WM8956 6158 FL32 M REV1 Example Configurations

WM8956-6158-FL32-M-REV1
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Example Configurations
DOC TYPE:
EXAMPLE CONFIGURATIONS
BOARD REFERENCE:
WM8956-6158-FL32-M-REV1
BOARD TYPE:
Customer Mini Board
WOLFSON DEVICE(S):
WM8956
DATE:
March 2009
DOC REVISION:
Rev 1.0
INTRODUCTION
The WM8956-6158-FL32-M-REV1 Customer Mini Board is compatible with the 6158-EV1 customer
evaluation board and together provide a complete hardware platform for evaluation of the WM8956.
The WM8956 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 6158-EV1 main board. Configurations
covered are listed below:
•
DAC Playback to headphone on HP_L/R
•
Analogue bypass from L/RINPUT3 to 16Ω headphone on HPL/HPR
•
DAC playback to 8Ω speaker (Mini board)
This document should be used as a starting point for evaluation of WM8956 but it will not cover every
possible configuration.
Assumptions:
1.
The user is familiar with the 6158-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.
WM8956-6158-FL32-M_Schematic_Layout_rev_1.0.pdf
2.
6158-EV1-REV1_Schematic_Layout.pdf
3.
WISCE Quick Start Guide.pdf
WOLFSON MICROELECTRONICS plc
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March 2009, Rev 1.0
Copyright ©2009 Wolfson Microelectronics plc
WM8956-6158-FL32-M-REV1
Customer Information
TABLE OF CONTENTS
INTRODUCTION............................................................................................................. 1
TABLE OF CONTENTS.................................................................................................. 2
BOARD CONFIGURATION STAND-ALONE ................................................................. 3
CONNECTION DIAGRAM .........................................................................................................3
I/O TABLE..................................................................................................................................4
BOARD CONFIGURATION WITH 6158-EV1-REV1 MAIN BOARD .............................. 6
DAC PLAYBACK TO HEADPHONE ON HP_L/R......................................................................6
ANALOGUE BYPASS FROM L/RINPUT3 TO 16Ω HEADPHONE ON HPL/HPR ....................9
DAC PLAYBACK TO 8Ω SPEAKER (MINI BOARD)...............................................................11
APPLICATION SUPPORT............................................................................................ 14
IMPORTANT NOTICE .................................................................................................. 15
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Customer Information
BOARD CONFIGURATION STAND-ALONE
The WM8956 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 WM8956 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 IF
SPK_RP/RN
SCLK
SDIN
SPK_RN
SPKVDD
SPK_RP
SPK_LN
SPK_LP/LN
SPK_LP
SPKVDD
HP_R
OUT_3
HP_L
AUDIO IF
ANALOGUE OUT
GPIO1
DACDAT
DACLRC
BCLK
MCLK
DBVDD
L/R HPOUT
AC coupled
DCVDD
RINPUT3/JD3
RINPUT2
RINPUT1
LINPUT1
LINPUT2
LINPUT3/JD2
MICBIAS
MIC
ANALOGUE IN
Figure 1 Stand-Alone Board Configuration
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I/O TABLE
SIGNAL
BOARD
REFERENCE
IMPORTANT NOTES
Voltage Supplies
AVDD
H4: pin 16
AVDD = 2.7V to 3.6V
AVDD must be less or equal to SPKVDD1 and SPKVDD2
DBVDD
H2: pin 4
DBVDD = 1.71V to 3.6V
DCVDD
H1: pin 16
DCVDD = 1.71V to 3.6V
DCVDD must be less than or equal to AVDD and DBVDD
SPKVDD1
SPKVDD2
Ground
SPKVDD = 2.7V to 5.5V
Common supply:
H3: pin 10, H4: pin 4
DGND
Common GND:
Analogue, digital and speaker grounds must always be
SPKGND1
H2: pin 2, H3: pin 8,
within 0.3V of each other
SPKGND2
H3: pin 16, H4: pin 8
AGND
Control Interface
SCLK
SDIN
Master Clock
H3: pin 2
H3: pin 4
All control interface signals should swing between DGND
and DBVDD
MCLK
H2: pin 6
Signal should swing between DGND and DBVDD
H2: pin 8
H2: pin 10
H2: pin 12
H2: pin 14
All audio interface signals should swing between DGND
and DBVDD
Audio Interface
BCLK
DACLRC
DACDAT
GPIO1
Analogue Inputs
LINPUT1
H1: pin 8
LINPUT2
H1: pin 6
LINPUT3/JD2
H1: pin 4
RINPUT1
H1: pin 10
RINPUT2
H1: pin 12
RINPUT3/JD3
H1: pin 14
Analogue Outputs
Full scale swing should not exceed AVDD/3.3 Vrms
Microphone Bias
MICBIAS
H1: pin 2
VMID
TP27
Midrail voltage decoupling capacitor
SPK_RN
H3: pin 6
Right speaker negative output (unfiltered)
TP19
Right speaker negative output (low-pass filtered)
SPK_RP
H3: pin 12
Right speaker positive output (unfiltered)
TP22
Right speaker positive output (low-pass filtered)
SPK_LN
H3: pin 14
Left speaker negative output (unfiltered)
TP23
Left speaker negative output (low-pass filtered)
SPK_LP
H4: pin 2
Left speaker positive output (unfiltered)
TP25
Left speaker positive output (low-pass filtered)
HP_L
H4: pin 14
HP output (left channel) or
left channel of AC coupled HP Jack (J3)
HP_R
H4: pin 10
HP output (right channel) or
right channel of AC coupled HP Jack (J3)
OUT3
H4: pin 12
Mono, left, right or buffered midrail output for capless
mode
Table 1 I/O Configuration
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SHORTING POINTS TABLE
REFERENCE
SP1
SP2
SP3
SP4
SP5
SP6
SP7
SP8
SP9
SP10
FUNCTION
Short SP1 to connect SPK_LN to main board via H3
Short SP2 to connect SPK_RN to main board via H3
Short SP3 to connect SPK_RP to main board via H3
Short SP4 to connect SPK_LP to main board via H4
Short SP5 to connect HPR to main board via H4
Short SP6 to connect HPL to main board via H4
Short SP7 to bypass C23 (for cap-less headphone mode)
Short SP8 for jack detect via LINPUT3/JD2
Short SP9 to bypass C25 (for cap-less headphone mode)
Short SP10 to connect the SM mic to the DUT via LINPUT1
Table 2 List of Shorting Points
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BOARD CONFIGURATION WITH 6158-EV1-REV1 MAIN BOARD
This section focuses on evaluation of the WM8956-6158-FL32-M-REV1 Customer Mini Board in
combination with the 6158-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 HEADPHONE ON HP_L/R
The following section details board configuration for DAC Playback to headphone on HP_L/R.
BLOCK DIAGRAM
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BOARD CONFIGURATION
USB
HP L/R
Digital Data In
S/PDIF
= Jumper fitted on main board
(concealed by mini board)
REGISTER SETTINGS
Register settings provided below are simply the minimum requirement to configure the desired path
and have not in any way been optimised.
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Customer Information
REG
INDEX
DATA
VALUE
R15
0x000
Reset
R25
0x0C0
VMID=50K, Enable VREF
R26
0x1E0
Enable DACL, DACR, LOUT1 and ROUT1
R47
0x00C
Enable left output mixer and right output mixer
R34
0x100
Left DAC to left output mixer enabled (LD2LO), 0dB
R37
0x100
Right DAC to right output mixer enabled (RD2RO), 0dB
R2
0x179
LOUT1 Vol = 0dB, volume update enabled
R3
0x179
ROUT1 Vol = 0dB, volume update enabled
R5
0x000
Unmute DAC digital soft mute
COMMENT
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PERFORMANCE PLOT
WM8956-6158-FL32-M-REV1 -- DAC-HP THD+N v Amplitude
-60
-65
-70
-75
d
B
r
A
-80
-85
-90
-95
-100
-105
-110
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Sweep
Trace
Color
Line Style
Thick
Data
Axis
Comment
1
1
2
2
1
2
1
2
Cyan
Blue
Magenta
Red
Solid
Solid
Solid
Solid
2
2
2
2
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Left
Left
Left
Left
HPL
HPR
HPL A-weight
HPR A-weight
System AP2
Board: WM8956-6158-FL32-M-REV1-S
Device Date Code: 79AADUT
Input Path: SPDIF_IN
Input Signal: 997Hz; 0dBFS; 24-bit; 256fs (fs=48kHz)
Output Path: HP_L/R
Output Reference: -0.069 dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V
BW filter : 22Hz - 20kHz
Additional Filtering: As stated
Dither: None
RMS or Averaging: Averaging
Load = 10kOhm
DAC_THD+N_vs_Amplitude_to_HPLR_48kHz.at27
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Customer Information
ANALOGUE BYPASS FROM L/RINPUT3 TO 16Ω HEADPHONE ON HPL/HPR
The following section details board configuration for Analogue bypass from L/RINPUT3 to 16Ω
headphone on HPL/HPR.
SCLK
SDIN
MCLK
GPIO1
DACDAT
BCLK
DACLRC
DNC
VMID
AVDD
AGND
BLOCK DIAGRAM
BOARD CONFIGURATION
USB
L/RIN3
HP L/R
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Customer Information
= Jumper fitted on main board
(concealed by mini board)
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WM8956-6158-FL32-M-REV1
Customer Information
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
R15
0x000
Reset
R25
0x0F0
VMID=50K, Enable VREF, AINL and AINR
R26
0x060
Enable LOUT1 and ROUT1
R32
0x000
LINPUT1 not connected to PGA (LMN1)
R33
0x000
RINPUT1 not connected to PGA (RMN1)
R47
0x00C
Enable left and right channel input PGA
R34
0x080
Enable LINPUT3 to left output mixer (LI2LO), LINPUT3 to Left mixer vol
= 0dB
R37
0x080
Enable RINPUT3 to right output mixer (RI2RO), RINPUT3 to Right mixer
vol = 0dB
R2
0x179
LOUT1 Vol = 0dB, volume update enabled
R3
0x179
ROUT1 Vol = 0dB, volume update enabled
COMMENT
PERFORMANCE PLOT
WM8956-6158-FL32-M-REV1 -- Analogue BypassTHD+N v Amplitude (L/RINPUT3, HPL/R)
T
-30
-40
-50
d
B
r
-60
-70
A
-80
-90
-100
-110
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBV
Sweep
Trace
Color
Line Style
Thick
Data
Axis
Comment
1
1
2
2
1
2
1
2
Cyan
Blue
Magenta
Red
Solid
Solid
Solid
Solid
2
2
2
2
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Left
Left
Left
Left
HPL (16R)
HPR (16R)
HPL (16R) A-weight
HPR (16R) A-weight
System AP2
Board: WM8956-6158-FL32-M-REV1-S
Device Date Code: 79AADUT
Input Signal: 997Hz; 0dBV;
Reference Levels: 0dBrA = -1.288 dBV
Supplies: AVDD=DCVDD=DBVDD = +3.3V
Input Signal Path: L/RINPUT3
Output Signal Path: HPL/R (16R Load)
BW Filtering: 22Hz-20kHz
Additional Filtering Type: As stated
Dither = Off
RMS or Averaging = Average
Load = 16R
THD+N_vs_Amplitude_LRINPUT3_to_LROUT1_Bypass.at27
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Customer Information
DAC PLAYBACK TO 8Ω SPEAKER (MINI BOARD)
The following section details board configuration for DAC playback to 8Ω speaker (Mini board).
BLOCK DIAGRAM
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Customer Information
SPK_L
SPK_R
BOARD CONFIGURATION
GND
5V
USB
Digital Data In
S/PDIF
= Jumper fitted on main board
(concealed by mini board)
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WM8956-6158-FL32-M-REV1
Customer Information
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
R15
0x000
Reset
R25
0x0C0
VMID=50K, Enable VREF
R26
0x198
Enable DACL, DACR, SPKL and SPKR
R47
0x00C
Enable left output mixer and right output mixer
R49
0x0F7
Left and Right Speakers Enabled
R51
0x11B
DCGAIN = 1.52x (+3.6dB) and ACGAIN = 1.52x (+3.6dB)
R34
0x100
Left DAC to left output mixer enabled (LD2LO), 0dB
R37
0x100
Right DAC to right output mixer enabled (RD2RO), 0dB
R40
0x179
LSPK Vol = 0dB, volume update enabled
R41
0x179
RSPK Vol = 0dB, volume update enabled
R5
0x000
Unmute DAC digital soft mute
PERFORMANCE PLOT
WM8956-6158-FL32-M-REV1 -- DAC-SPK THD+N v Amplitude
-60
-65
-70
-75
d
B
r
A
-80
-85
-90
-95
-100
-105
-110
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Sweep
Trace
Color
Line Style
Thick
Data
Axis
Comment
1
1
2
2
1
2
1
2
Cyan
Blue
Magenta
Red
Solid
Solid
Solid
Solid
2
2
2
2
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Anlr.THD+N Ampl
Left
Left
Left
Left
SPK_L
SPK_R
SPK_L A-weight
SPK_R A-weight
System AP2 + AUX-00025
Board: WM8956-6158-FL32-M-REV1-S
Device Date Code: 79AADUT
Input Path: SPDIF_IN
Input Signal: 997Hz; 0dBFS; 24-bit; 256fs (fs=48kHz)
Output Path: SPK_L/R
Output Reference: +9.359 dBV
Supplies: AVDD=DBVDD=DCVDD=+3.3V, SPKVDD=+5.0V
BW filter : 22Hz - 20kHz
Additional Filtering: As stated
Dither: None
RMS or Averaging: Averaging
Load = 8R + 10uH
DAC_THD+N_vs_Amplitude_to_SPK_5V_48kHz.at27
NOTES
1.
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Customer Information
The WM8956-6158-FL32_M_REV1 contains a low-pass filter on the bottom side of the
PCB, which can be used to filter the Class D output signal for monitoring purposes. The
filtered output can be observed on TP35/TP36 (left channel) and TP33/TP34 (right
channel). When a suitable loudspeaker load is used, the on-board low-pass filter is not
required. For efficiency and power consumption measurements of the class D output, it is
recommended to remove R28/R29 (left channel) and R30/R31 (right channel) to avoid
quiescent power consumption in the RC filter.
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APPLICATION SUPPORT
If you require more information or require technical support, please contact the Wolfson
Microelectronics Applications group through the following channels:
Email:
Telephone Apps:
Fax:
Mail:
[email protected]
+44 (0) 131 272 7070
+44 (0) 131 272 7001
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
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WM8956-6158-FL32-M-REV1
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 :: +44 (0)131 272 7000
Fax :: +44 (0)131 272 7001
E-mail :: [email protected]
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