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IV - MICROCONTROLLER INTERFACE
(continued)
IV.3.1 - DifferentCodes
(continued)
-
HFIN inputselection
For answering machine or cordlessconnection,it can be requestedto select HFIN (Pin22) input, without
enabling the loudspeaker, for this the followingprocedure should be sent :
Handsfreecode : 0 1 1 0 0 10
Tx &Rx mutes
: 00 1 0 0 1 0
HFIN input select : 01 1 0 1 1 1
To go back to handsfreemode, send :
Speechmode : 0 01 0 0 0 0
Or to go back to handsetmode, send :
Speechmode : 0 01 0 0 0 0
Handsetcode : 0 1 1 0 0 0 0
- The
DTMF
and
SINE WAVE
codes.
These codes are memorized, independtly from the mode or operatingcode. For example one of these
code can be sent in Handsetmode and when the Dialing mode code is sent,the DTMF frequenciessent
on theline are those previouslyprogrammed in the Handset mode.
Codes
Key in DTMF
Dialing
(Code 0010001 sent before)
a6
a5
a4
a3
a2
a1
a0
0
0
0
0
0
0
0
”2”
0
0
0
0
0
0
1
”1”
0
0
0
0
0
1
0
”A”
0
0
0
0
0
1
1
”3”
0
0
0
0
1
0
0
”8”
0
0
0
0
1
0
1
”7”
0
0
0
0
1
1
0
”C”
0
0
0
0
1
1
1
”9”
0
0
0
1
0
0
0
”5”
0
0
0
1
0
0
1
”4”
0
0
0
1
0
1
0
”B”
0
0
0
1
0
1
1
”6”
0
0
0
1
1
0
0
”0”
0
0
0
1
1
0
1
”*”
0
0
0
1
1
1
0
”D”
0
0
0
1
1
1
1
”#”
DTMF Dialing
SINE WAVE (Code 0011101
or 0011110 sent before)
697Hz + 1336Hz
697Hz + 1209Hz
697Hz + 1633Hz
697Hz + 1477Hz
852Hz + 1336Hz
852Hz + 1209Hz
852Hz + 1633Hz
852Hz + 1477Hz
770Hz + 1336Hz
770Hz + 1209Hz
770Hz + 1633Hz
770Hz + 1477Hz
941Hz + 1336Hz
941Hz + 1209Hz
941Hz + 1633Hz
941Hz + 1477Hz
348Hz or 604Hz
426Hz or 738Hz
385Hz or 668Hz
470Hz or 816Hz
- The Other Codes
Codes
a4
a3
1
1
Remarks
a6
0
0
a5
0
0
a2
0
1
a1
0
1
a0
1
1
0
0
Ring Start
Reset Control (High to Low level on Pin 11 (RESET)), Internal TEA7092 Initialization
and Microprocessor Serial Bus Connection Inhibited
Ring Melody Control, to listen the Ring Melody inthe Loudspeaker DuringOFF-HOOK
Mode.
TEA7092 Initialization(to go back to internal default programmation)
0
1
1
0
0
1
1
0
1
0
1
0
0
0
TEA7092 - TELEPHONE SET INTEGRATEDCIRCUIT
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