WM8523-6228-DT20-EV1 Example Configurations

w
WM8523-6228-DT20-EV1
Example Configurations
DOC TYPE:
Example Configurations
BOARD REFERENCE:
WM8523-6228-DT20-EV1
BOARD TYPE:
Customer Standalone Board
WOLFSON DEVICE(S):
WM8523
DATE:
September 2009
DOC REVISION:
Rev 1.0
INTRODUCTION
The WM8523-6228-DT20-EV1 Customer Standalone Board provides a complete hardware platform
for evaluation of the WM8523. The WM8523 Customer Standalone Board can also be connected
directly to a processor board using flying wires or appropriate headers.
Configurations covered are listed below:

DAC Playback to Line Out
This document should be used as a starting point for evaluation of WM8523 but it will not cover every
possible configuration.
Assumptions:
1.
The user is familiar with the WM8523-6228-DT20-EV1 board and that the board is
configured correctly for the path of interest (see related documents below).
Related documents:
1.
WM8523-6228-DT20-EV1_Schematic_Layout.pdf
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews
September 2009, Rev 1.0
Copyright 2009 Wolfson Microelectronics plc
WM8523-6228-DT20-EV1
Customer Information
TABLE OF CONTENTS
INTRODUCTION ............................................................................................................. 1
TABLE OF CONTENTS .................................................................................................. 2
BOARD CONFIGURATION STAND-ALONE ................................................................. 3
CONNECTION DIAGRAM ......................................................................................................... 3
I/O TABLE.................................................................................................................................. 4
SYSTEM BOARD CONFIGURATION ............................................................................ 5
DAC PLAYBACK TO LINE OUT ................................................................................................ 5
APPLICATION SUPPORT ......................................................................................................... 7
IMPORTANT NOTICE .................................................................................................... 8
ADDRESS: ................................................................................................................................ 8
w
Customer Information
September 2009, Rev 1.0
2
WM8523-6228-DT20-EV1
Customer Information
BOARD CONFIGURATION STAND-ALONE
The WM8523 Customer Standalone 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 WM8523 Customer
Standalone Board.
Please refer to Table 1 for further detail on external I/O connections.
Figure 1 Stand-Alone Board Configuration
w
Customer Information
September 2009, Rev 1.0
3
WM8523-6228-DT20-EV1
Customer Information
I/O TABLE
SIGNAL
BOARD
REFERENCE
PART TO
REMOVE
IMPORTANT NOTES
R18
R9
LINEVDD and AVDD must always be within 0.3V of
each other and at 3.3V ± 10%
Voltage Supplies
AVDD
LINEVDD
Ground
J7.2
J4.2
AGND
LINEGND
Master Clock
TP6
TP6
Analogue grounds must always be within 0.3V of each
other
H1.2
Jumper H1.1
Master clock
LRCLK
H1.6
Jumper H1.5
Digital audio interface left/right clock
BCLK
H1.10
Jumper H1.9
Digital audio interface bit clock
DACDAT
H1.14
Jumper H1.13
Digital audio interface data input
SDOUT
H2.2
Jumper H2.1
SDA
H2.6
Jumper H2.5
MCLK
Control Interface
HW MODE
SW MODE
0 = No de-emphasis
I C Address bit [1]
1 = De-emphasis
SDOUT pin (SPI Mode)
AIFMODE[1 :0]
Serial Control Interface
data Input Pin
00 = LJ 24-bit
SCLK
H2.10
Jumper H2.9
2
01 = I S 24-bit
10 = RJ 16-bit
2
Serial Control Interface
clock input Pin
11 = RJ 24-bit
¯¯¯
CS
CIFMODE
H2.14
H2.18
Jumper H2.13
Jumper H2.17
Referenced to LINEVDD level
Audio Interface
2
0 = Mute enabled
I C Address bit [0]
1 = Mute disabled
CS (SPI Mode)
Z = Hardware Mode
0 = I C Mode
2
1 = SPI mode
Analogue Outputs
LINEVOUTL
J5
Left line output
LINEVOUTR
J8
Right line output
Table 1 I/O Configuration
Table 1 above shows the points on the board where external stimuli can be connected, and the
description of each pins function.
It also details the components that must be removed before external stimuli are connected to avoid
bus contention.
w
Customer Information
September 2009, Rev 1.0
4
WM8523-6228-DT20-EV1
Customer Information
SYSTEM BOARD CONFIGURATION
This section focuses on evaluation of the WM8523-6228-DT20-EV1 Customer Standalone 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 LINE OUT
The following section details board configuration for DAC playback to line out.
BLOCK DIAGRAM
Figure 2 WM8523 Block Diagram
w
Customer Information
September 2009, Rev 1.0
5
WM8523-6228-DT20-EV1
Customer Information
BOARD CONFIGURATION
Figure 3 Board Configuration
w
Customer Information
September 2009, Rev 1.0
6
WM8523-6228-DT20-EV1
Customer Information
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
w
Customer Information
September 2009, Rev 1.0
7
WM8523-6228-DT20-EV1
Customer Information
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]
w
Customer Information
September 2009, Rev 1.0
8