ML7005 Просмотр технического описания (PDF) - Oki Electric Industry
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ML7005 Datasheet PDF : 25 Pages
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¡ Semiconductor
ML7005
DTMFT and DTMFR Registers
16 kinds of DTMF transmit signals can be determined by setting the DTMFT register.
16 kinds of DTMF receive signals can be monitored from the DTMFR register.
The table 3 shows the DTMF signal codes.
Even if the DTMF transmit code is changed while the DTMF signal is being transmitted
(MFC="1"), the output frequency is not changed.
DTT3
DTR3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
DTT2
DTR2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
Table 3 DTMF Signal Code List
DTT1
DTR1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
DTT0
DTR0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
DIGIT
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
Low group
signal (Hz)
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
941
High group
signal (Hz)
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
1633
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