MC145745FW Freescale, MC145745FW Datasheet - Page 12

• Manufacturer Part Number: MC145745FW
• Manufacturer: Freescale

Specifications of MC145745FW

• Main Category: Single Chip
• Power Supply Type: Analog
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Pin Count: 28
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Supplier Unconfirmed

MC145745
12
FSK Mode
FSK Loopback
CPT Detect Mode
Answer Tone
Transmission Mode
DTMF Transmission
Mode
Single Tone
Transmission Mode
Power Down 1
Power Down 2
DTMF Reception Mode
DTMF Loopback
Register
b3
0
0
0
0
0
0
0
0
1
1
b2
Attenuator Range
0
0
0
0
1
1
1
1
0
0
Transmission
Table 4. Transmission Attenuator Range
– 10 dB
– 11 dB
– 12 dB
– 13 dB
– 14 dB
– 15 dB
– 1 dB
– 2 dB
– 3 dB
– 4 dB
– 5 dB
– 6 dB
– 7 dB
– 8 dB
– 9 dB
0 dB
b1
0
0
1
1
0
0
1
1
0
0
Table 3. Function Mode Setup
b0
0
1
0
1
0
1
0
1
0
1
b3
The device works as one of two FSK modes, V.21/V.23.
The FSK modulator is internally connected to the FSK demodulator.
The device works as the 400 Hz tone detector.
The device works as the 2100 Hz answer tone generator.
The device works as the DTMF generator. The receiver is disabled.
The device outputs one of the eight tones used for DTMF.
Whole circuits except for the SCP and the oscillator circuit are disabled.
Whole circuits except for the SCP are disabled.
The device works as the DTMF receiver. The received DTMF tone is
demodulated to the 4–bit code, then output from the SCP interface
and/or the parallel port.
The DTMF generator is internally connected to the DTMF receiver, then
the DTMF code written in BR5 is loopbacked to the parallel port (PB0 –
PB3).
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
b2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
b1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
b0
Comments
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
MOTOROLA