CMX867E2 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX867E2' PDF : 48 Pages View PDF
Low Power V.22 Modem
CMX867
Tx Mode Register b8-0: DTMF/Tones mode
If DTMF/Tones transmit mode has been selected (Tx Mode Register b15-12 = 0001) then b8-5
should be set to 0000 and b4-0 will select a DTMF signal or a fixed tone or one of four
programmed tones or tone pairs for transmission.
b4 = 0: Tx fixed tone or programmed tone pair
b3 b2 b1 b0 Tone frequency (Hz)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
No tone
697
770
852
941
1209
1336
1477
1633
1300
2100
2225
Tone pair TA
Tone pair TB
Tone pair TC
Tone pair TD
(Calling tone)
(Answer tone)
(Answer tone)
Programmed Tx tone or tone pair, see 1.5.10.8
“
“
“
b4 = 1: Tx DTMF
b3 b2 b1 b0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Low frequency (Hz)
941
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
High frequency (Hz)
1633
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
Keypad symbol
D
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
© 2004 Consumer Microcircuits Limited
25
D/867/5
Share Link: 
