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CDB8422
Evaluation Board for CS8422
Features
? IEC-60958, AES3/EBU, S/PDIF Inputs
– Single-Ended Inputs via Optical and RCA
Input Jacks
– Differential Inputs via XLR Input Jack
? S/PDIF Outputs
– Optical and RCA Output Jacks
– CS8406 Digital Audio Transmitter
? I/O Stake Headers
Description
Using the CDB8422 evaluation board is an ideal way to
evaluate the CS8422. Use of the board requires a digital
signal source, an analyzer, and a power supply. A Win-
dows PC-compatible computer is also required if using
software mode to configure the CDB8422.
S/PDIF and AES3/EBU input connections are made via
RCA phono, optical, or XLR connectors to the CS8422.
S/PDIF output connections are made via RCA phono or
optical connectors from the CS8406 (S/PDIF Tx). Sys-
tem timing can be provided by a S/PDIF or AES3/EBU
input signal, by the CS8422 with supplied master clock,
–
–
External Control Port Accessibility
External Serial Audio I/O Accessibility
or by an I/O stake header with a DSP connected.
The provided Windows-based software GUI makes
? 3.3 V Logic Interface
? Powered by Single External Power Supply or
PC USB Port Connection
? H/W Control via DIP Switches
configuring the CDB8422 easy. The software communi-
cates through the PC’s USB port to configure the board
so that all features of the CS8422 can be evaluated.
The board may also be configured without a PC con-
nection by using hardware switches; however, not all
configurations of the CDB8422 are possible in hard-
ware mode.
? FlexGUI S/W Control - Windows ? Compatible
– Pre-Defined & User-Configurable Scripts
ORDERING INFORMATION
CDB8422
Evaluation Board
Crystal
Oscillator
Canned
Oscillator
Canned
Oscillator
Jumper
XTI
Reset
RMCK
Mux
OMCK
OSCLK1
ISCLK
ISCLK
ILRCK
OLRCK1
SDOUT1
ILRCK
SDIN
CS8406
TX Output
RX Input
SDIN
CS8422
OSCLK2
OLRCK2
SDOUT2
TDM_IN
USB
USB Micro-
controller
I 2 C/SPI
Resistors
Reset
FPGA
Hardware
Switches
http://www.cirrus.com
Copyright ? Cirrus Logic, Inc. 2010
(All Rights Reserved)
MAY '10
DS692DB2
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