CMX605(2001) Ver la hoja de datos (PDF) - CML Microsystems Plc

Número de pieza

componentes Descripción

Lista de partido

CMX605
(Rev.:2001)

Digital Line to POTS Interface

CML Microsystems Plc 

Digital Line to POTS Interface

CMX605

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 VBIAS.

Figure 6 Tone Changing

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.

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

© 2001 Consumer Microcircuits Limited

15

D/605/6

Share Link: