CML’s CMX7032 and CMX7042 ICs are making waves in the global marine Automatic Identification System (AIS) transponder market. These highly integrated baseband signalling processors fulfil the requirements of all marine AIS transponders, AIS Rx-only units and AtoN (Aids to Navigation) systems, suitable for both large and small passenger and cargo vessels.
Both processors have been specifically designed for use in AIS units utilising Limiter-Discriminator RF architecture. Both are half-duplex in operation, comprising two parallel Limiter-Discriminator Rx paths and one I and Q or two-point modulation Tx path, configurable for both marine AIS or DSC operation.
The two have identical core functions. One provides maximum integration with the inclusion of two on-board auxiliary RF synthesizers. The other comes without RF synthesizers, offering maximum RF system flexibility and the smallest foot-print package for designers wishing to separate baseband and RF operations.
Both devices push on-chip integration to new levels by performing signal modulation/demodulation and associated AIS functions, such as training sequence detection, NRZI conversion and HDLC processing (flags, bit stuffing, CRC generation and checking). Combined with the integrated Tx/Rx data buffers, the overall host microcontroller processing requirements are greatly reduced. Auxiliary DAC and ADC functions are provided to further simplify system hardware design, thus reducing overall end-product size and cost, which are major market drivers.
Both products utilize the company’s proprietary FirmASIC component technology. On-chip sub-systems are configured by a Function Image. This is a data file that is uploaded during device initialisation and configures the device’s function and feature-set. The Function Image can be loaded automatically from an optional external EEPROM or from a host microcontroller over the built-in C-BUS serial interface. The device’s features and functions can be enhanced by subsequent Function Image releases, facilitating in-field upgrades. Both devices operate from a single 3.3 V supply.
electronica, booth A5.201
EPP Europe 444
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