Wolfson WM9081-6222-CO28-M-REV2 User manual

w WM9081-6222-CO28-M-REV2
Example Configurations
WOLFSON MICROELECTRONICS plc
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May 2009, Rev 1.0
Copyright ©2009 Wolfson Microelectronics plc
DOC TYPE: EXAMPLE CONFIGURATIONS
BOARD REFERENCE: WM9081-6222-CO28-M-REV2
BOARD TYPE: Customer Mini Board
WOLFSON DEVICE(S): WM9081
DATE: May 2009
DOC REVISION: Rev 1.0
INTRODUCTION
The WM9081-6222-CO28-M-REV2 Customer Mini Board is compatible with the 6222-EV1 customer
evaluation board and together provide a complete hardware platform for evaluation of the WM9081.
The WM9081 Customer Mini Board can also be used independently and connected directly to a
processor board using flying wires or appropriate headers. This document will cover both, but
performance data will be based on the Wolfson system with 6222-EV1 main board. Configurations
covered are listed below:
•DAC playback to 4Ωspeaker (CLASS D, MAIN board)
•DAC playback to 4Ωspeaker (CLASS AB, MINI board)
•DAC playback to LINEOUT
•Bypass IN1 to 4Ωspeaker (CLASS D, MINI board)
This document should be used as a starting point for evaluation of WM9081 but it will not cover every
possible configuration.
Assumptions:
1. The user is familiar with the 6222-EV1 main board and the board is configured correctly for
the path of interest (see related documents below)
2. The user has set up WISCE as per instruction and has control of the DUT (register settings
provided in this document)
Related documents:
1. WM9081-6222-CO28-M_Schematic_Layout_rev_1.0.pdf
2. 6222-EV1-REV1_Schematic_Layout.pdf
3. WISCE Quick Start Guide.pdf

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 2
TABLE OF CONTENTS
INTRODUCTION............................................................................................................. 1
TABLE OF CONTENTS.................................................................................................. 2
BOARD CONFIGURATION STAND-ALONE................................................................. 3
CONNECTION DIAGRAM.........................................................................................................3
I/O TABLE..................................................................................................................................4
SHORTING POINTS AND JUMPER LINKS TABLE .................................................................5
BOARD CONFIGURATION WITH 6222-EV1-REV1 MAIN BOARD .............................. 6
DAC PLAYBACK TO 4ΩSPEAKER (CLASS D, MAIN BOARD) ..............................................6
DAC PLAYBACK TO 4ΩSPEAKER (CLASS AB, MINI BOARD) .............................................8
DAC PLAYBACK TO LINEOUT...............................................................................................10
BYPASS IN1 TO 4ΩSPEAKER (CLASS D, MINI BOARD) ....................................................12
APPLICATION SUPPORT............................................................................................ 14
IMPORTANT NOTICE .................................................................................................. 15

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BOARD CONFIGURATION STAND-ALONE
The WM9081 Customer Mini Board can be used a stand-alone module for direct connection to a
processor board via flying leads or dedicated headers. This section will detail important
considerations and provide all information required to do this without risking damage to the device.
CONNECTION DIAGRAM
Figure 1 below shows the connections required to power-up and control the WM9081 Customer Mini
Board.
Please refer to Table 1 for further details on external I/O connections. Table 2 contains a list of all
shorting points.
CLASS D SPEAKER
CONTROL INTERFACE
AUDIO INTERFACE
SDIN
SCLK
SPKVDD
IN2
SDOUT/ADDR0
IN1
ANALOGUE IN/OUT
SPKOUTN
CS/ADDR1/4FS
SPKOUTN
SPKOUTP
LRCLK
DACDAT
DBVDD
DCVDD
BCLK
AVDD
MCLK
LINEOUT
SPKOUTP
Figure 1 Stand-Alone Board Configuration

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Customer Information 4
I/O TABLE
SIGNAL BOARD
REFERENCE
IMPORTANT NOTES
Voltage Supplies
AVDD H1: pin 8 AVDD = 2.7V to 3.6V
AVDD must be less than or equal to SPKVDD.
DBVDD H2: pin 8 DBVDD = 1.71V to 3.6V
DCVDD H2: pin 6 DCVDD = 1.71V to 3.6V
DCVDD must be less than or equal to AVDD.
DCVDD must be less than or equal to DBVDD.
SPKVDD H3: pin 8
H3: pin 10
SPKVDD = 2.7V to 5.5V
Ground
DGND
SPKGND
AGND
Common GND
(see Figure 1)
Analogue, digital and speaker grounds must always be
within 0.3V of each other
Control Interface
SCLK H4: pin 6
SDIN/ENA H4: pin 4
SDOUT/ADDR0 H4: pin 8
CS¯¯¯/ADDR1/4FS H4: pin 2
All control interface signals should swing between DGND
and DBVDD
Master Clock
MCLK H1: pin 12
BCLK H1: pin 14
LRCLK H2: pin 2
DACDAT H2: pin 4
All audio interface signals should swing between DGND
and DBVDD
Analogue Inputs
IN1 H3: pin 14
IN2 H3: pin 12 Full scale swing should not exceed AVDD/3.3 Vrms
Analogue Outputs
VMIDC TP23 Midrail voltage decoupling capacitor
SPKOUTN TP17
H3: pin 6 SP1 must be shorted for use of H3: pin 6
SPKOUTP TP13
H3: pin 4 SP4 must be shorted for use of H3: pin 4
LINEOUT H4: pin 12
Table 1 I/O Configuration

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Customer Information 5
SHORTING POINTS AND JUMPER LINKS TABLE
REFERENCE FUNCTION
SP1 Short SP1 to connect SPKOUTN to main board via H3
SP2 Open SP2 to select software control mode (default).
Short SP2 to select hardware control mode.
SP3 Software mode:
Open SP3 to select 2 wire control mode (default).
Short SP3 to select 3/4 wire control mode.
Hardware mode:
Open SP3 to select left audio channel operation (default).
Short SP3 to select right audio channel operation.
SP4 Short SP4 to connect SPKOUTP to main board via H3
SP5 2 wire mode:
Open SP5 to select Addr1 = 0 (default)
Short SP5 to select Addr1 = 1
3-/4- wire mode:
Open SP5 (default)
Hardware mode:
Open SP5 to select Normal mode (default)
Short SP5 to select 4FS mode
SP6 Software mode:
Open SP6 (default)
Hardware (Normal) mode:
Open SP6 and populate R13 to disable WM9081
Short SP6 to enable WM9081
SP7 2 wire mode:
Open SP7 to select Addr0 = 0 (default)
Short SP7 to select Addr0 = 1
4 wire mode:
Open SP7 (SDOUT pin must be configured as CMOS)
SP8 Open SP8 to select 4.1Ω+ 10μH speaker load (J5 must be fitted) (default)
Short SP8 to select 4.1Ωspeaker load (J5 must be fitted)
J1 Fit J1 to connect AVDD to WM9081
J2 Fit J2 to connect DCVDD to WM9081
J3 Fit J3 to connect DBVDD to WM9081
J4 Fit J4 to connect SPKVDD to WM9081
J5 Fit J5 to connect speaker load speaker output
Table 2 List of Shorting Points and Jumper Links

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 6
BOARD CONFIGURATION WITH 6222-EV1-REV1 MAIN BOARD
This section focuses on evaluation of the WM9081-6222-CO28-M-REV2 Customer Mini Board in
combination with the 6222-EV1 main board. This system is the reference platform for measurement
data contained in this document. Please note that only a limited number of usage modes will be
covered.
DAC PLAYBACK TO 4ΩSPEAKER (CLASS D, MAIN BOARD)
The following section details board configuration for DAC playback to 4Ωspeaker (CLASS D, MAIN
board).
BLOCK DIAGRAM
MIXER
SPKVDD SPKGND
AVDD
AGND
VMIDC
DAC
LINEOUT
SDIN/ENA
SCLK
___
CS/ADDR1/4FS
SDOUT/ADDR0
DCVDDDBVDD DGND
SCIM/CHANNEL
SWMODE
DIGITAL FILTERS
VOLUME
CONTROL
PARAMETRIC EQ
DYNAMIC RANGE
CONTROLLER
Voltage
Reference
+6dB to -57dB,
1dB steps
IN2
IN1
0dB / -6dB
0dB / -6dB
FLL
MCLK
BCLK
LRCLK
CONTROL
INTERFACE
___
IRQ
W
WM9081
SPKOUTP
SPKOUTN
Speaker Boost
+5.1dB to 0dB
+6dB to -57dB,
1dB steps
DIGITAL AUDIO
INTERFACE
CLOCK
CONTROL
DACDAT
CLASS D
BOARD CONFIGURATION
USB
Digital Data In
S/PDIF
SPK_P
SPK_N
GND +5V

Customer Information WM9081-6222-CO28-M-REV2
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Customer Information 7
REGISTER SETTINGS
Register settings provided below are simply the minimum requirement to configure the desired path
and have not in any way been optimised.
REG
INDEX
DATA
VALUE COMMENT
0x00 0x9081 Reset
0x0E 0x4001
Clock Control 3(0EH): 4001 CLK_SRC_SEL=0, CLK_OP_ENA=0,
CLK_TO_ENA=0, CLK_DSP_ENA=0, CLK_SYS_ENA=1
0x26 0x8100
Write Sequencer 1(26H): 8100 WSEQ_ENA=1, WSEQ_ABORT=0,
WSEQ_START=1, WSEQ_START_INDEX=000_0000 (SEQUENCE 1)
PERFORMANCE PLOT
Audio Precision 05/15/09 10:42:10WM9081 -- DAC --> CLASS D -- THD+N v Amplitude
ColorSweep Trace Line Style Thick Data Axis Comm ent
1 1 Red Solid 2Anl r.TH D +N Am pl Left A-weight
2 1 Blue Solid 2An lr .THD +N Am pl Left AE S 1 7
System AP2
Board: 6222-EV1-REV1 + WM9081-6222-CO28-M-REV2
Device D ate Co d e : WPF
Input Path: SPDIF_IN
Input Signal: 997Hz; 24-bit; 256fs (fs=48kHz)
Output Path: SPKOUT (4R1 + 10uH Load)
Output Reference: 0dBrA= +8.875 dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V, SPKVDD=+5.0V
BW filter : AUX0025, 22Hz-22kHz
Additional Filtering: as stated
Dither: None
RMS or Averaging: Averaging
-100
-30
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
Notes:
1. The WM9081-6222-CO28-M-REV2 contains a low-pass filter, which can be used to filter the
Class D output signal for monitoring purposes. The filtered output can be observed on J8 (6222-
EV1-REV1) when SP2 and SP3 (6222-EV1-REV1) are shorted. When a suitable loudspeaker
load is used, the on-board low-pass filter is not required.
2. For efficiency and power consumption measurements of the class D output, it is recommended
to leave SP2 and SP3 (6222-EV1-REV1) open to avoid quiescent power consumption in the RC
filter.

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 8
DAC PLAYBACK TO 4ΩSPEAKER (CLASS AB, MINI BOARD)
The following section details board configuration for DAC playback to 4Ωspeaker (CLASS AB, MINI
board).
BLOCK DIAGRAM
BOARD CONFIGURATION
USB
Digital Data In
S/PDIF
SPK_P
SPK_N
GND +5V

Customer Information WM9081-6222-CO28-M-REV2
wMay 2009, Rev 1.0
Customer Information 9
REGISTER SETTINGS
Register settings provided below are simply the minimum requirement to configure the desired path
and have not in any way been optimised.
REG
INDEX
DATA
VALUE COMMENT
0x00 0x9081 Reset
0x0E 0x4001
Clock Control 3(0EH): 4001 CLK_SRC_SEL=0, CLK_OP_ENA=0,
CLK_TO_ENA=0, CLK_DSP_ENA=0, CLK_SYS_ENA=1
0x26 0x8154
Write Sequencer 1(26H): 8154 WSEQ_ENA=1, WSEQ_ABORT=0,
WSEQ_START=1, WSEQ_START_INDEX=101_0100 (SEQUENCE 5)
PERFORMANCE PLOT
A
udio Precision 05/15/09 11:18:31WM9081 -- DAC --> CLASS AB -- THD+N v Amplitude
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Red Solid 2Anlr.THD+N Ampl Left A-weight
2 1 Blue Solid 2Anlr.THD+N Ampl Left AES 1 7
Sys tem AP2
Board: 6222-EV1-REV1 + WM9081-6222-CO28-M-REV2
Device Date Code: WPF
Input Path: SPDIF_IN
Input Signal: 997Hz; 24-bit; 256fs (fs=48kHz)
Output Path: SPKOUT (4R1 + 10uH Load)
Output Reference: 0dBrA = +9.050 dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V, SPKVDD=+5.0V
BW filter : 22H z-22kHz
Additional Filtering: as s tated
Dither: None
RMS or Averaging: Averaging
-100
-30
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 10
DAC PLAYBACK TO LINEOUT
The following section details board configuration for DAC playback to LINEOUT.
BLOCK DIAGRAM
BOARD CONFIGURATION
USB
Digital Data In
S/PDIF
LINEOUT

Customer Information WM9081-6222-CO28-M-REV2
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Customer Information 11
REGISTER SETTINGS
Register settings provided below are simply the minimum requirement to configure the desired path
and have not in any way been optimised.
REG
INDEX
DATA
VALUE COMMENT
0x00 0x9081 Reset
0x0E 0x4001
Clock Control 3(0EH): 4001 CLK_SRC_SEL=0, CLK_OP_ENA=0,
CLK_TO_ENA=0, CLK_DSP_ENA=0, CLK_SYS_ENA=1
0x26 0x812A
Write Sequencer 1(26H): 812A WSEQ_ENA=1, WSEQ_ABORT=0,
WSEQ_START=1, WSEQ_START_INDEX=010_1010 (SEQUENCE 3)
PERFORMANCE PLOT
A
udio Precision 05/15/09 10:35:08WM9081 -- DAC --> LINEOUT -- THD+N v Amplitude
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Red Solid 2Anlr.THD+N Ampl Left A-weight
2 1 Blue Solid 2Anlr.THD+N Ampl Left AES 1 7
Sys tem AP2
Board: 6222-EV1-REV1 + WM9081-6222-CO28-M-REV2
Device Date Code: WPF
Input Path: SPDIF_IN
Input Signal: 997Hz; 24-bit; 256fs (fs=48kHz)
Output Path: LINEOUT (47kOhm Load)
Output Reference: 0dBrA = -0.151 dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V, SPKVDD=+5.0V
BW filter : 22H z-22kHz
Additional Filtering: as s tated
Dither: None
RMS or Averaging: Averaging
-100
-30
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 12
BYPASS IN1 TO 4ΩSPEAKER (CLASS D, MINI BOARD)
The following section details board configuration for Bypass IN1 to 4Ωspeaker (CLASS D, MINI
board).
BLOCK DIAGRAM
BOARD CONFIGURATION
USB
Digital Data In
S/PDIF
SPK_P
SPK_N
GND +5V
IN1

Customer Information WM9081-6222-CO28-M-REV2
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Customer Information 13
REGISTER SETTINGS
Register settings provided below are simply the minimum requirement to configure the desired path
and have not in any way been optimised.
REG
INDEX
DATA
VALUE COMMENT
0x00 0x9081 Reset
0x03 0x0039
Analogue Speaker PGA(03H): 0039 SPKPGA_MUTE=0,
SPKPGAZC=0, SPKPGA_VOL=11_1001
0x04 0x0023
VMID Control(04H): 0023 VMID_BUF_ENA=1, VMID_RAMP=0,
VMID_SEL=01, VMID_FAST_ST=1
0x05 0x002A
Bias Control 1(05H): 002B BIAS_SRC=0, STBY_BIAS_LVL=1,
STBY_BIAS_ENA=0, BIAS_LVL=10, BIAS_ENA=1,
STARTUP_BIAS_ENA=0
0x07 0x0001
Analogue Mixer(07H): 0001 DAC_SEL=0, IN2_VOL=0, IN2_ENA=0,
IN1_VOL=0, IN1_ENA=1
0x08 0x0001
Anti Pop Control(08H): 0001 LINEOUT_DISCH=0, LINEOUT_VROI=0,
LINEOUT_CLAMP=1
0x0B 0x0186
Power Management(0BH): 0186 TSHUT_ENA=1, TSENSE_ENA=1,
TEMP_SHUT=0, LINEOUT_ENA=0, SPKPGA_ENA=1, SPK_ENA=1,
DAC_ENA=0
0x0E 0x4003
Clock Control 3(0EH): 4003 CLK_SRC_SEL=0, CLK_OP_ENA=0,
CLK_TO_ENA=0, CLK_DSP_ENA=1, CLK_SYS_ENA=1
PERFORMANCE PLOT
Audio Precision WM9081 -- IN1 --> CLASS D -- THD+N v Amplitude
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Red Solid 2Anlr.THD+N Ampl Left A-we ig h t
2 1 Blue Solid 2Anlr.THD+N Ampl Left AES 1 7
Sys tem AP2
Board: 6222-EV1-REV1 + WM9081-6222-CO28-M-REV2
Device D ate Code: WPF
Input Path: IN1
Input Signal: 997Hz
Outp ut Path: SPKOUT (4R1 + 10uH Load)
Output Reference: 0dBrA = +8.839dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V, SPKVDD=+5.0V
BW filte r : 22Hz-22kHz
Additional Filtering: as stated
Dither: None
RMS or Averaging: Averaging
-100
-30
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBV

WM9081-6222-CO28-M-REV2 Customer Information
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Customer Information 14
APPLICATION SUPPORT
If you require more information or require technical support, please contact the Wolfson
Microelectronics Applications group through the following channels:
Email: [email protected]
Telephone Apps: [phone]
Fax: [phone]
Mail: Applications Engineering at the address on the last page
or contact your local Wolfson representative.
Additional information may be made available on our web site at:
http://www.wolfsonmicro.com

Customer Information WM9081-6222-CO28-M-REV2
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Customer Information 15
IMPORTANT NOTICE
Wolfson Microelectronics plc (“Wolfson”) products and services are sold subject to Wolfson’s terms and conditions of sale, delivery
and payment supplied at the time of order acknowledgement.
Wolfson warrants performance of its products to the specifications in effect at the date of shipment. Wolfson reserves the right to
make changes to its products and specifications or to discontinue any product or service without notice. Customers should
therefore obtain the latest version of relevant information from Wolfson to verify that the information is current.
Testing and other quality control techniques are utilised to the extent Wolfson deems necessary to support its warranty. Specific
testing of all parameters of each device is not necessarily performed unless required by law or regulation.
In order to minimise risks associated with customer applications, the customer must use adequate design and operating
safeguards to minimise inherent or procedural hazards. Wolfson is not liable for applications assistance or customer product
design. The customer is solely responsible for its selection and use of Wolfson products. Wolfson is not liable for such selection
or use nor for use of any circuitry other than circuitry entirely embodied in a Wolfson product.
Wolfson’s products are not intended for use in life support systems, appliances, nuclear systems or systems where malfunction can
reasonably be expected to result in personal injury, death or severe property or environmental damage. Any use of products by the
customer for such purposes is at the customer’s own risk.
Wolfson does not grant any licence (express or implied) under any patent right, copyright, mask work right or other intellectual
property right of Wolfson covering or relating to any combination, machine, or process in which its products or services might be or
are used. Any provision or publication of any third party’s products or services does not constitute Wolfson’s approval, licence,
warranty or endorsement thereof. Any third party trade marks contained in this document belong to the respective third party
owner.
Reproduction of information from Wolfson datasheets is permissible only if reproduction is without alteration and is accompanied by
all associated copyright, proprietary and other notices (including this notice) and conditions. Wolfson is not liable for any
unauthorised alteration of such information or for any reliance placed thereon.
Any representations made, warranties given, and/or liabilities accepted by any person which differ from those contained in this
datasheet or in Wolfson’s standard terms and conditions of sale, delivery and payment are made, given and/or accepted at that
person’s own risk. Wolfson is not liable for any such representations, warranties or liabilities or for any reliance placed thereon by
any person.
ADDRESS
Wolfson Microelectronics plc
Westfield House
26 Westfield Road
Edinburgh
EH11 2QB
United Kingdom
Tel :: [phone]
Fax :: [phone]
E-mail :: [e-mail]