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FX829 Datasheet

  • FX829

  • CML Semiconductor Products Baseband Signal Processor

  • 34頁

  • CMLMICRO

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CML Semiconductor Products
Baseband Signal Processor
1.0
Features
FX829
D/829/4 September 1997
Provisional Issue
鈥?/div>
Rx Audio Processing
鈥?/div>
Tx Audio Processing
鈥?/div>
1200/2400 Baud Modem
鈥?/div>
DTMF Encoder
鈥?/div>
Multi-standard Modem Formats
鈥?/div>
ETS/MPT/PAA Standards Compatible
鈥?/div>
Low Voltage Operation
鈥?/div>
24-pin Small Form Package
1.1
Brief Description
The FX829 is a low voltage CMOS integrated circuit, designed to provide the baseband audio and
system signal-processing functions required for PAMR or PMR trunked radio applications. It operates
in half-duplex mode under serial-bus control of the host 碌C.
The FX829 incorporates a dual-rate 1200/2400bps FFSK modem, with a software-flexible choice of
synchronisation codewords, data run-length and CRC checking to suit a wide range of applications.
These features allow very flexible handling of non-prescribed data on traffic channels in addition to the
network signalling sent on control channels. A 16 character DTMF encoder is available in the transmit
mode. The two-point modulation output has software programmable level-adjustment.
The audio processing stages include transmit and receive filtering, to the standards specified for
12.5kHz and 25kHz PAMR/PMR channel operation, plus transmit deviation limiting and a
programmable Rx volume control. Power saving is automatic when audio functions are deselected.
The FX829 is designed for use in radios compatible with MPT1327, PAA1382 and ETS 300 086
trunking standards. Its features and flexibility ensure that it is equally suitable for use with modified or
proprietary standards.
漏
1997 Consumer Microcircuits Limited

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