MT9092AP Zarlink, MT9092AP Datasheet - Page 33

• Manufacturer Part Number: MT9092AP
• Description: Digital Telephone 44-Pin PLCC Tube
• Manufacturer: Zarlink

Specifications of MT9092AP

• Package: 44PLCC
• Power Supply Type: Analog
• Typical Supply Current: 8 mA
• Typical Operating Supply Voltage: 5 V
• Minimum Operating Supply Voltage: 4.75 V
• Maximum Operating Supply Voltage: 5.25 V

Addresses:
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 register 1
Tone Coeff Register 1-DTMF or Tone Ringer
Tone Coeff Register 2-DTMF or Tone Ringer
Tone Ringer Warble Rate-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.
The tone ringer will switch between squarewave frequencies at a warble frequency defined by this register. The relationship between the duration
period of each tone and the 8 bit warble coefficient is as follows:
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 = 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:
Tone duration (warble frequency) = 500 / COEF
where: Frequency is in Hz, and 0≤COEF <256
Highest frequency possible:
Lowest frequency possible:
Frequency resolution:
27h to 2Dh are transmit and receive gains and coefficients used by the filters in the handsfree decision cir-
cuit.
2Eh to 3Fh are scratch-pad ram locations used by the DSP algorithms as temporary storage during calcula-
tions.
B7
B7
B7
7
7
7
B6
B6
B6
6
6
6
B5
B5
B5
5
5
5
1992.2 Hz
7.8 Hz
7.8 Hz
0dB
B4
B4
B4
1992.2 Hz
7.8 Hz
-2.1dB
4000 Hz
31.4 Hz
non-linear
500 Hz
non-linear
4
7.8 Hz
4
4
2.0 Hz
Zarlink Semiconductor Inc.
±
B3
B3
B3
0.2dB
3
3
3
MT9092
33
B2
B2
B2
2
2
2
B1
B1
B1
1
1
1
ADDRESS = 23h WRITE/READ VERIFY
ADDRESS = 24h WRITE/READ VERIFY
ADDRESS = 26h WRITE/READ VERIFY
B0
B0
B0
0
0
0
ADDRESS 25h is RESERVED
Power Reset Value
Power Reset Value
Power Reset Value
0000 0000
0000 0000
0000 0000
Data Sheet