mt9094apr1 Zarlink Semiconductor, mt9094apr1 Datasheet - Page 21

• Manufacturer Part Number: mt9094apr1
• Description: Fully Featured Digital Telephone Circuit With Embedded Dsp For Tone Generation And Hands Free Operation
• Manufacturer: Zarlink Semiconductor

Tone Coeff Register 1-DTMF or Tone Ringer
Tone Coeff Register 2-DTMF or Tone Ringer
This register is used to program the low-group frequency of the DTMF program. The tone coefficient is calculated as follows:
This register is used to program the first frequency of the squarewave ringer program. The tone coefficient is calculated as follows:
This tone can be disabled by writing zero to this register for single tone generation.
This register is used to program the high-group frequency of the DTMF program. The tone coefficient is calculated as follows:
This register is used to program the second frequency of the squarewave program. The tone coefficient is calculated similarly to tone coefficient reg-
ister 1.
COEF = 0.128 x Frequency
where: Frequency is in Hz (note: COEF must be converted to an 8 bit binary integer)
Highest frequency possible:
Lowest frequency possible:
Frequency resolution:
Pre-twist:
COEF = 8000 / Frequency
where: Frequency is in Hz (note: COEF must be rounded off and converted to an 8 bit binary integer)
Highest frequency possible:
Lowest frequency possible:
Frequency resolution:
COEF = 0.128 x Frequency
where: Frequency is in Hz (note: COEF must be converted to an 8 bit binary integer)
Highest frequency possible:
Lowest frequency possible:
Frequency resolution:
Pre-twist:
B7
B7
7
7
B6
B6
6
6
B5
B5
5
5
B4
B4
1992.2 Hz
7.8 Hz
7.8 Hz
-2.1 dB
4000 Hz
31.4 Hz
non-linear
1992.2 Hz
7.8 Hz
7.8 Hz
0 dB
4
4
Zarlink Semiconductor Inc.
±
B3
B3
0.2 dB
3
3
MT9094
21
B2
B2
2
2
B1
B1
1
1
ADDRESS = 23h WRITE/READ VERIFY
ADDRESS = 24h WRITE/READ VERIFY
B0
B0
0
0
ADDRESS 25h is RESERVED
Power Reset Value
Power Reset Value
0000 0000
0000 0000
Data Sheet