CVSD Codec
1.5 General Description
Data Enable
1
0
1
Powersave
1
don't care
0
Encoder Output
Enable
High Z (open circuit)
VSS
Table 2 Encoder Output
CMX639
Clock Mode 1
0
0
1
1
Clock Mode 2
0
1
0
1
Data/Sampling Clock Rate
(CLOCK/XTAL = f = 1.024MHz)
External Clocks
Internally generated @ f/16
Internally generated @ f/32
Internally generated @ f/64
Example for f = 1.024MHz
External Clocks
Internally generated @ 64kbps
Internally generated @ 32kbps
Internally generated @ 16kbps
Table 3 Clock Modes and Pins
1.6 Application Notes
Figure 3 System Configuration using the CMX639
© 2000 Consumer Microcircuits Limited
7
CMX639/2