EV6090 Datasheet, PDF (1/12 Pages) CML Microcircuits – ADVANCE INFORMATION

COMMUNICATION SEMICONDUCTORS
USER MANUAL
EV6090
CMX639 CVSD CODEC
Evaluation Kit
ADVANCE INFORMATION
• CMX639 Product Evaluation
• Telephone Handset Connectors
• On-board Speaker Driver
• Variable Gain Input Amplifier
• Selectable Sample Clock Rates
• Easy Jumper/Switch configuration
• User Prototyping PCB Area
Audio -In
Audio +In
Input Conditioning
x(-1)
Mic Input
x(-47)
Telephone
Handset (Mic)
Direct In
V+_{I N}
VDD_{I N}
AGND
V-_{I N}
Power
Conditioning
Gain Block
S
-20dB
to
+20dB
E3
Data Rate (2)
Algorithm
3 _{Force Idle (2)}
Data En
Powersave
4
Dec In
Switch Control (Local)
P1: 1 P1: 2
P1: 3,4
2
Enc Out Dec In
DM DM
Data
Clocks
0dB
to
-6dB
Enc In
Dec Out
CMX639
E4 _Speaker
Driver
+20dB
Telephone
Handset
(Earpiece)
XTAL
Direct Out
Computer
Interface
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: [phone] 744 5050 fax: [phone]
Doc. # 20480218.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.