Signalling processors are all at sea
A CML Microcircuits product story
Edited by the Electronicstalk editorial team Sep 25, 2006
Highly integrated baseband signalling processors fulfil the requirements of all marine AIS transponders, AIS Rx-only units and AtoN (aids to navigation) systems.
CML's new CMX7032 and CMX7042 ICs are making waves in the global marine automatic identification system (AIS) transponder market.
These new 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.
The CMX7032 and CMX7042 have been specifically designed for use in AIS units using limiter-discriminator RF architectures.
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.
Both the CMX7032 and CMX7042 have identical core functions.
The CMX7032 provides maximum integration with the inclusion of two onboard auxiliary RF synthesisers.
The CMX7042 comes without RF synthesisers, offering maximum RF system flexibility and the smallest footprint 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 sise and cost, which are major market drivers.
The CMX7032 and CMX7042 use CML's proprietary FirmASIC component technology.
On-chip subsystems 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.
The CMX7032 and CMX7042 operate from a single 3.3V supply, with the CMX7032 being available in either a 64-pin VQFN or a 64-pin LQFP package.
The CMX7042 is available in a 48-pin VQFN or 48-pin LQFP package.
The guide price for the CMX7032 is $9.80 and the guide price for the CMX7042 is $8.90.
Evaluation kits are available for both products (PE0201 or PE0401) along with a universal interface board (PE0001).
The CMX7032 and CMX7042 add to the range of marine AIS products offered by CML.
The recently launched CMX910 is also available for designers wishing to use an I/Q based architecture (guide price of $10.50).
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