1 product information cml semiconductor products product summary FX529 ffsk modem for trunked radio systems FX529 ffsk receiver sync sync rx enable 1.008 mhz output a 1 rx data ready rx data rdy tx data rdy tx idle transmitter output rx message format lo rx message format rx checksum true hi d 3 d 6 tx data ready d 0 a 0 rx carrier detect tx parity enable d 2 d 5 tx idle d 7 rx checksum true d 1 d 4 timer expired tx parity enable synt synt tx enable byte status control checksum sync/synt tx data buffer tx data checksum interrupt data data recovered clock rx carrier detect microprocessor interface rx data buffer byte carrier detect time constant counter register register clock generators timer counter detector 8-bit p bus rx data register register generator generator counter ffsk transmitter receiver input xtal/clock clocks v dd v bias v ss strobe xtal irq r/w 1200/2400 baud brief description the FX529 is a single-chip cmos 1200 baud ffsk modem, designed primarily for use in trunked radio systems but may also be employed in other general purpose radio or line data communication applications. this device conforms to both the paa 1382 french trunked radio, and the proposed etsi i-ets 300 230 binary interchange of information and signalling specifications. the FX529 is full duplex at 1200 baud and includes an 8-bit parallel microprocessor interface and a programmable timer which may be set for interrupt periods of between 8 and 120 bits. preamble data and an error-check word are automatically generated in the transmit mode. error checking is performed and the 16-bit sync (1011010000110011) or synt (0100101111001100) word detected in the receive mode. an on-chip xtal/clock generator requiring an external 4.032mhz xtal or clock input provides all microcircuit filter sampling clocks and modem timings whilst also supplying a clock 4 output (1.008mhz). pin and function compatible with the fx429, the fx429 data sheet should be consulted when using this device the FX529, which has a powersaving facility, requires a single 5-volt power supply and is available in both cerdip dil and plastic smd packages. features paa 1382 and general purpose trunked radio applications meets etsi i-ets 300 230 binary signalling specification full-duplex 1200 baud operation high intelligence error checking in receive frame sync/synt detection preamble generation processor compatible interface carrier detection on-chip general purpose timer error check word generation
2 cml does not assume any responsibility for the use of any circuitry described. no circuit patent licences are implied and cml reserves the right at any time without notice to change the said circuitry. FX529 - brief specification package styles available FX529j 24-pin cerdip dil (j4) FX529lg 24-pin quad plastic encapsulated bent and cropped (l1) FX529ls 24-lead plastic leaded chip carrier (l2) function ffsk modem for trunked radio systems supply voltage range 4.5 to 5.5 volts supply current (5.0v) 7.0 ma maximum control 8-bit parallel duplex full data rate 1200 baud xtal/clock frequency 4.032 mhz package styles 24-pin cerdip dil (FX529j) 24-pin plcc (FX529lg) 24-pin plcc (FX529ls) full details of this product are available from cml or its distributors v bias v dd v dd v ss v ss v ss transmit output microprocessor data interface receive input xtal xtal/clock 'cd' time constant 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 FX529j d 1 d 1 d 6 irq d 3 d 4 a 0 d 5 d 0 d 0 d 7 a 2 d 2 d 5 a 1 d 4 d 2 d 6 d 3 d 7 strobe 4 clock
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