COMMUNICATION SEMICONDUCTORS
EV6090
CMX639 CVSD CODEC
Evaluation Kit
ADVANCE INFORMATION
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Selectable Sample Clock Rates
Easy Jumper/Switch configuration
User Prototyping PCB Area
USER MANUAL
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CMX639 Product Evaluation
Telephone Handset Connectors
On-board Speaker Driver
Variable Gain Input Amplifier
Input Conditioning
Audio -In
x(-1)
Audio +In
Gain Block
P1: 1
P1: 2
P1: 3,4
2
0dB
to
-6dB
Telephone
Handset
(Earpiece)
S
-20dB
to
+20dB
E3
Enc Out
Dec In
D
M
Enc In
D
M
Dec Out
Data
Clocks
x(-47)
Mic Input
Data Rate (2)
Algorithm
E4
CMX639
Speaker
Driver
+20dB
Telephone
Handset (Mic)
Direct In
V+
I N
VDD
I N
AGND
V-
I N
Power
Conditioning
3
Force Idle (2)
Data En
Powersave
4
XTAL
Dec In
Direct Out
Computer
Interface
Switch Control (Local)
The EV6090 is a single board evaluation platform used for the evaluation of the CMX639 CVSD codec. The
board is powered from an external supply that can be used to evaluate CVSD encoder and decoder
performance at different supply voltages.
Jumpers are provided to select signal paths, clock source, measure device current, etc.
Convenient I/O allows connection to a telephone handset, microphone, and/or a loudspeaker for simple
experiments.
2001
MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480218.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
