CMX867D2 CML Microcircuits, CMX867D2 Datasheet - Page 29

• Manufacturer Part Number: CMX867D2
• Description: Low power V.22 modem
• Manufacturer: CML Microcircuits

Low Power V.22 Modem
2001 Consumer Microcircuits Limited
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.
b3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
b2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
b1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Figure 9b Operation of Status Register in DTMF Rx Mode
b0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Received DTMF Code: b3-0 of Status Register
Low frequency (Hz)
941
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
29
High frequency
1633
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
(Hz)
Keypad symbol
D
C
A
B
1
2
3
4
5
6
7
8
9
0
#
*
CMX867
D/867/2