 0110: Volume Control = -12.0dB
001 0111: Volume Control = -12.5dB
001 1000: Volume Control = -13.0dB
001 1001: Volume Control = -13.5dB
001 1010: Volume Control = -14.0dB
001 1011: Volume Control = -14.5dB
001 1100: Volume Control = -15.0dB
001 1101: Volume Control = -15.5dB
001 1110: Volume Control = -16.0dB
001 1111: Volume Control = -16.5dB
010 0000: Volume Control = -17.1dB
010 0001: Volume Control = -17.5dB
010 0010: Volume Control = -18.1dB
010 0011: Volume Control = -18.6dB
010 0100: Volume Control = -19.1dB
010 0101: Volume Control = -19.6dB
010 0110: Volume Control = -20.1dB
010 0111: Volume Control = -20.6dB
010 1000: Volume Control = -21.1dB
010 1001: Volume Control = -21.6dB
010 1010: Volume Control = -22.1dB
010 1011: Volume Control = -22.6dB
010 1100: Volume Control = -23.1dB
010 1101: Volume Control = -23.6dB
010 1110: Volume Control = -24.1dB
010 1111: Volume Control = -24.6dB
011 0000: Volume Control = -25.1dB
011 0001: Volume Control = -25.6dB
011 0010: Volume Control = -26.1dB
011 0011: Volume Control = -26.6dB
011 0100: Volume Control = -27.1dB
011 0101: Volume Control = -27.6dB
011 0110: Volume Control = -28.1dB
011 0111: Volume Control = -28.6dB
011 1000: Volume Control = -29.1dB
011 1001: Volume Control = -29.6dB
011 1010: Volume Control = -30.1dB
011 1011: Volume Control = -30.6dB
011 1100: Volume Control = -31.1dB
011 1100: Volume Control = -31.6dB
011 1101: Volume Control = -32.1dB
011 1110: Volume Control = -32.6dB
011 1111: Volume Control = -33.1dB
100 0000: Volume Control = -33.6dB
100 0001: Volume Control = -34.1dB
REGISTER MAP
139
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
DESCRIPTION
100 0010: Volume Control = -34.6dB
100 0011: Volume Control = -35.2dB
100 0100: Volume Control = -35.7dB
100 0101: Volume Control = -36.2dB
100 0110: Volume Control = -36.7dB
100 0111: Volume Control = -37.2dB
100 1000: Volume Control = -37.7dB
100 1001: Volume Control = -38.2dB
100 1010: Volume Control = -38.7dB
100 1011: Volume Control = -39.2dB
100 1100: Volume Control = -39.7dB
100 1101: Volume Control = -40.2dB
100 1110: Volume Control = -40.7dB
100 1111: Volume Control = -41.2dB
101 0000: Volume Control = -41.7dB
101 0001: Volume Control = -42.1dB
101 0010: Volume Control = -42.7dB
101 0011: Volume Control = -43.2dB
101 0100: Volume Control = -43.8dB
101 0101: Volume Control = -44.3dB
101 0110: Volume Control = -44.8dB
101 0111: Volume Control = -45.2dB
101 1000: Volume Control = -45.8dB
101 1001: Volume Control = -46.2dB
101 1010: Volume Control = -46.7dB
101 1011: Volume Control = -47.4dB
101 1100: Volume Control = -47.9dB
101 1101: Volume Control = -48.2dB
101 1110: Volume Control = -48.7dB
101 1111: Volume Control = -49.3dB
110 0000: Volume Control = -50.0dB
110 0001: Volume Control = -50.3dB
110 0010: Volume Control = -51.0dB
110 0011: Volume Control = -51.42dB
110 0100: Volume Control = -51.82dB
110 0101: Volume Control = -52.3dB
110 0110: Volume Control = -52.7dB
110 0111: Volume Control = -53.7dB
110 1000: Volume Control = -54.2dB
110 1001: Volume Control = -55.4dB
110 1010: Volume Control = -56.7dB
110 1011: Volume Control = -58.3dB
110 1100: Volume Control = -60.2dB
110 1101: Volume Control = -62.7dB
110 1110: Volume Control = -64.3dB
110 1111: Volume Control = -66.2dB
111 0000: Volume Control = -68.7dB
111 0001: Volume Control = -72.3dB
111 0010: Volume Control = MUTE
111 0011-111 1111: Reserved. Do not use
6.2.126 Page 1 / Register 23:
140
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
REGISTER MAP
IN1R to HPR Volume Control Register
DESCRIPTION
Reserved. Write only default value
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6–D0
R/W
000 0000
Submit Documentation Feedback
DESCRIPTION
IN1R to HPR Volume Control
000 0000: Volume Control = 0.0dB
000 0001: Volume Control = -0.5dB
000 0010: Volume Control = -1.0dB
000 0011: Volume Control = -1.5dB
000 0100: Volume Control = -2.0dB
000 0101: Volume Control = -2.5dB
000 0110: Volume Control = -3.0dB
000 0111: Volume Control = -3.5dB
000 1000: Volume Control = -4.0dB
000 1001: Volume Control = -4.5dB
000 1010: Volume Control = -5.0dB
000 1011: Volume Control = -5.5dB
000 1100: Volume Control = -6.0dB
000 1101: Volume Control = -7.0dB
000 1110: Volume Control = -8.0dB
000 1111: Volume Control = -8.5dB
001 0000: Volume Control = -9.0dB
001 0001: Volume Control = -9.5dB
001 0010: Volume Control = -10.0dB
001 0011: Volume Control = -10.5dB
001 0100: Volume Control = -11.0dB
001 0101: Volume Control = -11.5dB
001 0110: Volume Control = -12.0dB
001 0111: Volume Control = -12.5dB
001 1000: Volume Control = -13.0dB
001 1001: Volume Control = -13.5dB
001 1010: Volume Control = -14.0dB
001 1011: Volume Control = -14.5dB
001 1100: Volume Control = -15.0dB
001 1101: Volume Control = -15.5dB
001 1110: Volume Control = -16.0dB
001 1111: Volume Control = -16.5dB
010 0000: Volume Control = -17.1dB
010 0001: Volume Control = -17.5dB
010 0010: Volume Control = -18.1dB
010 0011: Volume Control = -18.6dB
010 0100: Volume Control = -19.1dB
010 0101: Volume Control = -19.6dB
010 0110: Volume Control = -20.1dB
010 0111: Volume Control = -20.6dB
010 1000: Volume Control = -21.1dB
010 1001: Volume Control = -21.6dB
010 1010: Volume Control = -22.1dB
010 1011: Volume Control = -22.6dB
010 1100: Volume Control = -23.1dB
010 1101: Volume Control = -23.6dB
010 1110: Volume Control = -24.1dB
010 1111: Volume Control = -24.6dB
011 0000: Volume Control = -25.1dB
011 0001: Volume Control = -25.6dB
011 0010: Volume Control = -26.1dB
011 0011: Volume Control = -26.6dB
011 0100: Volume Control = -27.1dB
011 0101: Volume Control = -27.6dB
011 0110: Volume Control = -28.1dB
011 0111: Volume Control = -28.6dB
011 1000: Volume Control = -29.1dB
011 1001: Volume Control = -29.6dB
011 1010: Volume Control = -30.1dB
011 1011: Volume Control = -30.6dB
011 1100: Volume Control = -31.1dB
011 1100: Volume Control = -31.6dB
011 1101: Volume Control = -32.1dB
011 1110: Volume Control = -32.6dB
011 1111: Volume Control = -33.1dB
100 0000: Volume Control = -33.6dB
100 0001: Volume Control = -34.1dB
REGISTER MAP
141
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
READ/
WRITE
BIT
RESET
VALUE
DESCRIPTION
100 0010: Volume Control = -34.6dB
100 0011: Volume Control = -35.2dB
100 0100: Volume Control = -35.7dB
100 0101: Volume Control = -36.2dB
100 0110: Volume Control = -36.7dB
100 0111: Volume Control = -37.2dB
100 1000: Volume Control = -37.7dB
100 1001: Volume Control = -38.2dB
100 1010: Volume Control = -38.7dB
100 1011: Volume Control = -39.2dB
100 1100: Volume Control = -39.7dB
100 1101: Volume Control = -40.2dB
100 1110: Volume Control = -40.7dB
100 1111: Volume Control = -41.2dB
101 0000: Volume Control = -41.7dB
101 0001: Volume Control = -42.1dB
101 0010: Volume Control = -42.7dB
101 0011: Volume Control = -43.2dB
101 0100: Volume Control = -43.8dB
101 0101: Volume Control = -44.3dB
101 0110: Volume Control = -44.8dB
101 0111: Volume Control = -45.2dB
101 1000: Volume Control = -45.8dB
101 1001: Volume Control = -46.2dB
101 1010: Volume Control = -46.7dB
101 1011: Volume Control = -47.4dB
101 1100: Volume Control = -47.9dB
101 1101: Volume Control = -48.2dB
101 1110: Volume Control = -48.7dB
101 1111: Volume Control = -49.3dB
110 0000: Volume Control = -50.0dB
110 0001: Volume Control = -50.3dB
110 0010: Volume Control = -51.0dB
110 0011: Volume Control = -51.42dB
110 0100: Volume Control = -51.82dB
110 0101: Volume Control = -52.3dB
110 0110: Volume Control = -52.7dB
110 0111: Volume Control = -53.7dB
110 1000: Volume Control = -54.2dB
110 1001: Volume Control = -55.4dB
110 1010: Volume Control = -56.7dB
110 1011: Volume Control = -58.3dB
110 1100: Volume Control = -60.2dB
110 1101: Volume Control = -62.7dB
110 1110: Volume Control = -64.3dB
110 1111: Volume Control = -66.2dB
111 0000: Volume Control = -68.7dB
111 0001: Volume Control = -72.3dB
111 0010: Volume Control = MUTE
111 0011-111 1111: Reserved. Do not use
6.2.127 Page 1 / Register 24:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R
00
142
REGISTER MAP
MAL Volume Control Register
DESCRIPTION
Reserved. Write only default values
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D0
R/W
00 0000
DESCRIPTION
MAL Volume Control
00 0000: Volume Control = 0.0dB
00 0001: Volume Control = -0.4dB
00 0010: Volume Control = -0.9dB
00 0011: Volume Control = -1.3dB
00 0100: Volume Control = -1.8dB
00 0101: Volume Control = -2.3dB
00 0110: Volume Control = -2.9dB
00 0111: Volume Control = -3.3dB
00 1000: Volume Control = -3.9dB
00 1001: Volume Control = -4.3dB
00 1010: Volume Control = -4.8dB
00 1011: Volume Control = -5.2dB
00 1100: Volume Control = -5.8dB
00 1101: Volume Control = -6.3dB
00 1110: Volume Control = -6.6dB
00 1111: Volume Control = -7.2dB
01 0000: Volume Control = -7.8dB
01 0001: Volume Control = -8.2dB
01 0010: Volume Control = -8.5dB
01 0011: Volume Control = -9.3dB
01 0100: Volume Control = -9.7dB
01 0101: Volume Control = -10.1dB
01 0110: Volume Control = -10.6dB
01 0111: Volume Control = -11.0dB
01 1000: Volume Control = -11.5dB
01 1001: Volume Control = -12.0dB
01 1010: Volume Control = -12.6dB
01 1011: Volume Control = -13.2dB
01 1100: Volume Control = -13.8dB
01 1101: Volume Control = -14.5dB
01 1110: Volume Control = -15.3dB
01 1111: Volume Control = -16.1dB
10 0000: Volume Control = -17.0dB
10 0001: Volume Control = -18.1dB
10 0010: Volume Control = -19.2dB
10 0011: Volume Control = -20.6dB
10 0100: Volume Control = -22.1dB
10 0101: Volume Control = -24.1dB
10 0110: Volume Control = -26.6dB
10 0111: Volume Control = -30.1dB
10 1000: Volume Control = MUTE
10 1001-11 1111: Reserved. Do no use
6.2.128 Page 1 / Register 25:
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R
00
Submit Documentation Feedback
MAR Volume Control Register
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
143
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
(continued)
BIT
READ/
WRITE
RESET
VALUE
D5–D0
R/W
00 0000
DESCRIPTION
MAR Volume Control
00 0000: Volume Control = 0.0dB
00 0001: Volume Control = -0.4dB
00 0010: Volume Control = -0.9dB
00 0011: Volume Control = -1.3dB
00 0100: Volume Control = -1.8dB
00 0101: Volume Control = -2.3dB
00 0110: Volume Control = -2.9dB
00 0111: Volume Control = -3.3dB
00 1000: Volume Control = -3.9dB
00 1001: Volume Control = -4.3dB
00 1010: Volume Control = -4.8dB
00 1011: Volume Control = -5.2dB
00 1100: Volume Control = -5.8dB
00 1101: Volume Control = -6.3dB
00 1110: Volume Control = -6.6dB
00 1111: Volume Control = -7.2dB
01 0000: Volume Control = -7.8dB
01 0001: Volume Control = -8.2dB
01 0010: Volume Control = -8.5dB
01 0011: Volume Control = -9.3dB
01 0100: Volume Control = -9.7dB
01 0101: Volume Control = -10.1dB
01 0110: Volume Control = -10.6dB
01 0111: Volume Control = -11.0dB
01 1000: Volume Control = -11.5dB
01 1001: Volume Control = -12.0dB
01 1010: Volume Control = -12.6dB
01 1011: Volume Control = -13.2dB
01 1100: Volume Control = -13.8dB
01 1101: Volume Control = -14.5dB
01 1110: Volume Control = -15.3dB
01 1111: Volume Control = -16.1dB
10 0000: Volume Control = -17.0dB
10 0001: Volume Control = -18.1dB
10 0010: Volume Control = -19.2dB
10 0011: Volume Control = -20.6dB
10 0100: Volume Control = -22.1dB
10 0101: Volume Control = -24.1dB
10 0110: Volume Control = -26.6dB
10 0111: Volume Control = -30.1dB
10 1000: Volume Control = MUTE
10 1001-11 1111: Reserved. Do no use
6.2.129 Page 1 / Register 26-50:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.130 Page 1 / Register 51:
MICBIAS Configuration Register
READ/
WRITE
RESET
VALUE
D7
R
0
Reserved. Write only default value.
D6
R/W
0
0: MICBIAS powered down
1: MICBIAS powered up
D5–D4
R/W
00
MICBIAS Output Voltage Configuration
00: MICBIAS = 1.04V (CM=0.75V) or MICBIAS = 1.25V(CM=0.9V)
01: MICBIAS = 1.425V(CM=0.75V) or MICBIAS = 1.7V(CM=0.9V)
10: MICBIAS = 2.075V(CM=0.75V) or MICBIAS = 2.5V(CM=0.9V)
11: MICBIAS is switch to power supply
D3
R/W
0
0: MICBIAS voltage is generated from AVDD
1: MICBIAS voltage is generated from LDOIN
BIT
144
REGISTER MAP
DESCRIPTION
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D2–D0
R
000
DESCRIPTION
Reserved. Write only default value.
6.2.131 Page 1 / Register 52:
Configuration Register
Left MICPGA Positive Terminal Input Routing
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
IN1L to Left MICPGA positive terminal selection
00: IN1L is not routed to Left MICPGA
01: IN1L is routed to Left MICPGA with 10K resistance
10: IN1L is routed to Left MICPGA with 20K resistance
11: IN1L is routed to Left MICPGA with 40K resistance
D5–D4
R/W
00
IN2L to Left MICPGA positive terminal selection
00: IN2L is not routed to Left MICPGA
01: IN2L is routed to Left MICPGA with 10K resistance
10: IN2L is routed to Left MICPGA with 20K resistance
11: IN2L is routed to Left MICPGA with 40K resistance
D3–D2
R/W
00
IN3L to Left MICPGA positive terminal selection
00: IN3L is not routed to Left MICPGA
01: IN3L is routed to Left MICPGA with 10K resistance
10: IN3L is routed to Left MICPGA with 20K resistance
11: IN3L is routed to Left MICPGA with 40K resistance
D1–D0
R/W
00
IN1R to Left MICPGA positive terminal selection
00: IN1R is not routed to Left MICPGA
01: IN1R is routed to Left MICPGA with 10K resistance
10: IN1R is routed to Left MICPGA with 20K resistance
11: IN1R is routed to Left MICPGA with 40K resistance
DESCRIPTION
6.2.132 Page 1 / Register 53:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.133 Page 1 / Register 54:
Configuration Register
Left MICPGA Negative Terminal Input Routing
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
CM to Left MICPGA (CM1L) positive terminal selection
00: CM is not routed to Left MICPGA
01: CM is routed to Left MICPGA via CM1L with 10K resistance
10: CM is routed to Left MICPGA via CM1L with 20K resistance
11: CM is routed to Left MICPGA via CM1L with 40K resistance
D5–D4
R/W
00
IN2R to Left MICPGA positive terminal selection
00: IN2R is not routed to Left MICPGA
01: IN2R is routed to Left MICPGA with 10K resistance
10: IN2R is routed to Left MICPGA with 20K resistance
11: IN2R is routed to Left MICPGA with 40K resistance
D3–D2
R/W
00
IN3R to Left MICPGA positive terminal selection
00: IN3R is not routed to Left MICPGA
01: IN3R is routed to Left MICPGA with 10K resistance
10: IN3R is routed to Left MICPGA with 20K resistance
11: IN3R is routed to Left MICPGA with 40K resistance
D1–D0
R/W
00
CM to Left MICPGA (CM2L) positive terminal selection
00: CM is not routed to Left MICPGA
01: CM is routed to Left MICPGA via CM2L with 10K resistance
10: CM is routed to Left MICPGA via CM2L with 20K resistance
11: CM is routed to Left MICPGA via CM2L with 40K resistance
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DESCRIPTION
REGISTER MAP
145
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.134 Page 1 / Register 55:
Configuration Register
www.ti.com
Right MICPGA Positive Terminal Input Routing
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
IN1R to Right MICPGA positive terminal selection
00: IN1R is not routed to Right MICPGA
01: IN1R is routed to Right MICPGA with 10K resistance
10: IN1R is routed to Right MICPGA with 20K resistance
11: IN1R is routed to Right MICPGA with 40K resistance
D5–D4
R/W
00
IN2R to Right MICPGA positive terminal selection
00: IN2R is not routed to Right MICPGA
01: IN2R is routed to Right MICPGA with 10K resistance
10: IN2R is routed to Right MICPGA with 20K resistance
11: IN2R is routed to Right MICPGA with 40K resistance
D3–D2
R/W
00
IN3R to Right MICPGA positive terminal selection
00: IN3R is not routed to Right MICPGA
01: IN3R is routed to Right MICPGA with 10K resistance
10: IN3R is routed to Right MICPGA with 20K resistance
11: IN3R is routed to Right MICPGA with 40K resistance
D1–D0
R/W
00
IN2L to Right MICPGA positive terminal selection
00: IN2L is not routed to Right MICPGA
01: IN2L is routed to Right MICPGA with 10K resistance
10: IN2L is routed to Right MICPGA with 20K resistance
11: IN2L is routed to Right MICPGA with 40K resistance
DESCRIPTION
6.2.135 Page 1 / Register 56:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved Register
DESCRIPTION
Reserved. Write only default values
6.2.136 Page 1 / Register 57:
Configuration Register
Right MICPGA Negative Terminal Input Routing
BIT
READ/
WRITE
RESET
VALUE
D7–D6
R/W
00
CM to Right MICPGA (CM1R) positive terminal selection
00: CM is not routed to Right MICPGA
01: CM is routed to Right MICPGA via CM1R with 10K resistance
10: CM is routed to Right MICPGA via CM1R with 20K resistance
11: CM is routed to Right MICPGA via CM1R with 40K resistance
D5–D4
R/W
00
IN1L to Right MICPGA positive terminal selection
00: IN1L is not routed to Right MICPGA
01: IN1L is routed to Right MICPGA with 10K resistance
10: IN1L is routed to Right MICPGA with 20K resistance
11: IN1L is routed to Right MICPGA with 40K resistance
D3–D2
R/W
00
IN3L to Right MICPGA positive terminal selection
00: IN3L is not routed to Right MICPGA
01: IN3L is routed to Right MICPGA with 10K resistance
10: IN3L is routed to Right MICPGA with 20K resistance
11: IN3L is routed to Right MICPGA with 40K resistance
D1–D0
R/W
00
CM to Right MICPGA (CM2R) positive terminal selection
00: CM is not routed to Right MICPGA
01: CM is routed to Right MICPGA via CM2R with 10K resistance
10: CM is routed to Right MICPGA via CM2R with 20K resistance
11: CM is routed to Right MICPGA via CM2R with 40K resistance
DESCRIPTION
6.2.137 Page 1 / Register 58:
146
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
0
REGISTER MAP
Floating Input Configuration Register
DESCRIPTION
0: IN1L input is not weakly connected to common mode
1: IN1L input is weakly driven to common mode. Use when not routing IN1L to Left and Right
MICPGA and HPL
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D6
R/W
0
0: IN1R input is not weakly connected to common mode
1: IN1R input is weakly driven to common mode. Use when not routing IN1L to Left and Right
MICPGA and HPR
D5
R/W
0
0: IN2L input is not weakly connected to common mode
1: IN2L input is weakly driven to common mode. Use when not routing IN2L to Left and Right
MICPGA
D4
R/W
0
0: IN2R input is not weakly connected to common mode
1: IN2R input is weakly driven to common mode. Use when not routing IN2R to Left and Right
MICPGA
D3
R/W
0
0: IN3L input is not weakly connected to common mode
1: IN3L input is weakly driven to common mode. Use when not routing IN3L to Left and Right
MICPGA
D2
R/W
0
0: IN3R input is not weakly connected to common mode
1: IN3R input is weakly driven to common mode. Use when not routing IN3R to Left and Right
MICPGA
D1–D0
R
00
Reserved. Write only default values
DESCRIPTION
6.2.138 Page 1 / Register 59:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
1
D6–D0
R/W
000 0000
DESCRIPTION
0: Left MICPGA Gain is enabled
1: Left MICPGA Gain is set to 0dB
Left MICPGA Volume Control
000 0000: Volume Control = 0.0dB
000 0001: Volume Control = 0.5dB
000 0010: Volume Control = 1.0dB
…
101 1101: Volume Control = 46.5dB
101 1110: Volume Control = 47.0dB
101 1111: Volume Control = 47.5dB
110 0000-111 1111: Reserved. Do not use
6.2.139 Page 1 / Register 60:
BIT
READ/
WRITE
RESET
VALUE
D7
R/W
1
D6–D0
R/W
000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
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Right MICPGA Volume Control Register
DESCRIPTION
0: Right MICPGA Gain is enabled
1: Right MICPGA Gain is set to 0dB
Right MICPGA Volume Control
000 0000: Volume Control = 0.0dB
000 0001: Volume Control = 0.5dB
000 0010: Volume Control = 1.0dB
…
101 1101: Volume Control = 46.5dB
101 1110: Volume Control = 47.0dB
101 1111: Volume Control = 47.5dB
110 0000-111 1111: Reserved. Do not use
6.2.140 Page 1 / Register 61:
BIT
Left MICPGA Volume Control Register
ADC Power Tune Configuration Register
DESCRIPTION
0000
0110
1011
1111
0000: PTM_R4 (Default)
0100: PTM_R3
0110: PTM_R2
1111: PTM_R1
REGISTER MAP
147
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.141 Page 1 / Register 62:
www.ti.com
ADC Analog Volume Control Flag Register
BIT
READ/
WRITE
RESET
VALUE
D7–D2
R
00 0000
D1
R
0
Left Channel Analog Volume Control Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
D0
R
0
Right Channel Analog Volume Control Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
DESCRIPTION
Reserved. Write only default values
6.2.142 Page 1 / Register 63:
BIT
READ/
WRITE
RESET
VALUE
D7
R
0
HPL Gain Flag
0: Applied Gain is not equal to Programmed Gain
1: Applied Gain is equal to Programmed Gain
D6
R
0
HPR Gain Flag
0: Applied Gain is not equal to Programmed Gain
1: Applied Gain is equal to Programmed Gain
D5
R
0
LOL Gain Flag
0: Applied Gain is not equal to Programmed Gain
1: Applied Gain is equal to Programmed Gain
D4
R
0
LOR Gain Flag
0: Applied Gain is not equal to Programmed Gain
1: Applied Gain is equal to Programmed Gain
D3
R
0
IN1L to HPL Bypass Volume Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
D2
R
0
IN1R to HPR Bypass Volume Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
D1
R
0
MAL Volume Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
D0
R
0
MAR Volume Flag
0: Applied Volume is not equal to Programmed Volume
1: Applied Volume is equal to Programmed Volume
DESCRIPTION
6.2.143 Page 1 / Register 64-70:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
READ/
WRITE
BIT
Reserved. Write only default values
Analog Input Quick Charging Configuration Register
RESET
VALUE
D7–D6
R
00
D5–D0
R/W
00 0000
DESCRIPTION
Reserved. Write only default values
Analog inputs power up time
00 0000: Default. Use one of the values give below
11 0001: Analog inputs power up time is 3.1 ms
11 0010: Analog inputs power up time is 6.4 ms
11 0011: Analog inputs power up time is 1.6 ms
Others: Do not use
6.2.145 Page 1 / Register 72-122:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
REGISTER MAP
Reserved Register
DESCRIPTION
6.2.144 Page 1 / Register 71:
148
DAC Analog Gain Control Flag Register
Reserved Register
DESCRIPTION
Reserved. Write only default values
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.146 Page 1 / Register 123:
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R
0 0000
D2–D0
R/W
000
Reference Power-up Configuration Register
DESCRIPTION
Reserved. Write only default values
Reference Power Up configuration
000: Reference will power up slowly when analog blocks are powered up
001: Reference will power up in 40ms when analog blocks are powered up
010: Reference will power up in 80ms when analog blocks are powered up
011: Reference will power up in 120ms when analog blocks are powered up
100: Force power up of reference. Power up will be slow
101: Force power up of reference. Power up time will be 40ms
110: Force power up of reference. Power up time will be 80ms
111: Force power up of reference. Power up time will be 120ms
6.2.147 Page 1 / Register 124-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Reserved. Write only default values
6.2.148 Page 8 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
Reserved Register
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.149 Page 8 / Register 1:
ADC Adaptive Filter Configuration Register
READ/
WRITE
RESET
VALUE
D7–D3
R
0000 0
D2
R/W
0
ADC Adaptive Filtering Control
0: Adaptive Filtering disabled for ADC
1: Adaptive Filtering enabled for ADC
D1
R
0
ADC Adaptive Filter Buffer Control Flag
0: In adaptive filter mode, ADC accesses ADC Coefficient Buffer-A and control interface accesses
ADC Coefficient Buffer-B
1: In adaptive filter mode, ADC accesses ADC Coefficient Buffer-B and control interface accesses
ADC Coefficient Buffer-A
D0
R/W
0
ADC Adaptive Filter Buffer Switch control
0: ADC Coefficient Buffers will not be switched at next frame boundary
1: ADC Coefficient Buffers will be switched at next frame boundary, if in adaptive filtering mode.
This will self clear on switching.
BIT
DESCRIPTION
Reserved. Write only default values
6.2.150 Page 8 / Register 1-7:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
DESCRIPTION
Reserved. Write only default values
6.2.151 Page 8 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
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Reserved
ADC Coefficients Buffer-A C(0:29)
DESCRIPTION
24-bit coefficients C0 through C29 of ADC Coefficient Buffer-A. Refer Table ?? for details
When Page-8, Reg-01d, D2='0' the read write access to these registers is allowed only when ADC
channel is powered down
REGISTER MAP
149
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.2.152 Page 9-16 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.153 Page 9-16 / Register 1-7:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved
DESCRIPTION
Reserved. Write only default values
6.2.154 Page 9-16 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
24-bit coefficients ADC Coefficient Buffer-A. Refer Table ?? for details
When Page-8, Reg-01d, D2='0' (Adaptive filtering disabled) the read write access to these registers
is allowed only when ADC channel is powered down
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.156 Page 26-34 / Register 1-7:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
Reserved. Write only default values
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
ADC Coefficients Buffer-B C(0:255)
DESCRIPTION
24-bit coefficients of ADC Coefficient Buffer-B. Refer Table ?? for details
When Page-8, Reg-01d, D2='0' (Adaptive filtering disabled) the read write access to these registers
is allowed only when ADC channel is powered down
6.2.158 Page 44 / Register 0:
BIT
Reserved.
DESCRIPTION
6.2.157 Page 26-34 / Register 8-127:
BIT
ADC Coefficients Buffer-A C(30:255)
DESCRIPTION
6.2.155 Page 26-34 / Register 0:
BIT
www.ti.com
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.159 Page 44 / Register 1:
DAC Adaptive Filter Configuration Register
BIT
READ/
WRITE
RESET
VALUE
D7–D3
R
0000 0
D2
R/W
0
DAC Adaptive Filtering Control
0: Adaptive Filtering disabled for DAC
1: Adaptive Filtering enabled for DAC
D1
R
0
DAC Adaptive Filter Buffer Control Flag
0: In adaptive filter mode, DAC accesses DAC Coefficient Buffer-A and control interface accesses
DAC Coefficient Buffer-B
1: In adaptive filter mode, DAC accesses DAC Coefficient Buffer-B and control interface accesses
DAC Coefficient Buffer-A
150
REGISTER MAP
DESCRIPTION
Reserved. Write only default values
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
(continued)
BIT
READ/
WRITE
RESET
VALUE
D0
R/W
0
DESCRIPTION
DAC Adaptive Filter Buffer Switch control
0: DAC Coefficient Buffers will not be switched at next frame boundary
1: DAC Coefficient Buffers will be switched at next frame boundary, if in adaptive filtering mode.
This will self clear on switching.
6.2.160 Page 44 / Register 1-7:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved
DESCRIPTION
Reserved. Write only default values
6.2.161 Page 44 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
DESCRIPTION
24-bit coefficients C0 through C29 of DAC Coefficient Buffer-A. Refer Table ?? for details
When Page-44, Reg-01d, D2='0' the read write access to these registers is allowed only when
DAC channel is powered down
6.2.162 Page 45-52 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
Reserved. Write only default values
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
24-bit coefficients DAC Coefficient Buffer-A. Refer Table ?? for details
When Page-44, Reg-01d, D2='0' (Adaptive filtering disabled) the read write access to these
registers is allowed only when DAC channel is powered down
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Submit Documentation Feedback
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.166 Page 62-70 / Register 1-7:
BIT
DAC Coefficients Buffer-A C(30:255)
DESCRIPTION
6.2.165 Page 62-70 / Register 0:
BIT
Reserved.
DESCRIPTION
6.2.164 Page 45-52 / Register 8-127:
BIT
Page Select Register
DESCRIPTION
6.2.163 Page 45-52 / Register 1-7:
BIT
DAC Coefficients Buffer-A C(0:29)
Reserved.
DESCRIPTION
Reserved. Write only default values
REGISTER MAP
151
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
6.2.167 Page 62-70 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
DESCRIPTION
24-bit coefficients of DAC Coefficient Buffer-B. Refer Table ?? for details
When Page-44, Reg-01d, D2='0' (Adaptive filtering disabled) the read write access to these
registers is allowed only when DAC channel is powered down
6.2.168 Page 80-114 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
DAC Coefficients Buffer-B C(0:255)
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.169 Page 80-114 / Register 1-7:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Reserved.
DESCRIPTION
Reserved. Write only default values
6.2.170 Page 80-114 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
DESCRIPTION
24 bit instructions for ADC miniDSP engine. For details refer Table ?? in the datasheet. These
instructions control the operation of ADC miniDSP mode. When the fully programmable miniDSP
mode is enabled and ADC channel is powered up, the read and write access to these registers is
disabled.
6.2.171 Page 152-186 / Register 0:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
0000 0000
READ/
WRITE
RESET
VALUE
D7–D0
R
0000 0000
Page Select Register
DESCRIPTION
Page Select Register
0-255: Selects the Register Page for next read or write command.
Refer Table "Summary of Memory Map" for details.
6.2.172 Page 152-186 / Register 1-7:
BIT
ADC miniDSP Instructions
Reserved.
DESCRIPTION
Reserved. Write only default values
6.2.173 Page 152-186 / Register 8-127:
BIT
READ/
WRITE
RESET
VALUE
D7–D0
R/W
xxxx xxxx
DAC miniDSP Instructions
DESCRIPTION
24 bit instructions for DAC miniDSP engine. For details refer Table ?? in the datasheet. These
instructions control the operation of DAC miniDSP mode. When the fully programmable miniDSP
mode is enabled and DAC channel is powered up, the read and write access to these registers is
disabled.
6.3 ADC Coefficients A+B
Table 6-2. ADC Coefficient Buffer-A Map
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
C0
8
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C1
8
12
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C29
8
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
152
REGISTER MAP
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Table 6-2. ADC Coefficient Buffer-A Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
C30
9
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C59
9
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C60
10
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C89
10
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C90
11
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C119
11
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C120
12
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C149
12
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C150
13
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C179
13
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C180
14
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C209
14
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C210
15
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C239
15
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C240
16
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C255
16
68
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
Table 6-3. ADC Coefficient Buffer-B Map
Coef No
Page No
Base Register Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
C0
26
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C1
26
12
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C29
26
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C30
27
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C59
27
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C60
28
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C89
28
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C90
29
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C119
29
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C120
30
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C149
30
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C150
31
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C179
31
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C180
32
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
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153
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Table 6-3. ADC Coefficient Buffer-B Map (continued)
Coef No
Page No
Base Register Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
…
..
..
..
..
..
..
C209
32
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C210
33
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C239
33
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C240
34
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C255
34
68
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
6.4 ADC Defaults
Table 6-4. Default values of ADC Coefficients in
Buffers A and B
ADC
Buffer-A,B
Coefficients
154
REGISTER MAP
Default Value at reset
C0
00000000H
C1
00170000H
C2
00170000H
C3
7DD30000H
C4
7FFFFF00H
C5,C6
00000000H
C7
7FFFFF00H
C8,..,C11
00000000H
C12
7FFFFF00H
C13,..,C16
00000000H
C17
7FFFFF00H
C18,..,C21
00000000H
C22
7FFFFF00H
C23,..,C26
00000000H
C27
7FFFFF00H
C28,..,C35
00000000H
C36
7FFFFF00H
C37,C38
00000000H
C39
7FFFFF00H
C40,..,C43
00000000H
C44
7FFFFF00H
C45,..,C48
00000000H
C49
7FFFFF00H
C50,..,C53
00000000H
C54
7FFFFF00H
C55,..,C58
00000000H
C59
7FFFFF00H
C60,..,C255
00000000H
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
6.5 DAC Coefficients A+B
Table 6-5. DAC Coefficient Buffer-A Map
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
C0
44
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C1
44
12
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C29
44
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C30
45
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C59
45
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C60
46
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C89
46
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C90
47
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C119
47
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C120
48
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C149
48
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C150
49
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C179
49
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C180
50
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C209
50
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C210
51
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C239
51
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C240
52
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C255
52
68
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
Table 6-6. DAC Coefficient Buffer-B Map
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
C0
62
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C1
62
12
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C29
62
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C30
63
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C59
63
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C60
64
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C89
64
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C90
65
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C119
65
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C120
66
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
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TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Table 6-6. DAC Coefficient Buffer-B Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
…
..
..
..
..
..
..
C149
66
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C150
67
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C179
67
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C180
68
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C209
68
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C210
69
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C239
69
124
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
C240
70
8
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
…
..
..
..
..
..
..
C255
70
68
Coef(23:16)
Coef(15:8)
Coef(7:0)
Reserved.
6.6 DAC Defaults
Table 6-7. Default values of DAC Coefficients in Buffers A and B
156
DAC Buffer-A,B Coefficients
Default Value at reset
C0
00000000H
C1
7FFFFF00H
C2,..,C5
00000000H
C6
7FFFFF00H
C7,..,C10
00000000H
C11
7FFFFF00H
C12,..,C15
00000000H
C16
7FFFFF00H
C17,..,C20
00000000H
C21
7FFFFF00H
C22,..,C25
00000000H
C26
7FFFFF00H
C27,..,C30
00000000H
C31,C32
00000000H
C33
7FFFFF00H
C34,..,C37
00000000H
C38
7FFFFF00H
C39,..,C42
00000000H
C43
7FFFFF00H
C44,..,C47
00000000H
C48
7FFFFF00H
C49,..,C52
00000000H
C53
7FFFFF00H
C54,..,C57
00000000H
C58
7FFFFF00H
C59,..,C64
00000000H
C65
7FFFFF00H
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Table 6-7. Default values of DAC Coefficients in Buffers A and B (continued)
DAC Buffer-A,B Coefficients
Default Value at reset
C66,C67
00000000H
C68
7FFFFF00H
C69,C70
00000000H
C71
7FF70000H
C72
10090000H
C73
7FEF0000H
C74,C75
00110000H
C76
7FDE0000H
C77,..,C255
00000000H
6.7 ADC miniDSP Instructions
Table 6-8. ADC miniDSP Instruction Map
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
I0
80
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I1
80
12
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I29
80
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I30
81
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I59
81
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I60
82
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I89
82
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I90
83
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I119
83
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I120
84
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I149
84
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I150
85
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I179
85
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I180
86
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I209
86
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I210
87
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I239
87
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I240
88
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I269
88
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I270
89
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I299
89
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I300
90
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
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157
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Table 6-8. ADC miniDSP Instruction Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
I329
90
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I330
91
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I359
91
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I360
92
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I389
92
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I390
93
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I419
93
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I420
94
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I449
94
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I450
95
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I479
95
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I480
96
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I509
96
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I510
97
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I539
97
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I540
98
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I569
98
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I570
99
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I599
99
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I600
100
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I629
100
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I630
101
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I659
101
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I660
102
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I689
102
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I690
103
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I719
103
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I720
104
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I749
104
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I750
105
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I779
105
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I780
106
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
158
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Ultra Low Power Stereo Audio Codec With Embedded miniDSP
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SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Table 6-8. ADC miniDSP Instruction Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
…
..
..
..
..
..
..
I809
106
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I810
107
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I839
107
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I840
108
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I869
108
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I870
109
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I899
109
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I900
110
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I929
110
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I930
111
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I959
111
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I960
112
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I989
112
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I990
113
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I1019
113
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I1020
114
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
..
..
..
..
..
..
I1023
114
20
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
6.8 DAC miniDSP Instructions
Table 6-9. DAC miniDSP Instruction Map
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
I0
152
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I1
152
12
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I29
152
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I30
153
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I59
153
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I60
154
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I89
154
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I90
155
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I119
155
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I120
156
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I149
156
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
Submit Documentation Feedback
REGISTER MAP
159
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
Table 6-9. DAC miniDSP Instruction Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
I150
157
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I179
157
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I180
158
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I209
158
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I210
159
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I239
159
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I240
160
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I269
160
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I270
161
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I299
161
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I300
162
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I329
162
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I330
163
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I359
163
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I360
164
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I389
164
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I390
165
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I419
165
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I420
166
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I449
166
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I450
167
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I479
167
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I480
168
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I509
168
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I510
169
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I539
169
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I540
170
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I569
170
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I570
171
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I599
171
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I600
172
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
160
REGISTER MAP
Submit Documentation Feedback
TLV320AIC3254
Ultra Low Power Stereo Audio Codec With Embedded miniDSP
www.ti.com
SLAS549A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Table 6-9. DAC miniDSP Instruction Map (continued)
Coef No
Page No
Base Register
Base Register + 0
Base Register + 1
Base Register + 2
Base Register + 3
I629
172
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I630
173
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I659
173
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I660
174
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I689
174
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I690
175
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I719
175
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I720
176
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I749
176
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I750
177
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I779
177
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I780
178
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I809
178
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I810
179
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I839
179
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I840
180
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I869
180
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I870
181
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I899
181
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I900
182
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I929
182
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I930
183
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I959
183
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I960
184
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I989
184
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I990
185
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I1019
185
124
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
I1020
186
8
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
…
…
..
..
..
..
..
I1023
186
20
Instr(23:16)
Instr(15:8)
Instr(7:0)
Reserved.
Submit Documentation Feedback
REGISTER MAP
161
PACKAGE OPTION ADDENDUM
www.ti.com
23-Oct-2008
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TLV320AIC3254IRHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
TLV320AIC3254IRHBT
ACTIVE
QFN
RHB
32
250
TBD
Lead/Ball Finish
CU NIPDAU
Call TI
MSL Peak Temp (3)
Level-3-260C-168 HR
Call TI
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Oct-2008
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
TLV320AIC3254IRHBR
Package Package Pins
Type Drawing
QFN
RHB
32
SPQ
Reel
Reel
Diameter Width
(mm) W1 (mm)
3000
330.0
12.4
Pack Materials-Page 1
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
5.3
5.3
1.5
8.0
W
Pin1
(mm) Quadrant
12.0
Q2
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Oct-2008
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
TLV320AIC3254IRHBR
QFN
RHB
32
3000
346.0
346.0
29.0
Pack Materials-Page 2
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