CMX615D4 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX615D4' PDF : 26 Pages View PDF
Digital Line to POTS Interface
CMX615
1.6 Application Notes
When using the Tone/FSK bit (bit 6) of the MODE Register, each tone starts from VBIAS, and returns to
VBIAS before ending:
Figure 5 Tone Starting and Stopping
When switching between tones in the same column (bits 4 - 7 or bits 0 - 3) of the TX TONES
Register), the transition will be phase continuous. However, switching to the “OFF” state will
immediately take the output of that tone generator to V . BIAS
Figure 6 Tone Changing
TX TONES Register decodes which do not have a frequency allocated are indicated by a dash (-) in
the Tone Field tables. These values should not be used.
1.6.1 ‘Telecom Tones
The following tables give the hex codes to be programmed into the particular tone field location for
various telecommunications systems applications. The tables are not exhaustive, but list the more
commonly used tones.
Ringing Signals
(f +-2.5%)
(Hz)
Off
16.7
20
25
35
40
50
Field 0
(Hex)
$00
$01
$02
$03
$04
$05
$06
© 1999 Consumer Microcircuits Limited
14
D/615/4
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