Wolfson WM8510-EV1M Instruction Manual

WM8510-EV1M
Evaluation Board User Handbook
Rev 1.1

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TABLE OF CONTENTS
TABLE OF CONTENTS.............................................................................................................2
INTRODUCTION ........................................................................................................................4
GETTING STARTED..................................................................................................................4
EVALUATION BOARD CHECKLIST .................................................................................................4
CUSTOMER REQUIREMENTS .......................................................................................................4
PCB MAIN CONNECTIONS ......................................................................................................5
POWER SUPPLIES ......................................................................................................................5
DIGITAL INPUT ...........................................................................................................................5
DIGITAL OUTPUT ........................................................................................................................6
ANALOGUE INPUT ......................................................................................................................6
ANALOGUE OUTPUT ...................................................................................................................7
USB CONNECTIONS ....................................................................................................................7
INTERFACES.............................................................................................................................8
HEADERS ..................................................................................................................................9
LINKS AND JUMPERS ..................................................................................................................9
SWITCHES...............................................................................................................................10
SOFTWARE CONTROL ..........................................................................................................11
SELECTION OF CONTROL MODE ................................................................................................11
3-WIRE SERIAL CONTROL MODE ...............................................................................................11
2-WIRE SERIAL CONTROL MODE ...............................................................................................11
REGISTER MAP ......................................................................................................................13
WM8510 BLOCK DIAGRAM ...................................................................................................14
WM8510-EV1S CONTROL SOFTWARE DESCRIPTION.......................................................15
SOFTWARE DOWNLOAD ...........................................................................................................15
SOFTWARE INSTALLATION ........................................................................................................15
REGISTER WRITE CONTROL PANELS..........................................................................................16
SETUP TEXT FILES ...................................................................................................................19
DEFAULT SETUP - SLAVE MODE .........................................................................................20
ADDITIONAL HARDWARE CONFIGURATIONS....................................................................22
MASTER MODE SETUP ..............................................................................................................22
EXTERNAL POWER SUPPLIES SETUP .........................................................................................24
HPDETECT,HEADPHONE AND BTL SPEAKER SETUP ....................................................................26
SCHEMATIC LAYOUT.............................................................................................................28
PCB LAYOUT ..........................................................................................................................34
WM8510-EV1B BILL OF MATERIAL ......................................................................................37
APPENDICES...........................................................................................................................40
USB INTERFACE TROUBLESHOOTING...............................................................................40
MESSAGE BOX EXPLANATIONS -COMMUNICATIONS ISSUES ........................................................40
USB COMMUNICATIONS ISSUES.................................................................................................41
MESSAGE BOX EXPLANATIONS -FILE LOAD/SAVE FUNCTIONS .....................................................44

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EXTERNAL DSP CONNECTION TO THE WM8510-EV1B ....................................................46
AUDIO INTERFACE CONNECTIONS .............................................................................................46
SOFTWARE INTERFACE ............................................................................................................48
EVALUATION SUPPORT ........................................................................................................50
IMPORTANT NOTICE..............................................................................................................51
ADDRESS:...............................................................................................................................51
REVISION HISTORY ...............................................................................................................52

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INTRODUCTION
The WM8510 is mono codec with pseudo-differential microphone and additional auxiliary input. The
device is equipped with dedicated mono headphone and speaker output drivers.
This evaluation platform and documentation should be used in conjunction with the latest version of
the WM8510 datasheet. The datasheet gives device functionality information as well as timing and
data format requirements.
This evaluation platform has been designed to allow the user ease of use and give optimum
performance in device measurement.
GETTING STARTED
EVALUATION BOARD CHECKLIST
The following items are available from Wolfson:
•WM8510-EV1B Evaluation Board - 6140_SSOP28_EV1_REV1
•WM8510-EV1S Control Software (download from http://www.wolfsonmicro.com)
•WM8510-EV1M User Handbook (download from http://www.wolfsonmicro.com)
CUSTOMER REQUIREMENTS
PC requirements are:
•PC with USB connection
•Operating systems supported Win XP/2000
Minimum signal path requirements are:
•An analogue input source
•S/PDIF signal source
•S/PDIF receiving unit

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PCB MAIN CONNECTIONS
POWER SUPPLIES
Power is supplied to the WM8510 USB interface via the USB connector. If preferred, it is also
possible to supply +5V power to the audio interface level shift buffers from external supplies to 4mm
connectors.
Using appropriate USB cable a +5V supply can be connected as described in Table 1.
REF-DES SOCKET NAME SUPPLY
J28 USB +5V
Table 1 USB Power Supply Connection
Using appropriate power leads with 4mm connectors, external supplies can be connected as
described in Table 2.
REF-DES SOCKET NAME SUPPLY
J32 +5V +5V
J33 GND 0V
J34 DCVDD +1.71V to +3.6V
J35 DBVDD +1.71V to +3.6V
J36 SPKVDD +2.5V to +5.0V
J37 GND 0V
J38 AVDD +2.5V to +3.6V
Table 2 External Power Supply Connections
Note: Refer to WM8510 datasheet for current limitations on individual supply voltages.
Important: Exceeding the recommended maximum voltage can damage EVB components.
Under voltage may cause improper operation of some or all of the EVB components.
DIGITAL INPUT
There are two methods to input the required digital signal clocks to the WM8510 audio interface. An
AES/EBU, UEC958, S/PDIF, EIAJ CP340/1201 signal from coaxial input via a standard phono
connector (J20) or direct digital input is available via one side of a 2x8 pin header (H1).
A level shift IC (U3) has been included in the digital input interface path to provide signal buffering to
the input signals; this allows an external clock source to be matched to the WM8510 requirements.
In Master mode the WM8510 only requires an MCLK input to produce an ADCDAT output, which
can be derived either from S/PDIF signal clock recovery or by connecting an external MCLK direct to
J17, H1 or H2. The BCLK and LRCLK clocks can also be derived from the S/PDIF signal clock
recovery or by discrete input to header H1.
CONNECTOR
REFERENCE
CONNECTOR TYPE SIGNAL REFERENCE
J20 Phono Connector SPDIF_IN
J17 SMB Connector MCLK
H1 pin 2 Header FRAME_IN
H1 pin 6 Header BCLK_IN
H1 pin 10 Header DACDAT
H1 pin 14 Header MCLK
H2 pin 1 Header MCLK
Table 3 Digital Input Connections

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Important: It must be noted that the CS8427 SPDIF decoder IC will only work at a rate of 256fs.
This will limit the sample rates that may be set using the WM8510 unless an external source is used
supplying signals directly to the relevant pins of header H1 or taking the signals from the relevant
pins of header H5.
DIGITAL OUTPUT
The ADC output can be converted to an S/PDIF signal via the CS8427CS device (U5) and output
from the WM8510 evaluation board via a standard phono connector (J15). Alternatively the ADC
output data and clocks may be accessed via one side of a 2x6 pin header (H5).
A level shift IC (U3) has been included in the digital output interface path to provide signal buffering
to the output signals; this allows external receiver requirements to be met.
The GPIO pin can output the PLL MCLK in addition to other internal signals for external application
use, J8 will access the GPIO output.
CONNECTOR
REFERENCE
CONNECTOR TYPE SIGNAL REFERENCE
H5 pin 1 Header ADCDAT
H5 pin 5 Header BCLK_OUT
H5 pin 9 Header LRC_OUT
J15 Phono Connector SPDIF_OUT
J8 SMB Connector GPIO1_OUT
Table 4 Digital Output Connections
ANALOGUE INPUT
The main analogue inputs can be configured in one of two ways, either via two phono connectors or
via a microphone jack socket. These inputs can be used with pseudo-differential input signals, but in
the case of the microphone jack (J2), R23 must be removed to disconnect the headphone ground
from board ground for pseudo-differential configuration.
An additional input can be connected a phono connector (J6).
CONNECTOR
REFERENCE
CONNECTOR TYPE SIGNAL REFERENCE
J2 Jack Socket Mic Input
J6 Phono Connector MIC2
J10 Phono Connector MICN
J11 Phono Connector MICP
Table 5 Analogue Input Connections
Switches SW3 and SW4 select between the jack socket or phono connector for the microphone
input.

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ANALOGUE OUTPUT
The analogue outputs can be configured in one of three ways, either via two phono connectors,
spring loaded speaker terminals or via a jack socket.
CONNECTOR
REFERENCE
CONNECTOR TYPE SIGNAL REFERENCE
J14 Jack Socket Mono Headphone Out
J16 Phono Connector SPKOUTN/SPKOUTP
J26 Speaker Connector Speaker Connector
Table 6 Analogue Input Connections
All WM8510 device pins are accessible for easy measurement via the 8-pin headers (H3 and H6)
running along each side of the device.
USB CONNECTIONS
The 2-wire or 3-wire control signals can be input from the control software via USB connector (J28);
these signals are interpreted by the USB Controller (U10). Alternatively it is possible to connect 2-
wire or 3-wire control signals directly via test points TP5, TP8 and TP11.
CONNECTOR
REFERENCE
CONNECTOR TYPE PIN NUMBER SIGNAL REFERENCE
J28 FCI USB Connector Type B 1 VBUS
2 DN
3 DP
4 GND
5 SHEILD
6 SHEILD
Table 7 Software Control

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INTERFACES
Figure 1 Interfaces

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HEADERS
H3 WM8510 PIN NAME H6 WM8510 PIN NAME
1 1 VMID 1 15 DUT_BCLK
2 2 MICN 2 16 DUT_MCLK
3 3 MICP 3 17 DUT_CSB/GPIO
4 4 MICBIAS 4 18 DUT_SCLK
5 5 DUT_AVDD 5 19 DUT_SDIN
6 6 DUT_AVDD 6 20 DUT_MODE
7 7 AGND 7 21 MONOOUT
8 8 AGND 8 22 SPKOUTP
9 9 DUT_DCVDD 9 23 SPKGND
10 10 DUT_DBVDD 10 24 SPKGND
11 11 DGND 11 25 SPKOUTN
12 12 DUT_ADCDAT 12 26 SPKVDD
13 13 DUT_DACDAT 13 27 SPKVDD
14 14 DUT_FRAME 14 28 MIC2
H1 PIN NAME H5 PIN NAME
1-2 FRAME_IN 1-2 ADCDAT
3-4 GND 3-4 GND
5-6 BCLK_IN 5-6 BCLK_OUT
7-8 GND 7-8 GND
9-10 DACDAT 9-10 LRC_OUT
11-12 GND 11-12 GND
13-14 MCLK
15-16 GND
Table 8 Headers
LINKS AND JUMPERS
LINKS & JUMPERS LINK STATUS DESCRIPTION
LNK3 SHORT
OPEN
Slave LRC selected [default setting]
Master LRC selected
LNK4 SHORT
OPEN
Slave BCLK selected [default setting]
Master BCLK selected
LNK5 1-2
2-3
CSB connected [default setting]
GPIO1 connected
LNK7 SHORT
OPEN
DCVDD connected [default setting]
DCVDD unconnected [allows current measurement]
LNK8 SHORT
OPEN
DBVDD connected [default setting]
DBVDD unconnected [allows current measurement]
LNK9 SHORT
OPEN
SPKVDD connected [default setting]
SPKVDD unconnected [allows current measurement]
LNK10 SHORT
OPEN
AVDD connected [default setting]
AVDD unconnected [allows current measurement]
J1 SHORT
OPEN
HPDETECT selected
HPDETECT selected [default setting]
Table 9 Links and Jumpers

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SWITCHES
SWITCH SWITCH POSITION DESCRIPTION
SW3 1-2
2-3
Ground selected [default setting]
MICN phono input selected
SW4 1-2
2-3
Mic jack input selected
MICP phono selected [default setting]
SW7 CS8427 Reset
SW8 1-2
2-3
SPDIF PCM clocks input select [default setting]
0ption presently unavailable
SW9 TAS1020B Reset
SW11 1-2
2-3
External DCVDD supply selected
USB DCVDD supply selected [default setting]
SW12 1-2
2-3
External DBVDD supply selected
USB DBVDD supply selected [default setting]
SW13 1-2
2-3
External SPKVDD supply selected
USB SPKVDD supply selected [default setting]
SW14 1-2
2-3
External AVDD supply selected
USB AVDD supply selected [default setting]
SW16 1-2
2-3
External +5V supply selected
USB +5V supply selected [default setting]
SW20 1-2
2-3
-ve speaker terminal selected
SPKOUTN phono selected [default setting]
SW21 1-2
2-3
+ve speaker terminal selected
SPKOUTP phono selected [default setting]
Table 10 Switches