MT9196 Mitel Semiconductor, MT9196 Datasheet - Page 23

• Manufacturer Part Number: MT9196
• Description: Integrated Digital Phone Circuit (IDPC)
• Manufacturer: Mitel Semiconductor

Preliminary Information
Note: Bits marked "-" are reserved bits and should be written with logic "0".
DTMF/Tone Ringer Control Register
Digital Gain Register
Low Tone Coefficient Register
HiEN, LoEN
DTMF St EN
Ring EN
WR
Transmit (TxG
The frequency of the low group tone is programmed by writing an 8-bit hexadecimal coefficient at this address according to the following
equation:
Where the hexadecimal COEFF is converted into a decimal integer between 0 and 255. Frequency resolution is 7.8125Hz in the range
0 to 1992 Hz.
RxG
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
3
TxG
HiEN
3-0
L7
7
7
7
) and receive (RxG
RxG
3
When high, the programmed tone, for the respective high or low group, is generated. When low, tone generation is
When high, programmed DTMF is muxed into the receive path replacing the receive PCM signal. When low, the
When high, the tone ringer generator is enabled using the coefficients at addresses 1Ah and 1Bh as well as the WR
When high, the tone ringer circuit will toggle between the two programmed frequencies at a 5 Hz rate. When low, the
disabled for the respective low or high group.
receive path functions normally.
control bit. For the ringer tone to be applied to the loudspeaker the proper path must be selected via the Receive
Path Control Register (address 13h). When low, the ring generator circuit is disabled.
tone ringer warble rate is 10Hz.
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
2
LoEN
TxG
L6
6
6
6
2
RxG
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
DTMF
St EN
TxG
1
3-0
L5
5
5
5
) control bits for programming gain in 3 dB increments.
1
RxG
TxG
Ring
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
En
L4
0
4
4
4
Frequency (in Hz) = 7.8125 x COEFF
0
Gain Adjustment (dB)
RxG
L3
3
3
3
-
3
+12
+15
+18
+21
-24
-21
-18
-15
-12
+3
+6
+9
-9
-6
-3
0
RxG
L2
2
2
2
-
2
RxG
L1
1
1
1
-
1
TxG
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ADDRESS = 18h WRITE/READ VERIFY
ADDRESS = 1Ah WRITE/READ VERIFY
ADDRESS = 19h WRITE/READ VERIFY
RxG
WR
L0
3
0
0
0
0
TxG
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
2
TxG
Power Reset Value
Power Reset Value
Power Reset Value
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0000 XXX0
1000 1000
0000 0000
MT9196
TxG
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
7-149