CMX605P3 CML Microcircuits, CMX605P3 Datasheet - Page 15

• Manufacturer Part Number: CMX605P3
• Description: Digital Line to POTS Interface
• Manufacturer: CML Microcircuits

Digital Line to POTS Interface
1.6
1.6.1
2001 Consumer Microcircuits Limited
Application Notes
When using the Tone/FSK bit (bit 6) of the MODE Register, each tone starts from V
returns to V
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
TX TONES Register decodes which do not have a frequency allocated are indicated by “-“ in the
Tone Field tables. These values should not be used.
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
(Hz)
16.7
Off
20
25
35
40
50
2.5%)
BIAS
before ending:
Figure 5 Tone Starting and Stopping
Field 0
(Hex)
$00
$01
$02
$03
$04
$05
$06
Figure 6 Tone Changing
15
BIAS
.
BIAS,
and
CMX605
D/605/6