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Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
Cirrus Logic, Inc.
www.cirrus.com
CDB4245
Evaluation Board for CS4245
Features
z Single-ended Analog Inputs
z Single-ended Analog Outputs
z CS8406 S/PDIF Digital Audio Transmitter
z CS8416 S/PDIF Digital Audio Receiver
z Independent ADC and DAC Clock Domains
z Header for Optional External Software
Configuration of CS4245
z Header for External PCM Serial Audio I/O
z 3.3 V Logic Interface
z Pre-defined Software Scripts
z Demonstrates Recommended Layout and
Grounding Arrangements
z Windows
®
Compatible Software Interface
to Configure CS4245 and Inter-board
Connections
ORDERING INFORMATION
CDB4245 Evaluation Board
Description
The CDB4245 evaluation board is an excellent means
for evaluating the CS4245 CODEC. Evaluation requires
an analog/digital signal source and analyzer, and power
supplies. A Windows
®
PC compatible computer must be
used to evaluate the CS4245.
System timing for the I²S, Left-Justified and Right-Justi-
fied interface formats can be provided by the CS4245,
the CS8416, the CS8406, or by a PCM I/O stake header
with an external source connected.
RCA phono jacks are provided for the CS4245 analog in-
puts and outputs. Digital data I/O is available via RCA
phono or optical connectors to the CS8416 and CS8406.
The Windows
®
software provides a GUI to make config-
uration of the CDB4245 easy. The software
communicates through the PC’s serial port to configure
the control port registers so that all features of the
CS4245 can be evaluated. The evaluation board may
also be configured to accept external timing and data
signals for operation in a user application during system
development.
I
CS4245
FPGA
CS8416 CS8406
Passive Input Filter
Header
Active Input Filter
Header
Microphone Input
Passive Output Filter
Active Output Filter
Canned
Oscillator
Canned
Oscillator
Control Port Interface
Test Points
CS8416 CS8406
M
U
X
Master Clock Master Clock
Sub-clocks and Data
FEB ‘05
DS656DB1
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Inhaltsverzeichnis

Seite 1 - Evaluation Board for CS4245

Copyright © Cirrus Logic, Inc. 2005(All Rights Reserved)Cirrus Logic, Inc.www.cirrus.comCDB4245Evaluation Board for CS4245Featuresz Single-ended Analo

Seite 2 - TABLE OF CONTENTS

CDB424510 DS656DB14.4.2 SPDIF Recovered Clock - SPDIF to DAC & ADC to SPDIFUsing the pre-configured script file named “SPDIF Recovered Clock - SPD

Seite 3 - LIST OF TABLES

CDB4245DS656DB1 115. FPGA REGISTER QUICK REFERENCEThis table shows the register names and their associated default values.Addr Function 7 6 5432 1 001

Seite 4 - 1.3 CS4245 Audio CODEC

CDB424512 DS656DB16. FPGA REGISTER DESCRIPTION6.1 CODE REVISION ID - ADDRESS 01HFunction:Identifies the revision of the FPGA code. This register is Re

Seite 5

CDB4245DS656DB1 136.3 SUBCLOCK SOURCE CONTROL - ADDRESS 03H6.3.1 DAC SUBCLOCK SOURCE (BITS 5:4)Default = 01Function:These bits select the source of th

Seite 6 - 3.2 CS8406 SDIN Source

CDB424514 DS656DB16.4 CS4245 SDIN SOURCE CONTROL - ADDRESS 04H6.4.1 SDIN SOURCE (BITS 1:0)Default = 00Function:These bits select the source of the CS4

Seite 7 - 4.1 CDB4245 Controls Tab

CDB4245DS656DB1 157. CDB CONNECTORS, JUMPERS, AND SWITCHES CONNECTORReference Designator INPUT/OUTPUT SIGNAL PRESENT+5V J1 Input+5.0 V Power Supp

Seite 8 - 4.2 S/PDIF I/O Controls Tab

CDB424516 DS656DB1 JUMPER PURPOSE POSITION FUNCTION SELECTEDJ3 Selects the source of voltage for the VLC supply.+1.8 V+2.5 V+3.3 V+5 V*Voltage source

Seite 9 - 4.3 Register Maps Tab

CDB4245DS656DB1 178. CDB BLOCK DIAGRAM CS4245FPGACS8416 CS8406Passive Input FilterHeaderActive Input FilterHeaderMicrophone InputPassive Out

Seite 10

CDB424518 DS656DB19. CDB SCHEMATICS Figure 5. CS4245

Seite 11 - Addr Function 7 6 5432 1 0

CDB4245DS656DB1 19 Figure 6. Analog Inputs

Seite 12 - 6. FPGA REGISTER DESCRIPTION

CDB42452 DS656DB1TABLE OF CONTENTS1. SYSTEM OVERVIEW ...

Seite 13 - Table 4. ADC Subclock Source

CDB424520 DS656DB1 Figure 7. Analog Outputs

Seite 14

CDB4245DS656DB1 21 Figure 8. S/PDIF I/O

Seite 15

CDB424522 DS656DB1 Figure 9. Control Port

Seite 16

CDB4245DS656DB1 23 Figure 10. FPGA

Seite 17 - DS656DB1 17

CDB424524 DS656DB1 Figure 11. Discrete Clock Routing and Level Shifting

Seite 18 - 9. CDB SCHEMATICS

CDB4245DS656DB1 25 Figure 12. Power

Seite 19 - DS656DB1 19

CDB424526 DS656DB110.CDB LAYOUT Figure 13. Silk Screen

Seite 20 - 20 DS656DB1

CDB4245DS656DB1 27 Figure 14. Topside Layer

Seite 21 - DS656DB1 21

CDB424528 DS656DB1 Figure 15. Bottom side Layer

Seite 22 - 22 DS656DB1

CDB4245DS656DB1 2911.REVISION HISTORY Revision Date ChangesDB1 February 2005 Initial ReleaseTable 9. Revision HistoryContacting Cirrus Logic SupportFo

Seite 23 - DS656DB1 23

CDB4245DS656DB1 3LIST OF FIGURESFigure 1. CDB4245 Controls Tab...

Seite 24 - 24 DS656DB1

CDB42454 DS656DB11. SYSTEM OVERVIEW The CDB4245 evaluation board is an excellent means for evaluating the CS4245 CODEC. Analog and digital audiosignal

Seite 25 - DS656DB1 25

CDB4245DS656DB1 51.6 FPGAThe FPGA handles both clock and data routing on the CDB4245. Clock and data routing selections madevia the CDB4245 Controls t

Seite 26 - 10.CDB LAYOUT

CDB42456 DS656DB11.12 USB Control PortThe USB control port connector (J37) is currently unavailable.2. SYSTEM CLOCKINGThe CDB4245 implements two discr

Seite 27 - DS656DB1 27

CDB4245DS656DB1 74. PC SOFTWARE CONTROLThe CDB4245 is shipped with a Microsoft Windows® based graphical user interface which allows control over theCS

Seite 28 - 28 DS656DB1

CDB42458 DS656DB14.2 S/PDIF I/O Controls TabWhen the CDB4245 is configured to make use of the CS8416 S/PDIF receiver or CS8406 S/PDIF transmit-ter, th

Seite 29 - 11.REVISION HISTORY

CDB4245DS656DB1 94.3 Register Maps TabThe Register Maps tab provides low level control over the register level settings of the CS4245, CS8416,CS8406,

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