CMX867E2 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX867E2' PDF : 48 Pages View PDF
Low Power V.22 Modem
CMX867
In DPSK Rx modem modes b2-0 of the Status Register contain a value indicative of the received
signal BER, see Figure 10. In Rx FSK modem modes bits 2 and 1 will be zero and b0 will show
the output of the frequency demodulator, updated at 8 times the nominal data rate.
Figure 9b Operation of Status Register in DTMF Rx Mode
b3 b2 b1 b0 Low frequency (Hz)
0000
941
0001
697
0010
697
0011
697
0100
770
0101
770
0110
770
0111
852
1000
852
1001
852
1010
941
1011
941
1100
941
1101
697
1110
770
1111
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
Received DTMF Code: b3-0 of Status Register
© 2004 Consumer Microcircuits Limited
31
D/867/5
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